procore-sr-prelim-serv-man.pdf ProCore SR Deep Tine Aerators June, 2009, 2009 PRELIMINARY

Part No. xxxxx

Service Manual

ProCoreR SR Series

Preface

The purpose of this publication is to provide the servicetechnician with information for troubleshooting, testingand repair of major systems and components on theProCore SR series deep tine aerators: models SR54,SR54--S, SR70, SR70--S and SR72.

REFER TOTHEOPERATOR’SMANUAL FOROPER-ATING, MAINTENANCE AND ADJUSTMENTINSTRUCTIONS. For reference, insert a copy of theOperator’sManuals andPartsCatalog for yourmachineinto Chapter 2 of this service manual. Additional copiesof the Operator’s Manuals and Parts Catalog are avail-able on the internet at www.Toro.com.

The ToroCompany reserves the right to changeproductspecifications or this publication without notice.

This safety symbol means DANGER, WARNING,or CAUTION, PERSONAL SAFETY INSTRUC-TION. When you see this symbol, carefully readthe instructions that follow. Failure to obey theinstructions may result in personal injury.

NOTE: ANOTE will give general information about thecorrect operation, maintenance, service, testing or re-pair of the machine.

IMPORTANT: The IMPORTANT notice will give im-portant instructionswhichmust be followed to pre-vent damage to systems or components on themachine.

E The Toro Company -- 2009

ProCore SR Series

This page is intentionally blank.

ProCore SR Series

Table Of Contents

Chapter 1 -- Safety

Safety Instructions 1 -- 2. . . . . . . . . . . . . . . . . . . . . . . . . .Safety and Instruction Decals 1 -- 4. . . . . . . . . . . . . . . .

Chapter 2 -- Product Records and Maintenance

Product Records 2 -- 1. . . . . . . . . . . . . . . . . . . . . . . . . . .Maintenance 2 -- 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Equivalents and Conversions 2 -- 2. . . . . . . . . . . . . . . .Torque Specifications 2 -- 3. . . . . . . . . . . . . . . . . . . . . . .

Chapter 3 -- Chassis

Service and Repairs 3 -- 2. . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4 -- Coring Head (SR54 & SR70)

Specifications 4 -- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .General Information 4 -- 4. . . . . . . . . . . . . . . . . . . . . . . .Special Tools 4 -- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Service and Repairs 4 -- 8. . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5 -- Coring Head (SR72)

Specifications 5 -- 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .General Information 5 -- 4. . . . . . . . . . . . . . . . . . . . . . . .Special Tools 5 -- 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Service and Repairs 5 -- 6. . . . . . . . . . . . . . . . . . . . . . . .

Safety

ProductRecords

andMaintenance

Chassis

CoringHead

(SR54

&SR70)

CoringHead

(SR72)

ProCore SR Series


ProCore SR Series Page 1 -- 1 Safety

Chapter 1

Safety

Table of Contents

SAFETY INSTRUCTIONS 2. . . . . . . . . . . . . . . . . . . . . .Before Operating 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .While Operating 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Maintenance and Service 3. . . . . . . . . . . . . . . . . . . .

SAFETY AND INSTRUCTION DECALS 4. . . . . . . . . .

Safety

ProCore SR SeriesPage 1 -- 2Safety

Safety Instructions

The ProCore SR series of deep tine aerators are de-signed and tested to offer safe service when operatedand maintained properly. Although hazard control andaccident prevention partially are dependent upon thedesign and configuration of the machine, these factorsare also dependent upon the awareness, concern andproper training of the personnel involved in the opera-tion, transport, maintenance and storage of the ma-chine. Improper use or maintenance of themachine canresult in injury or death. To reduce the potential for injuryor death, comply with the following safety instructions.

WARNING

To reduce the potential for injuryor death, com-ply with the following safety instructions.

Before Operating

1. Review and understand the contents of the Opera-tor’s Manual before starting and operating the vehicle.Become familiar with the controls and know how to stopthe vehicle and engine quickly. Additional copies of theOperator’s Manual are available on the internet atwww.Toro.com.

2. Keep all shields, safety devices and decals in place.If a shield, safety device or decal is defective, illegibleor damaged, repair or replace it before operating themachine.

3. Make sure that the tractor is carefully selected to as-sure the best performance and safe operation of theProCore deep tine aerator.

4. Make sure that operator is familiar with safe tractoroperation.

5. Tighten any loose nuts, bolts or screws to ensuremachine is in safe operating condition.

6. Make sure that the ProCore deep tine aerator isproperly attached to tractor.

ProCore SR Series Page 1 -- 3 Safety

While Operating

IMPORTANT: To prevent damage to your ProCoreaerator during operation:• Never operate ProCore aerator without tineheads installed.• Do not operate the tractor in reverse when theProCore aerator is lowered.• Make sure aerator roller is on ground before op-erating aerator. Never operate with the aerator inthe raised position.• Never operate the tractor PTO in excess of 540RPM.

1. Operator should be on the tractor when starting theengine and when operating the aerator. Stay away fromthe aerator coring head when it is engaged.

2. Before starting the engine on the tractor:

A. Apply the parking brake.

B. Make sure traction lever or transmission is inneu-tral and PTO is disengaged.

C. Refer to Tractor Operator’s Manual for safe start-ing procedures.

3. Do not run tractor engine in a confined area withoutadequate ventilation. Exhaust fumes are hazardousand could possibly be deadly.

4. If abnormal aerator vibration is detected, disengagePTO and stop tractor immediately. Determine source ofvibration and correct problem(s) before resuming theuse of aerator.

5. While operating, the combination of the tractor andthe ProCore aerator may exceed noise levels of85dB(A) at the operator position. Hearing protection isrecommended for prolongedexposure to reduce thepo-tential of permanent hearing damage.

6. Before leaving the operator’s position of the tractor:

A. DisengagePTOpower to aerator and lower aera-tor to the ground.

B. Apply parking brake on tractor. Stop engine andremove key from ignition switch.

C. Wait for all moving parts to stop before leavingthe tractor.

Maintenance and Service

1. TheOperator’s Manual provides information regard-ing the operation, general maintenance and mainte-nance intervals for your ProCore aerator. Refer to thispublication for additional informationwhen servicing themachine.

2. Before servicing or making adjustments to aerator,disengage tractor PTO, position aerator on a level sur-face and lower aerator to the ground. Apply tractor park-ing brake, stop engine and remove key from the ignitionswitch.

3. Make sure machine is in safe operating condition bykeeping all nuts, bolts and screws tight.

4. Use care when checking or servicing the coringhead: wear gloves and use caution.

5. Never step over the PTO shaft to reach other side ofaerator. Walk around the machine instead.

6. The friction clutch on the PTO driveshaft may be-come hot during use. Make sure that clutch has cooledbefore performing any service on the driveshaft.

7. Before disconnecting aerator from tractor, installstorage stand to aerator frame and park aerator on ahard, level surface.

8. After servicing the aerator, be sure that all guardsand covers are properly installed and secured.

9. At the time of manufacture, the machine conformedto all applicable safety standards. To assure optimumperformance and continued safety certification of themachine, use genuine Toro replacement parts and ac-cessories. Replacement parts and accessories madeby other manufacturers may result in non-conformancewith the safety standards, and the warranty may bevoided.

10.If major repairs are ever needed or assistance is de-sired, contact an Authorized Toro Distributor.

Safety

ProCore SR SeriesPage 1 -- 4Safety

Safety and Instruction Decals

Numerous safety and instruction decals are affixed tothe ProCore SR series deep tine aerator. If any decalbecomes illegible or damaged, install a new decal. Partnumbers for replacement decals are listed in your PartsCatalog. Order replacement decals from your Autho-rized Toro Distributor.

ProCore SR Series Page 2 -- 1 Product Records and Maintenance

Chapter 2

Product Records and Maintenance

Table of Contents

PRODUCT RECORDS 1. . . . . . . . . . . . . . . . . . . . . . . . .MAINTENANCE 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .EQUIVALENTS AND CONVERSIONS 2. . . . . . . . . . .Decimal and Millimeter Equivalents 2. . . . . . . . . . . .U.S. to Metric Conversions 2. . . . . . . . . . . . . . . . . . .

TORQUE SPECIFICATIONS 3. . . . . . . . . . . . . . . . . . . .Fastener Identification 3. . . . . . . . . . . . . . . . . . . . . . .Standard Torque for Dry, Zinc Plated andSteel Fasteners (Inch Series) 4. . . . . . . . . . . . . . .

Standard Torque for Dry, Zinc Plated andSteel Fasteners (Metric Fasteners) 5. . . . . . . . . . .

Other Torque Specifications 6. . . . . . . . . . . . . . . . . .Conversion Factors 6. . . . . . . . . . . . . . . . . . . . . . . . . .

Product Records

Insert Operator’s Manual and Parts Catalog for yourProCore SR Series deep tine aerator at the end of thischapter. Additionally, if any optional equipment or ac-cessories have been installed to your ProCore, insertthe Installation Instructions, Operator’s Manuals andParts Catalogs for those options at the end of this chap-ter.

Maintenance

Maintenance procedures and recommended service in-tervals for the ProCore SR Series deep tine aerator arecovered in theOperator’s Manual. Refer to that publica-tion when performing regular equipment maintenance.

ProductRecords

andMaintenance

0.09375

ProCore SR SeriesPage 2 -- 2Product Records and Maintenance

Equivalents and Conversions


Torque Specifications

Recommended fastener torque values are listed in thefollowing tables. For critical applications, as determinedby Toro, either the recommended torque or a torque thatis unique to the application is clearly identified and spe-cified in this Service Manual.

These Torque Specifications for the installation andtightening of fasteners shall apply to all fasteners whichdo not have a specific requirement identified in this Ser-vice Manual. The following factors shall be consideredwhen applying torque: cleanliness of the fastener, useof a thread sealant (e.g. Loctite), degree of lubricationon the fastener, presence of a prevailing torque feature,hardness of the surface underneath the fastener’s heador similar condition which affects the installation.

As noted in the following tables, torque values should bereduced by 25% for lubricated fasteners to achievethe similar stress as a dry fastener. Torque values mayalso have to be reduced when the fastener is threadedinto aluminum or brass. The specific torque valueshould be determined based on the aluminum or brassmaterial strength, fastener size, length of thread en-gagement, etc.

The standard method of verifying torque shall be per-formed by marking a line on the fastener (head or nut)and mating part, then back off fastener 1/4 of a turn.Measure the torque required to tighten the fastener untilthe lines match up.

Fastener Identification

Figure 1

Grade 1 Grade 5 Grade 8

Inch Series Bolts and Screws

Figure 2

Class 8.8 Class 10.9

Metric Bolts and Screws

ProductRecords

andMaintenance


Standard Torque for Dry, Zinc Plated and Steel Fasteners (Inch Series)

Thread SizeGrade 1, 5 &8 with ThinHeight Nuts

SAE Grade 1 Bolts, Screws, Studs &Sems with Regular Height Nuts

(SAE J995 Grade 2 or Stronger Nuts)





in--lb in--lb N--cm in--lb N--cm in--lb N--cm

# 6 -- 32 UNC10 + 2 13 + 2 147 + 23

15 + 2 170 + 20 23 + 2 260 + 20

# 6 -- 40 UNF10 + 2 13 + 2 147 + 23

17 + 2 190 + 20 25 + 2 280 + 20

# 8 -- 32 UNC13 + 2 25 + 5 282 + 30

29 + 3 330 + 30 41 + 4 460 + 45

# 8 -- 36 UNF13 + 2 25 + 5 282 + 30

31 + 3 350 + 30 43 + 4 485 + 45

# 10 -- 24 UNC18 + 2 30 + 5 339 + 56

42 + 4 475 + 45 60 + 6 675 + 70

# 10 -- 32 UNF18 + 2 30 + 5 339 + 56

48 + 4 540 + 45 68 + 6 765 + 70

1/4 -- 20 UNC 48 + 7 53 + 7 599 + 79 100 + 10 1125 + 100 140 + 15 1580 + 170

1/4 -- 28 UNF 53 + 7 65 + 10 734 + 113 115 + 10 1300 + 100 160 + 15 1800 + 170

5/16 -- 18 UNC 115 + 15 105 + 17 1186 + 169 200 + 25 2250 + 280 300 + 30 3390 + 340

5/16 -- 24 UNF 138 + 17 128 + 17 1446 + 192 225 + 25 2540 + 280 325 + 30 3670 + 340

ft--lb ft--lb N--m ft--lb N--m ft--lb N--m

3/8 -- 16 UNC 16 + 2 16 + 2 22 + 3 30 + 3 41 + 4 43 + 4 58 + 5

3/8 -- 24 UNF 17 + 2 18 + 2 24 + 3 35 + 3 47 + 4 50 + 4 68 + 5

7/16 -- 14 UNC 27 + 3 27 + 3 37 + 4 50 + 5 68 + 7 70 + 7 95 + 9

7/16 -- 20 UNF 29 + 3 29 + 3 39 + 4 55 + 5 75 + 7 77 + 7 104 + 9

1/2 -- 13 UNC 30 + 3 48 + 7 65 + 9 75 + 8 102 + 11 105 + 10 142 + 14

1/2 -- 20 UNF 32 + 3 53 + 7 72 + 9 85 + 8 115 + 11 120 + 10 163 + 14

5/8 -- 11 UNC 65 + 10 88 + 12 119 + 16 150 + 15 203 + 20 210 + 20 285 + 27

5/8 -- 18 UNF 75 + 10 95 + 15 129 + 20 170 + 15 230 + 20 240 + 20 325 + 27

3/4 -- 10 UNC 93 + 12 140 + 20 190 + 27 265 + 25 359 + 34 375 + 35 508 + 47

3/4 -- 16 UNF 115 + 15 165 + 25 224 + 34 300 + 25 407 + 34 420 + 35 569 + 47

7/8 -- 9 UNC 140 + 20 225 + 25 305 + 34 430 + 45 583 + 61 600 + 60 813 + 81

7/8 -- 14 UNF 155 + 25 260 + 30 353 + 41 475 + 45 644 + 61 660 + 60 895 + 81

NOTE: Reduce torque values listed in the table aboveby 25% for lubricated fasteners. Lubricated fastenersare defined as threads coated with a lubricant such asoil, graphite or thread sealant such as Loctite.

NOTE: Torque values may have to be reduced wheninstalling fasteners into threaded aluminum or brass.The specific torque value should be determined basedon the fastener size, the aluminum or base materialstrength, length of thread engagement, etc.

NOTE: The nominal torque values listed above forGrade 5 and 8 fasteners are based on 75% of the mini-mum proof load specified in SAE J429. The tolerance isapproximately + 10% of the nominal torque value. Thinheight nuts include jam nuts.


Standard Torque for Dry, Zinc Plated and Steel Fasteners (Metric Fasteners)

Thread SizeClass 8.8 Bolts, Screws and Studs with

Regular Height NutsClass 10.9 Bolts, Screws and Studs with

Regular Height NutsThread Size Regular Height Nuts(Class 8 or Stronger Nuts)

Regular Height Nuts(Class 10 or Stronger Nuts)

M5 X 0.8 57 + 5 in--lb 640 + 60 N--cm 78 + 7 in--lb 885 + 80 N--cm

M6 X 1.0 96 + 9 in--lb 1018 + 100 N--cm 133 + 13 in--lb 1500 + 150 N--cm

M8 X 1.25 19 + 2 ft--lb 26 + 3 N--m 27 + 2 ft--lb 36 + 3 N--m

M10 X 1.5 38 + 4 ft--lb 52 + 5 N--m 53 + 5 ft--lb 72 + 7 N--m

M12 X 1.75 66 + 7 ft--lb 90 + 10 N--m 92 + 9 ft--lb 125 + 12 N--m

M16 X 2.0 166 + 15 ft--lb 225 + 20 N--m 229 + 22 ft--lb 310 + 30 N--m

M20 X 2.5 325 + 33 ft--lb 440 + 45 N--m 450 + 37 ft--lb 610 + 50 N--m

NOTE: Reduce torque values listed in the table aboveby 25% for lubricated fasteners. Lubricated fastenersare defined as threads coated with a lubricant such asoil, graphite or thread sealant such as Loctite.

NOTE: Torque values may have to be reduced wheninstalling fasteners into threaded aluminum or brass.The specific torque value should be determined basedon the fastener size, the aluminum or base materialstrength, length of thread engagement, etc.

NOTE: The nominal torque values listed above arebased on 75% of the minimum proof load specified inSAEJ1199.The tolerance is approximately + 10%of thenominal torque value.

ProductRecords

andMaintenance


Other Torque Specifications

SAE Grade 8 Steel Set Screws

Thread SizeRecommended Torque

Thread SizeSquare Head Hex Socket

1/4 -- 20 UNC 140 + 20 in--lb 73 + 12 in--lb

5/16 -- 18 UNC 215 + 35 in--lb 145 + 20 in--lb

3/8 -- 16 UNC 35 + 10 ft--lb 18 + 3 ft--lb

1/2 -- 13 UNC 75 + 15 ft--lb 50 + 10 ft--lb

Thread Cutting Screws(Zinc Plated Steel)

Type 1, Type 23 or Type F

Thread Size Baseline Torque*

No. 6 -- 32 UNC 20 + 5 in--lb

No. 8 -- 32 UNC 30 + 5 in--lb

No. 10 -- 24 UNC 38 + 7 in--lb

1/4 -- 20 UNC 85 + 15 in--lb

5/16 -- 18 UNC 110 + 20 in--lb

3/8 -- 16 UNC 200 + 100 in--lb

Wheel Bolts and Lug Nuts

Thread Size Recommended Torque**

7/16 -- 20 UNFGrade 5

65 + 10 ft--lb 88 + 14 N--m

1/2 -- 20 UNFGrade 5

80 + 10 ft--lb 108 + 14 N--m

M12 X 1.25Class 8.8

80 + 10 ft--lb 108 + 14 N--m

M12 X 1.5Class 8.8

80 + 10 ft--lb 108 + 14 N--m

** For steel wheels and non--lubricated fasteners.

Thread Cutting Screws(Zinc Plated Steel)

ThreadSize

Threads per InchBaseline Torque*Size

Type A Type BBaseline Torque*

No. 6 18 20 20 + 5 in--lb

No. 8 15 18 30 + 5 in--lb

No. 10 12 16 38 + 7 in--lb

No. 12 11 14 85 + 15 in--lb

*Hole size,material strength,material thickness& finishmust be considered when determining specific torquevalues. All torque values are based on non--lubricatedfasteners.

Conversion Factors

in--lb X 11.2985 = N--cm N--cm X 0.08851 = in--lbft--lb X 1.3558 = N--m N--m X 0.7376 = ft--lb

ProCore SR Series Page 3 -- 1 Chassis

Chapter 3

Chassis

Table of Contents

SERVICE AND REPAIRS 2. . . . . . . . . . . . . . . . . . . . . .Operator’s Manual 2. . . . . . . . . . . . . . . . . . . . . . . . . .Roller (ProCore SR54, SR54--S, SR70and SR70--S) 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Roller (ProCore SR72) 4. . . . . . . . . . . . . . . . . . . . . . .PTO Driveshaft 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .PTO Driveshaft Clutch Service 8. . . . . . . . . . . . . . . .PTO Driveshaft Cross and Bearing Service 10. . . .Covers (ProCore SR54, SR54--S, SR70and SR70--S) 12. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Covers (ProCore SR72) 14. . . . . . . . . . . . . . . . . . . . .

Chassis

ProCore SR SeriesPage 3 -- 2Chassis

Service and Repairs

Operator’s Manual

The Operator’s Manual provides information regardingthe operation, general maintenance and maintenanceintervals for your ProCore aerator. Refer to this publica-tions for additional information when servicing the ma-chine.

Roller (ProCore SR54, SR54--S, SR70 and SR70--S)

1. Aerator frame2. Flange bearing (2 used)3. Lock nut (2 used per bearing)4. Roller5. Single roller boot (2 used)

6. Lock washer (2 used)7. Cap screw (2 used)8. Lock washer (2 used)9. Cap screw (2 used)10. Scraper

11. Cap screw (2 used per bearing)12. Cap screw (2 used)13. Lock washer (2 used)14. Flat washer (2 used)

Figure 1

FRONT

RIGHT

PROCORE SR54 SHOWN

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

2

3

68

9

10

11

13

1

5

7

12

14

4


NOTE: ProCore SR54 and SR 72 aerators use a singleroller with two (2) bolt flange bearings (Fig. 1). ModelsSR54--S and SR72--S use two (2) rollers each sup-portedwith two (2) bolt flange bearings (Fig. 2). The pro-cedure for removal and installation of the rollers is thesame. The ProCore SR54 is shown in Figure 1.

Roller Removal (Fig. 1)

1. Position aerator on a firm, level surface with aeratorattached to tractor. Disengage PTO, apply tractor park-ing brake, stop engine and remove key from the ignitionswitch. Support aerator to prevent it from moving.

2. Chock roller to prevent it from moving.

3. Loosen two (2) set screws that secure each bearinglocking collar to roller shaft (Fig. 3).

4. Remove cap screws and lock nuts that secure bothflange bearings (item 2) to aerator frame.

5. Start engine on tractor. Slowly raise aerator while al-lowing roller to remain on the ground. Stop tractor en-gine and remove key from the ignition switch. Supportraised aerator to prevent it from lowering unexpectedly.

CAUTION

Toprevent personal injury,makesure that rolleris supported as it is removed from themachine.

6. Remove roller with flange bearings from under ma-chine.

7. Slide bearings from roller shaft ends.

Roller Installation (Fig. 1)

1. Clean roller shaft ends and apply antiseize lubricantto shaft ends. Slide bearings onto roller shaft ends. Donot tighten set screws in bearings at this time.

CAUTION

Toprevent personal injury,makesure that rolleris supported as it is installed to the machine.

2. Position roller with flange bearings under raised aer-ator.

3. Start engine on tractor. Slowly lower aerator to posi-tion aerator frame to roller assembly.Stop tractor engineand remove key from the ignition switch.

4. Align holes in bearing flangeswith holes in roller booton aerator frame. Orientate bearing so that grease fit-tings point to front of aerator. Secure both flange bear-ings to frame with cap screws and lock nuts.

5. Check that roller is free to rotate and no binding ex-ists. Center roller between bearings.

6. Tighten two (2) set screws to secure each bearinglocking collar to roller shaft ends.

7. Lubricate grease fittings on bearings.

1. Back roller2. Main roller3. Cap screw4. Flange bearing

5. Lock nut6. Double roller boot7. Aerator frame

Figure 2

1

234

3

4

5

5

6

7

PROCORE SR54--S SHOWN

1. Bearing2. Bearing housing (2 bolt)

3. Set screw (2 used)4. Grease fitting

Figure 3

1

23

4

Chassis


Roller (ProCore SR72)

1. Aerator frame2. Scraper3. Roller

4. Cap screw5. Flange bearing (2 used)6. Lock nut

7. Vertical roller bar (2 used)8. Lock washer (2 used)9. Cap screw (2 used)

Figure 4

FRONT

RIGHT

PROCORE SR72 SHOWN

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

2

36

89

1

5

7

46

4

Roller Removal (Fig. 4)

1. Position aerator on a firm, level surface with aeratorattached to tractor. Disengage PTO, apply tractor park-ing brake, stop engine and remove key from the ignitionswitch. Support aerator to prevent it from moving.

2. Chock roller to prevent it from moving.

3. Loosen two (2) set screws that secure each bearinglocking collar to roller shaft (Fig. 5).

4. Remove four (4) cap screws and lock nuts that se-cure both vertical roller bars (item 7) to aerator frame.

5. Start engine on tractor. Slowly raise aerator while al-lowing roller assembly to remain on the ground. Stoptractor engine and remove key from the ignition switch.Support raised aerator to prevent it from lowering unex-pectedly.

CAUTION

Toprevent personal injury,makesure that rolleris supported as it is removed from themachine.


6. Remove roller with vertical roller bars and flangebearings from under machine.

7. Slide vertical roller bars and flange bearings fromroller shaft ends.

8. Remove four (4) cap screws and lock nuts that se-cure flange bearings to vertical roller bars. Separatebearings from roller bars.

Roller Installation (Fig. 4)

1. Position flange bearings to vertical roller bars so thatbearing grease fittings will point to front of aerator afterinstallation. Secure bearings to roller bars with four (4)cap screws and lock nuts.

2. Clean roller shaft ends and apply antiseize lubricantto shaft ends. Slide vertical roller bar and flange bearingassemblies onto roller shaft ends. Do not tighten setscrews in bearings at this time.

CAUTION

Toprevent personal injury,makesure that rolleris supported as it is installed to the machine.

3. Position rollerwith vertical roller bars and flangebea-rings under raised aerator.

4. Start engine on tractor. Slowly lower aerator to posi-tion aerator frame to roller assembly.Stop tractor engineand remove key from the ignition switch.

5. Align holes in vertical roller bars with holes in aeratorframe. Make sure that bearing grease fittings point tofront of aerator. Secureboth roller bars to framewith four(4) cap screws and lock nuts.

6. Check that roller is free to rotate and no binding ex-ists. Center roller between bearings.

7. Tighten two (2) set screws to secure each bearinglocking collar to roller shaft.

8. Lubricate grease fittings on bearings.

1. Bearing2. Bearing housing (4 bolt)

3. Set screw (2 used)4. Grease fitting

Figure 5

1

3

42

Chassis


PTO Driveshaft

1. Gearbox2. Driveshaft shield access panel3. PTO driveshaft shield

4. Flat washer (4 used)5. Lock washer (4 used)

6. Cap screw (4 used)7. PTO driveshaft

Figure 6

FRONT

RIGHT

PROCORE SR54 SHOWN

23

6

1

5

4

7

CAUTION

The friction clutch on the PTO driveshaft maybecome hot during use. To prevent personal in-jury, make sure that clutch has cooled beforeperforming any service on the driveshaft.

Removal (Fig. 6)

1. Position aerator on a firm, level surface. If attachedto tractor, disengage PTO, apply tractor parking brake,stop engine and remove key from the ignition switch.

2. Unhook driveshaft shield safety chains from the trac-tor and the aerator driveshaft shield.

3. Support PTO driveshaft to prevent it from falling.

4. Separate PTO driveshaft from gearbox input shaft(Fig. 7):

A. Open driveshaft shield access panel to be ableto reach PTO driveshaft coupler.

B. Remove pin and lock nut from PTO driveshaftcoupler at aerator gearbox input shaft.

C. Slide driveshaft coupler from gearbox shaft.

5. SeparatePTOdriveshaft from tractorPTOshaft (Fig.8):

A. Pull back on locking collar to release driveshaftfrom PTO shaft.

B. Slide driveshaft yoke from PTO shaft.

6. Remove driveshaft from machine.

7. If necessary, remove shields from PTO driveshaft.


Installation (Fig. 6)

1. Apply grease to gearbox input shaft and tractor out-put shaft.

2. Install shields to PTO driveshaft if removed.

3. PositionPTOdriveshaft with clutch end toward aera-tor gearbox.

4. Secure PTO driveshaft coupler to gearbox inputshaft (Fig. 7):

A. Align splines of driveshaft coupler with gearboxinput shaft and slide coupler onto shaft.

B. Secure driveshaft coupler to gearbox input shaftwith pin and nut.

C. Close and secure driveshaft shield access pan-el.

5. Secure PTO driveshaft to tractor PTO shaft (Fig. 8):

A. Align splines of driveshaft yoke with tractor PTOshaft and slide yoke onto shaft as far as possible.

B. Pull back on yoke so that locking collar securesdriveshaft to PTO shaft.

C. Check that driveshaft yoke is properly locked bysliding yoke on PTO shaft.

6. Lubricate driveshaft grease fittings.

7. Connect driveshaft shield safety chains to the tractorand the aerator driveshaft shield. Make sure that chainsremain slack when the aerator is raised or lowered.

1. Driveshaft coupler2. Gearbox input shaft

3. Pin4. Nut

Figure 7

1

23

4

1. Driveshaft2. Tractor PTO shaft

3. Locking collar

Figure 8

1

2

3

Chassis


PTO Driveshaft Clutch Service

1. Lock nut2. Inner tube yoke3. Inner tube4. PTO clutch lining5. PTO drive plate6. PTO pressure plate7. PTO clutch inner plate8. Chain9. Flange yoke

10. Shield support11. Shield support12. Bushing13. Roll pin14. Grease fitting (2 used)15. Spring (8 used)16. Pin17. Bolt (8 used)

18. Yoke19. Ball collar kit20. Yoke with tube21. Outer shield22. PTO flange hub23. Inner shield24. Cross and bearing kit25. Nut (8 used)

Figure 9

24

24

2

3

4

4

4

4

5

67

7

8

8

9

10

11

12

13

14

14

15

16

1

25

17

18

19 20

21

22

23

PROCORE SR72 SHOWN

CAUTION

The friction clutch on the PTO driveshaft maybecome hot during use. To prevent personal in-jury, make sure that clutch has cooled beforeperforming any service on the driveshaft.

NOTE: The PTO driveshaft used on SR54, SR54--S,SR70 and SR70--S aerators include two (2) clutch lin-ings and fewer driveshaft components on the aeratorend of the PTO driveshaft (Fig. 10).


Disassembly (Fig. 9)


2. Remove PTO driveshaft from aerator (see PTO Dri-veshaft Removal in this section).

3. Remove eight (8) cap screws (item 17), nuts (item25) and springs (item15) that secure clutch assembly todriveshaft flange yoke.

4. Remove clutch components from driveshaft usingFigure 9 as a guide.

Assembly (Fig. 9)

1. Assemble clutch components to driveshaft usingFigure 9 as a guide.

2. Secure clutch components with eight (8) cap screws(item 17), springs (item 15) and nuts (item 25). Tightennuts so that spring length is 1.125” (28.6 mm) (Fig. 11).

3. Install PTOdriveshaft to aerator (seePTODriveshaftInstallation in this section).

IMPORTANT: DONOTovertighten nuts that tensionclutchspringsasPTO. If nutsareovertightened,dri-veshaft damage may occur.

4. After installation is complete, check that clutch doesnot slip. If clutch is slipping, tighten nuts equally in 1/4turn increments until clutch slippage ceases.

1. PTO pressure plate2. PTO clutch lining

3. PTO flange hub4. Flange yoke

Figure 10

2

3

4

1

2

PROCORE SR54 SHOWN

1. Cap screw2. Spring

3. Nut4. Flange yoke

Figure 11

1

2

4

3

1.125” (28.6 mm)

Chassis


PTO Driveshaft Cross and Bearing Service

1. Remove PTO driveshaft from aerator (see PTO Dri-veshaft Removal in this section).

2. If necessary, separate PTO driveshaft and removeshields.

IMPORTANT: When placing yoke in vise, clamplightly on the solid part of the yoke to prevent yokedamage. Also, the use of a visewith soft jaws is rec-ommended.

3. Lightly clamp yoke in vise with soft jaws. Removesnap rings that secure bearings in each yoke. Removeyoke from vise.

IMPORTANT: To prevent damage to driveshaftyokes, support yokeswhen removing and installingbearings.

4. Use a press to remove cross and bearings fromyokes:

A. Place a small socket against one bearing and alarge socket against the yoke on the opposite side.

B. While supporting the large socket, apply pres-sure on small socket to partially push the oppositebearing into the large socket.

C. Remove yoke from press, grasp partially re-moved bearing and tap on yoke to completely re-move the bearing.

D. Repeat process for remaining bearings.

E. Thoroughly clean and inspect all components.

5. To install new cross and bearings:

A. Apply a coating of grease to bearing bores of endyoke and shaft yoke. Also, apply grease to bearingsand seal of bearing assembly. Make sure that allbearing rollers are properly seated in bearing cage.

B. Press one bearing partially into yoke.

IMPORTANT: Take care when installing crossinto bearing to avoid damaging bearing seal.

C. Carefully insert cross into bearing and yoke.

D. Hold cross in alignment and press bearing in untilit hits the yoke.

E. Carefully place second bearing into yoke boreand onto cross shaft. Press bearing into yoke.

F. Install snap rings to secure bearings in place.

G. Repeat procedure for other yoke.

H. Greasecross until grease comesout of all four (4)bearing cups.

6. Make sure that assembled joint moves without bind-ing. Slight binding can usually be eliminated by lightlyrapping the yoke lugs with a soft faced hammer. If bind-ing continues, disassemble joint to identify source ofbinding.

7. If driveshaft was separated for cross and bearingservice, install shields and assemble driveshaft halves.

8. Install PTOdriveshaft to aerator (seePTODriveshaftInstallation in this section).

1. End yoke2. Cross and bearing kit

3. Snap ring (4 used)4. Shaft yoke

Figure 12

1

2

3

4

3



Chassis


Covers (ProCore SR54, SR54--S, SR70 and SR70--S)

Figure 131. Rear hood2. Cap screw (2 used)3. Latch (2 used)4. Cap screw (4 used)5. RH screen6. LH screen

7. Lock washer (6 used)8. Foam strip (2 used)9. Spacer (2 used per screen)10. Cap screw (4 used)11. Screen clip (2 used)

12. Flat washer (10 used)13. Lock nut (4 used)14. Cap screw (2 used)15. Socket head screw (4 used)16. Lock nut (4 used)

PROCORE SR54 SHOWN

FRONT

RIGHT

2

3

6

8

9

10

11

13

1

57

12

14

15

16

4

10

12

12

12

13

3

11

NOTE: The covers used on the ProCore SR54,SR54--S, SR70 and SR70--S are very similar. The pro-cedure for removal and installation of the covers is thesame on these models. The ProCore SR54 is shown inFigure 13.


Removal (Fig. 13)


2. If necessary, remove rear hood:

A. Unlatch rear hood.

B. Remove two (2) cap screws (item 2) that securerear hood to frame.

C. Remove rear hood from machine.

3. To remove front screen (item 5 or 6):

A. Unlatch, raise and support rear hood if it is at-tached to frame.

B. Support front screen to prevent it from falling.

C. Remove cap screw, lock nut and two (2) flatwashers that secure front screen to screen clip (item11).

D. Remove cap screw, lock washer and flat washerthat secure front screen to frame.

E. Remove two (2) cap screws and flat washers thatsecure front screen to frame. Retrieve two (2)spacers (item 9) from between screen and frame.

F. Remove front screen from machine.


1. Make sure that screen clip (item 11) is secured toframe.

2. To install front screen (item 5 or 6):

A. Position front screen to machine.

B. Place two (2) spacers (item 9) between screenand frame. Install two (2) cap screws and lock wash-ers to secure front screen to frame.

C. Secure front screen to screen clip (item 11) withcap screw, lock nut and two (2) flat washers.

D. Secure front screen tab to frame with cap screw,lock washer and flat washer.

3. If removed, secure rear hood tomachinewith two (2)cap screws (item 18).

4. Lower and secure rear hood.

Chassis


Covers (ProCore SR72)

Figure 141. Rear hood2. RH screen3. LH screen4. Foam strip (2 used)5. Spacer (4 used)6. Top screen clip (2 used)

7. Front screen bracket (2 used)8. Cap screw (8 used)9. Cap screw (8 used)10. Socket head screw (4 used)11. Lock nut (4 used)

12. Latch (2 used)13. Cap screw (2 used)14. Flat washer (12 used)15. Lock washer (8 used)16. Lock nut (8 used)

PROCORE SR72 SHOWN

FRONT

RIGHT2

3

6

8

9

1011

13

1

5

7

1214

15

16

4

12

7

14

14

6

16

15

159

9

8


Removal (Fig. 14)


2. If necessary, remove rear hood:

A. Unlatch rear hood.

B. Remove two (2) cap screws (item 13) that se-cure rear hood to frame.

C. Remove rear hood from machine.

3. To remove front screen (item 2 or 3):

A. Unlatch, raise and support rear hood if it is at-tached to frame.

B. Support front screen to prevent it from falling.

C. Remove cap screws and lock washers that se-cure top screen clip (item6) and front screen bracket(item 7) to frame.

D. Remove two (2) cap screws and lock washersthat secure front screen to frame channels. Retrievetwo (2) spacers (item 5) from between screen andframe.

E. Remove front screen from machine.

4. If necessary, remove top screen clip (item 6) andfront screen bracket (item 7) from front screen.


1. If removed, secure top screen clip (item 6) and frontscreen bracket (item 7) to front screen.

2. To install front screen (item 2 or 3):

A. Position front screen to machine.

B. Place two (2) spacers (item 5) between screenand frame. Install two (2) cap screws and lock wash-ers to secure front screen to frame channels.

C. Secure top screen clip (item 6) and front screenbracket (item 7) to frame with cap screws and lockwashers.

3. If removed, secure rear hood tomachinewith two (2)cap screws (item 13).

4. Lower and secure rear hood.

Chassis

ProCore SR Series Page 4 -- 1 Coring Head (SR54 & SR70)

Chapter 4

Coring Head (SR54 & SR70)Table of ContentsSPECIFICATIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .GENERAL INFORMATION 4. . . . . . . . . . . . . . . . . . . . .Coring Head 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coring Head Adjustments 6. . . . . . . . . . . . . . . . . . . .

SPECIAL TOOLS 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .SERVICE AND REPAIRS 8. . . . . . . . . . . . . . . . . . . . . .Linkage Arm Assemblies 8. . . . . . . . . . . . . . . . . . . . .Connecting Rods 10. . . . . . . . . . . . . . . . . . . . . . . . . . .Coring Crankshaft Bearing Housings 12. . . . . . . . . .Coring Crankshaft (SR54) 16. . . . . . . . . . . . . . . . . . .Coring Crankshaft (SR70) 17. . . . . . . . . . . . . . . . . . .Coring Head Drive Chain 18. . . . . . . . . . . . . . . . . . . .Coring Head Drive Sprockets 20. . . . . . . . . . . . . . . .Gearbox 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gearbox Service 24. . . . . . . . . . . . . . . . . . . . . . . . . . .

CoringHead

(SR54

&SR70)

ProCore SR SeriesPage 4 -- 2Coring Head (SR54 & SR70)

SpecificationsItem Description

ProCore SR54Aerating Width 54 inches (1.37 meters)Number of Connecting Rods 6Number of Rollers 1Depth Adjustment Hydraulic Top LinkGearbox Lubricant Capacity 2 US quart (1.9 liter)Gearbox Weight (approximate) 75 lbs (34 kg)

ProCore SR54--SAerating Width 54 inches (1.37 meters)Number of Connecting Rods 6Number of Rollers 2Depth Adjustment Fixed Top LinkGearbox Lubricant Capacity 2 US quart (1.9 liter)Gearbox Weight (approximate) 75 lbs (34 kg)


ProCore SR70--SAerating Width 73 inches (1.85 meters)Number of Connecting Rods 8Number of Rollers 2Depth Adjustment Fixed Top LinkGearbox Lubricant Capacity 2 US quart (1.9 liter)Gearbox Weight (approximate) 165 lbs (75 kg)

Gearbox Lubricant (all models) SAE 80W--90 gear lube



CoringHead

(SR54

&SR70)


General Information

Coring Head

PROCORE SR54

PROCORE SR70CORING HEAD

CORING HEAD

1

1

2

3

57

46 68

2

3 5

746 68

1. Aerator frame2. Coring crankshaft assembly3. Tine holder

4. Connecting rod5. Linkage arm assembly6. Drive chain sprocket

7. Crank arm8. Bearing holder

Figure 1


The coring head of a ProCore SR deep tine aerator con-sists of the aerator frame, a coring crankshaft assembly,tine holders and aerating tines. The rotating crankshaftassembly operates a number of connecting rods withlinkage arm assemblies to provide effective tine motionfor deep turf aeration. The SR54 and SR70 aeratorframes pivot on a single roller to allow aerating depthcontrol. The SR54--S and SR70--S aerators areequipped with dual rollers.

Drive for the coring head is provided by the towing trac-tor PTO output shaft. A gearbox on the ProCore aeratoris rotated by a driveshaft connected to the tractor PTOshaft. The aerator gearbox provides rotation for the cor-ing head crankshaft assembly with two (2) drive chains.The drive chains are each tensioned by an adjustableidler sprocket.

The coring crankshaft is composed of multiple crankarms, bearings, bearing housings and crank pins. Thecrankshaft assembly is designed and assembled to en-sure minimal vibration during aerator operation.

A variety of tines and tine heads are available for use onProCore SR Series aerators. Refer to the Operator’sManual for available options.

CoringHead

(SR54

&SR70)


Coring Head Adjustments

See Operator’s Manual for adjustment procedures forthe coring head on your ProCore SR series aerator.

CAUTION

Never work on the aerator with the tow tractorPTO engaged or engine running. Always disen-gage the PTO, stop tractor engine, remove keyfrom the ignition switch and wait for all machinemovement to stopbeforeperforminganyserviceto aerator components.


Special ToolsOrder special tools from your Toro Distributor.

Crankshaft Nut Wrench

Use to removeand install thehexnuts that securecoringhead crankshaft crank arms and connecting rods.

Toro Part Number: TORxxxx

Figure 2

CoringHead

(SR54

&SR70)


Service and Repairs

Linkage Arm Assemblies

1. Cap screw2. Outer bushing3. Cap screw4. Linkage arm5. Cap screw6. Outer bushing7. Ball bearing8. Outer bushing9. Connecting rod10. Linkage spacer

11. Rubber bumper12. Rubber bumper13. Lock nut14. Lock nut15. Rear spring bracket16. Rear spool assembly17. Cap screw18. Lock nut19. Spring assembly

20. Rear spring spool21. Head spacer22. Flange bushing23. Cap screw24. Tine head25. Set screw26. Head spool27. Lock nut28. Head bumper

Figure 3

2

3

6

8

9

1011

13

1

5

7

1214

15

16

17

18

19

20

4

3

4

67

14

13

PROCORE SR54 SHOWN

2

21

22

23

24

25

26

27

28

22

FRONT

RIGHT

265 ft--lb(359 N--m)


NOTE: The linkage arm assemblies for ProCore SR54and SR70 aerators are very similar. The ProCore SR54linkage arm assembly is shown in Figure 3. The tinehead assembly used on ProCore SR70 is shown in Fig-ure 4.



2. Remove linkage arm components as needed usingFigures 3 and 4 as guides.

3. If necessary, disassemble rear spool assembly us-ing Figure 5 as a guide.

4. Discard all removed bearings.

Assembly (Fig. 3)

1. If rear spool assembly was disassembled (Fig. 5):

A. Make sure that retaining rings are fully seatedinto grooves in hinge housing.

B. Press a new bearing into one side of the hingehousing until contacts installed retaining ring. Thenpress secondnewbearing intohousing so that it con-tacts first bearing.

C. Insert inner bushing into housing.

D. Press final two (2) new bearings into housing fol-lowing above procedure.

2. If bearings (item7)were removed from linkagearms,press new bearings into arms.

3. Assemble all linkage arm components using Figures3 and 4 as guides.

1. Spring assembly2. Head bumper3. Lock nut4. Flange bushing5. Spring spool6. Bolt7. Cap screw8. Lock washer

9. Set screw10. Head adapter11. Head spacer12. Cap screw13. Head bumper14. Tube15. Head spacer

Figure 4

23

6

8

9

1

5

7

4 3

4

10

11

12

13

5

6

12

1514

8

7

1. Hinge housing2. Bearing3. Retaining ring

4. Inner bushing5. Outer bushing

Figure 5

2

34

1

2

3

5

5

CoringHead

(SR54

&SR70)


Connecting Rods

1. Crank pin2. Cap screw3. Outer bushing4. Retaining ring5. Ball bearing

6. Outer bushing7. Ball bearing8. Retaining ring9. Connecting rod10. Bearing spacer

11. Linkage arm12. Lock nut13. Clipped washer14. Hex nut

Figure 6

FRONT

RIGHT

2

3

6

8910

11

14

1

5

7

12

4

34

5

67

8

13

265 ft--lb(359 N--m)

950 ft--lb(1288 N--m)

ANTISEIZELUBRICANT

PROCORE SR54 SHOWN

IMPORTANT: Before disassembling the coringcrankshaft, label location andorientationof compo-nents that are to be removed. Correct componentlocation and orientation are necessary for properaerator operation.

NOTE: The connecting rod assemblies for ProCoreSR54 and SR70 aerators are very similar. The ProCoreSR54 is shown in Figure 6.


Removal (Fig. 6)


2. Unlatch, open and support rear hood to allow accessto coring crankshaft.

3. Rotate coring crankshaft to allow access to crank pin(item 1) and hex nut (item 14) for connecting rod to beremoved.

4. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), loosen, butdo not remove, hex nut (item 14).

5. Support connecting rod that is to be removed to pre-vent it from falling.

WARNING

As crankshaft components are removed frommachine, the crankshaft will become out of bal-ance and may rotate quickly, creating pinchpoints and potential for personal injury. Be cau-tiouswhendisassembling thecoringcrankshaft.

IMPORTANT: When removing cap screw (item 2)and crank pin (item 13), note orientation for properassembly.

6. For connecting rod that is to be removed, removelock nut (item 12) and cap screw (item 2) that securelower end of connecting rod to linkage arms.

7. For connecting rod that is to be removed, removehexnut (item14), clippedwasher (item13)andcrankpin(item 1) that secure upper end of connecting rod to cor-ing crankshaft.

8. Remove connecting rod fromaerator. Locate and re-trieve outer bushings (items 3 and 6) from both ends ofconnecting rod.

9. If necessary, remove ball bearings, bearing spacerand retaining rings from connecting rod. Discard re-moved bearings.


1. If bearings were removed from upper bore of con-necting rod, install new bearings into upper bore.

A. Install a retaining ring into one of the grooves inupper bore of rod. Make sure that retaining ring isproperly seated in groove.

B. Press first ball bearing into connecting rod boreuntil the bearing contacts the installed retaining ring.

C. Individually, press three more bearings into con-necting rod bore until the bearing contacts the pre-viously installed bearing.

D. After all four (4) bearings have been pressed intoconnecting rod bore, install second retaining ring.Make sure that retaining ring is properly seated ingroove.

2. If bearings were removed from lower bore of con-necting rod, install new bearings into lower bore.

A. Install two (2) retaining rings into the grooves inlower bore of rod. Make sure that retaining rings areproperly seated in grooves.

B. Press a new bearing into one side of the connect-ing rod bore until the bearing contacts installed re-taining ring. Then press second new bearing intobore so that it contacts first bearing.

C. Insert bearing spacer into lower rod bore.

D. Press final two (2) new bearings into housing fol-lowing above procedure. Make sure that bearingspacer is centered in rod bore.

3. Apply antiseize lubricant liberally to crank pin (item1) surface.

4. Place outer bushings (items 3 and 6) to both ends ofconnecting rod.

5. Position connecting rod assembly to coring crank-shaft and linkage arms. Insert crank pin (item 1) throughcrank arms and upper connecting rod bearings. Insertcap screw (item 2) through linkage arms and lower con-necting rod bearings.

6. Slide clipped washer (item 13) onto crank pin (item1) and align washer flat with step in crank arm. Threadhex nut (item 14) onto crank pin.

7. Thread lock nut (item 12) onto cap screw (item 2).

8. Properly torque connecting rod fasteners:

A. Torque lock nut (item 12) on cap screw to 265 ft--lb (359 N--m).

B. Torque hex nut (item 14) on crank pin to 950 ft--lb(1288 N--m).

9. After assembly, rotate coring crankshaft by hand tomake sure that no binding occurs.

10.Lower and secure rear hood.

CoringHead

(SR54

&SR70)


Coring Crankshaft Bearing Housings

1. Lock nut2. Crank pin3. Outer bushing4. Connecting rod5. Hex nut

6. Crank arm7. Retaining ring8. Ball bearing9. Cap screw10. Bearing housing

11. Crankshaft12. Clipped washer13. Crank arm14. Spring pin15. Set screw

Figure 7

FRONT

RIGHT

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

950 ft--lb(1288 N--m)

950 ft--lb(1288 N--m)

950 ft--lb(1288 N--m)

2

3

6

8

910

11

13

1

57

12

14

15

4

3

4

5

5

5

79

12

2

3

3

PROCORE SR54 SHOWN

950 ft--lb(1288 N--m)

IMPORTANT: Before disassembling the coringcrankshaft, label locationandorientationof all com-ponents that are to be removed.Correct componentlocation and orientation are necessary for properaerator operation.

NOTE: The crankshaft bearing housing assemblies forProCore SR54 and SR70 aerators are very similar. TheProCore SR54 is shown in Figure 7.

NOTE: Many of the coring crankshaft components de-pend on proper orientation. Crank pin (item 2) headposition, crank arm (item 13) location on the coringcrankshaft, crank arm (item 13) angle on the crankshaft(item 11), crankshaft (item 11) groove orientation andball bearing (item 8) flange direction all need to be cor-rectly placed for proper aerator operation. During bear-ing housing removal, carefully note position ofcomponents to allow proper assembly.


Removal (Fig. 7)


2. Unlatch, open and support back cover to allow ac-cess to coring crankshaft.

3. If bearing housing with drive chain attached is to beremoved, remove coring head drive chain (see CoringHead Drive Chain Removal in this section).

4. Rotate coring crankshaft to allow access to hex nuts(item 5) that secure crank arms and connecting rods onboth sides of crankshaft bearing housing that is to be re-moved.

5. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), loosen, butdo not remove, hex nuts (item 5) that secure crank armsand connecting rods onboth sides of crankshaft bearinghousing that is to be removed.

WARNING


IMPORTANT: When removing crank pin (item 2),noteorientationof crankpinhead for proper assem-bly.

6. Remove crank pins and connecting rods on bothsidesof bearinghousing that is to be removed (seeCon-necting Rod Removal in this section).

7. Support bearing housing assembly to prevent it fromfalling. Remove two (2) cap screws and lock nuts thatsecure bearing housing assembly to coring head frame.Remove bearing housing assembly from machine.

8. Disassemble bearing housing assembly:

IMPORTANT: The crank arms on either side of abearing housing are different. Before bearing hous-ingdisassembly,makesure tonote location andori-entation of crank arms.

A. Note crank arm alignment with each other for as-sembly purposes. Incorrect alignment of crank armswill prevent smooth aerator operation andwill lead toaerator damage. If desired, use a marker to make adiagonal line across the bearing housing and crankarms for assembly purposes.

B. Remove hex nuts (item5) that secure crank armsto crankshaft.

C. Slide crank arms (items 6 and 13) from crank-shaft.

D. If sprocket is attached to removed crank arm, re-move sprocket if necessary (Fig. 8).

E. Loosen set screws (item 15) that secure bearingto crankshaft.

F. Slide crankshaft from bearing housing. Note ori-entation of grooves in crankshaft for assembly pur-poses.

G. If necessary, remove retaining rings and bearingfrom bearing housing. Note orientation of bearingflange for assembly purposes. Discard bearing if re-moved from housing.

9. If necessary, remove and discard spring pins (item14).

1. Sprocket2. Spacer (4 used)3. Crank arm

4. Lock washer (4 used)5. Cap screw (4 used)

Figure 8

2

3

4

1

5

CoringHead

(SR54

&SR70)



1. If bearingwas removed frombearing housing, installnew bearing into housing:

A. Install a retaining ring into one of the grooves inbearing housing. Make sure that retaining ring isproperly seated in groove.

B. Position bearing to bearing housing so bearingflange orientation is correct. Install new bearing intobearing housing by pressing on outer race of bear-ing.

C. Install second retaining ring into bearing housinggroove to secure bearing. Make sure that retainingring is properly seated in groove.

2. If spring pins (item 14) were removed from frame,drive new spring pins into aerator frame holes.

3. Install components into bearing housing assembly:

A. If either of the removed crank arms included adrive sprocket, install sprocket if it was removed (Fig.8).

B. Apply antiseize lubricant liberally to crankshaft(item 11). Noting orientation of crankshaft groovesfrom disassembly, slide crankshaft into bearinghousing. Do not tighten bearing set screws (item 15)at this time.

C. Using notes made during disassembly, properlyorientate crank arms (items 6 and 13) and slide ontocrankshaft.

D. Install hex nuts onto crankshaft threads to securecrank arms to crankshaft.

4. Position bearing housing assembly to spring pins onaerator frame. Install two (2) cap screws and lock nutsto secure bearing housing assembly to coring headframe.

5. Install crank pins and connecting rods on both sidesof bearing housing (see Connecting Rod Installation inthis section).

6. Rotate coring crankshaft to allow access to hex nuts(item 5) that secure crank arms and connecting rods onboth sides of crankshaft bearing housing.

7. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), fully tightenhex nuts (item5) that secure crank arms and connectingrods on both sides of crankshaft bearing housing.Torque hex nuts (item 5) to 950 ft--lb (1288 N--m).

8. Tighten set screws (item 15) to secure ball bearingflange to crankshaft.


IMPORTANT: When installing coring head drivechains,make sure that one of the chains is installedand properly tensioned. Then, position coringcrankshaft as described inCoringHeadDriveChainInstallation in this section before installing secondchain.

10.If removed, install coring head drive chain (see Cor-ing Head Drive Chain Installation in this section). Makesure that coring crankshaft is properly positioned beforeinstalling drive chain and also that chain is properly ten-sioned after installation.

11.Lower and secure back cover.



CoringHead

(SR54

&SR70)


Coring Crankshaft (SR54)

1. Crank arm (2 used)2. Crank arm (2 used)

3. Crank arm (5 used) 4. Crank arm (3 used)Figure 9

PROCORE SR54CORING CRANKSHAFT(VIEWED FROM REAR)

21

43

1

3

4

2

3 3

34

The ProCore SR54 coring crankshaft uses four (4) dif-ferent crank arms. For identification purposes, the crankarms and crankshaft timing are shown in Figure 9.


Coring Crankshaft (SR70)

1. Crank arm (2 used) 2. Crank arm (13 used) 3. Crank arm (1 used)

Figure 10


21

1

2

2

32

2

2 2

2

The ProCore SR70 coring crankshaft uses three (3) dif-ferent crank arms. For identification purposes, the crankarms and crankshaft timing are shown in Figure 10. C

oringHead

(SR54

&SR70)


Coring Head Drive Chain

1. Cap screw2. Cap screw3. Idler sprocket4. Offset spacer5. Lock nut

6. Idler bracket7. Lock nut8. Idler rod9. Drive chain

10. Master link assembly11. Idler bracket12. Gearbox13. Gearbox sprocket

Figure 11

PROCORE SR54 SHOWN

FRONT

RIGHT

2

3

6

8

9

1011

13

1

5

7

12

4

1

2

34

5

7

78

13

910

NOTE: Thecoringheaddrive chainassemblies forPro-CoreSR54andSR70aerators are very similar. ThePro-Core SR54 is shown in Figure 11.



2. Raise and support rear hood.

3. Remove front screens (see Covers Removal in theService and Repairs section of Chapter 3 -- Chassis).

4. Loosen cap screw (item2) and lock nut (item5) to re-move idler tension on drive chain.

5. Rotate coring crankshaft until drive chainmaster linkis located at gearbox sprocket. Note direction of closedend of master link clip for assembly purposes. Removeclip andmaster link fromdrive chain. Locate and removemaster link O--rings.

6. Removedrive chain fromgearbox, coring crankshaftand idler sprockets (Fig. 12).

7. If necessary, remove idler assembly using Figure 11as a guide.

8. If necessary, remove sprocket(s) from gearbox shaft(see Coring Head Drive Sprockets Disassembly in thissection).


9. If sprocket removal from coring crankshaft is neces-sary, remove coring crankshaft bearing housing that in-cludes sprocket and remove sprocket from crank arm(see Coring Crankshaft Bearing Housing Removal inthis section).

Assembly (Fig. 11)

1. If coring crankshaft sprocket was removed, securesprocket to crankarmand install coring crankshaft bear-ing housing (see Coring Crankshaft Bearing HousingInstallation in this section).

2. If sprockets were removed from gearbox shaft,install sprockets to gearbox shaft (see Coring HeadDrive Sprockets Assembly in this section).

3. If idler assembly parts were removed from frame,install idler components using Figure 11 as a guide.

4. Using a suitable straight edge, check that alignmentbetween gearbox, coring crankshaft and idler sprocketsis correct. If needed, adjust sprocket location on gear-box shaft to align sprockets (see Coring Head DriveSprockets Assembly in this section).

IMPORTANT: When installing drive chains, installand properly tension one of the drive chains. Then,position coring crankshaft as described below be-fore installing second chain.

5. If both drive chains were removed, install first chain:

A. Position one of the drive chains to gearbox, cor-ing crankshaft and idler sprockets (Fig. 12).

B. Apply grease to master link O--rings. Place two(2) O--rings on master link pins and install into endsof drive chain. Place final two (2) O--rings on masterlink pins and install side plate. Install clip so that theclosed end is facing the direction of chain rotation.

IMPORTANT: To prevent gearbox damage, donot overtighten drive chains. Drive chainsshould have 1/2” (12.7mm) total deflection whenproperly adjusted.

C. Adjust idler sprocket location with lock nut (item5) so that chain has 1/2” (12.7mm) total deflection atmid--span between sprockets. Make sure that capscrew (item 2) is fully tightened after chain adjust-ment is completed.

6. Rotate coring crankshaft to the following position be-fore installing second drive chain:

A. OnSR54aerators, position#3head to thebottomof the stroke and align #4 and #5 heads (Fig 13).

B. OnSR70aerators, position#4head to thebottomof the stroke and align #5 and #6 heads (Fig 14).

7. Install and adjust second drive chain using proce-dure listed in step 5 above.

8. Install front screens tomachine (seeCovers Installa-tion in the Service and Repairs section of Chapter 3 --Chassis).

9. Lower and secure rear cover.

1. Drive chain2. Idler rod

3. Lock nut4. Cap screw

Figure 12

2

1

3

4

Figure 13

BOTTOM OFSTROKE ALIGN

PROCORE SR54

Figure 14

BOTTOM OFSTROKE

ALIGN

PROCORE SR70CoringHead

(SR54

&SR70)


Coring Head Drive Sprockets

1. Cap screw2. Cap screw3. Idler sprocket4. Offset spacer5. Lock nut6. Idler bracket7. Lock nut

8. Idler rod9. Cap screw (3 used per hub)10. Lock washer (3 used per hub)11. Set screw12. Sprocket hub13. Gearbox sprocket14. Square key

15. Gearbox16. PTO driveshaft shield17. Master link assembly18. Drive chain19. Cap screw (4 used)20. Lock washer (4 used)21. Idler bracket

Figure 15

PROCORE SR54 SHOWN

FRONT

RIGHT

2

3

6

8910

11

13

1

5

7

12

1415

1617

18

19

20

4

1

2

34

5

21

7

78

NOTE: The coring head drive sprockets used on Pro-CoreSR54andSR70aerators are very similar. ThePro-Core SR54 is shown in Figure 15.






4. Remove drive chains (see Coring Head Drive ChainDisassembly in this section).

5. Remove sprocket(s) from gearbox shaft:

A. Measure distance from end of gearbox outputshaft to location of sprocket hub for assembly pur-poses. Record measurement.

B. Remove three (3) cap screws and lock washersthat secure sprocket to sprocket hub.

IMPORTANT: Excessive or unequal pressure onthe cap screws can break the sprocket hubflange.When removing sprocket fromhub, tight-en screws progressively and evenly.

C. Insert three (3) cap screws into threaded removalholes of the sprocket hub. Tighten screws progres-sively and evenly until the sprocket is loose on thehub. Position sprocket away from hub.

D. Remove set screw that secures sprocket hub togearbox shaft.

E. Remove hub, sprocket and square key fromgearbox shaft.


Assembly (Fig. 15)


2. Install sprockets to gearbox shaft:

A. Make sure that tapered surfaces of sprocket andsprocket hub are thoroughly clean (no oil, grease,dirt, rust, etc.).

B. Position square key in gearbox shaft slot. Applyantiseize lubricant to bore of sprocket hub.

C. Slide sprocket and hub onto gearbox shaft mak-ing sure that tapered surfaces of sprocket and hubalign.

D. Position hub location from end of gearbox shaftasmeasuredbefore removal.Securehub togearboxshaft with set screw.

IMPORTANT: When securing sprocket andsprocket hub, tighten cap screws in three (3)equal steps and in a circular pattern to preventhub flange damage.

E. Align threaded holes of sprocket with non--threaded holes of sprocket hub and install three (3)cap screwswith lockwashers. Tighten cap screws inthree (3) equal steps and in a circular pattern to se-cure sprocket and sprocket hub.

3. Using a suitable straight edge, check that alignmentbetween gearbox, coring crankshaft and idler sprocketsis correct. If needed, readjust sprocket location on gear-box shaft to align sprockets.

4. Install and tension drive chains (see Coring HeadDrive Chain Assembly in this section).



1. Drive chain2. Jam rod

3. Lock nut4. Cap screw

Figure 16

2

1

3

4

CoringHead

(SR54

&SR70)


Gearbox

1. Cap screw2. Cap screw3. Idler sprocket4. Offset spacer5. Lock nut6. Idler bracket7. Lock nut8. Idler rod

9. Cap screw (3 used per hub)10. Lock washer (3 used per hub)11. Set screw12. Sprocket hub13. Gearbox sprocket14. Square key15. Gearbox16. Flat washer (4 used)

17. Lock washer (4 used)18. Cap screw (4 used)19. PTO driveshaft shield20. Master link assembly21. Drive chain22. Cap screw (4 used)23. Lock washer (4 used)24. Idler bracket

Figure 17

PROCORE SR54 SHOWN

FRONT

RIGHT

2

3

6

8910

11

13

1

5

7

12

1415

1617

18

1920

4

1

2

34

5

21

7

78

22

23

24

NOTE: Gearbox installation on ProCore SR54 andSR70 aerators is very similar. The ProCore SR54 isshown in Figure 17.


Removal (Fig. 17)


2. Remove screens from aerator frame (see CoversRemoval in the Service and Repairs section of Chapter3 -- Chassis).

3. Drain lubricant from gearbox.

4. Disconnect PTO driveshaft from gearbox input shaft(see PTO Driveshaft Removal in the Service and Re-pairs section of Chapter 3 -- Chassis).

5. Remove four (4) cap screws, lock washers and flatwashers that secure driveshaft shield (item 19) to gear-box. Remove shield.

6. Remove drive chains from gearbox sprockets (seeCoring Head Drive Chain Disassembly in this section).

7. Remove drive sprocket and sprocket hub from bothgearbox output shafts (see Coring Head Drive Sprock-ets Disassembly in this section).

8. On SR70 aerators, remove saddle bolts and locknuts that securegearbox flanges toaerator framebrack-ets (Fig. 18).

9. Remove four (4) cap screws and lock washers thatsecure gearbox to aerator frame.

CAUTION

To prevent personal injury, make sure that gear-box is supported as it is removed from the ma-chine. See Specifications in this chapter forapproximate gearbox weight.

10.Carefully remove gearbox from machine.


CAUTION

To prevent personal injury, make sure that gear-box is supportedas it is installed to themachine.See Specifications in this chapter for approxi-mate gearbox weight.

1. Position gearbox to aerator frame. Secure gearboxto frame with four (4) cap screws and lock washers.

2. On SR70 aerators, secure gearbox flanges to aera-tor frame brackets with bolts and lock nuts (Fig. 18).

3. Install sprocket and sprocket hub to both gearboxoutput shafts (seeCoringHeadDriveSprocketsAssem-bly in this section).

4. Install both drive chains (see Coring Head DriveChain Assembly in this section). Make sure that drivechain is properly adjusted after assembly.

5. Position driveshaft shield (item 19) to gearbox andsecure with four (4) cap screws, lock washers and flatwashers.

6. Connect PTO driveshaft to gearbox input shaft (seePTO Driveshaft Installation in the Service and Repairssection of Chapter 3 -- Chassis).

7. Fill gearbox with proper lubricant (see Operator’sManual).

8. Install screens to aerator (see Covers Installation inthe Service and Repairs section of Chapter 3 -- Chas-sis).

1. Gearbox2. Saddle bolt (8 used)

3. Lock nut (8 used)

Figure 18

12

32

3

FRONTPROCORE SR70

CoringHead

(SR54

&SR70)


Gearbox Service

1. Oil seal2. Retaining ring3. Shim package4. Shim package5. Bearing (cup and cone)

6. Output shaft7. Relief vent8. Bearing9. Housing10. Retaining ring

11. Bearing12. Cover plate13. Input gear and shaft14. Bearing (cup and cone)

Figure 19

2

3

6

8

9

10

11

13

1

5

7

12

14

4

1

1

10

ProCore SR Series Page 5 -- 1 Coring Head (SR72)

Chapter 5

Coring Head (SR72)Table of ContentsSPECIFICATIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .GENERAL INFORMATION 4. . . . . . . . . . . . . . . . . . . . .Coring Head 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Coring Head Adjustments 5. . . . . . . . . . . . . . . . . . . .

SPECIAL TOOLS 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .SERVICE AND REPAIRS 6. . . . . . . . . . . . . . . . . . . . . .Linkage Arm Assemblies 6. . . . . . . . . . . . . . . . . . . . .Connecting Rods 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .Coring Crankshaft Bearing Housings 10. . . . . . . . . .Coring Crankshaft 14. . . . . . . . . . . . . . . . . . . . . . . . . .Coring Head Drive Chain 16. . . . . . . . . . . . . . . . . . . .Coring Head Drive Sprockets 18. . . . . . . . . . . . . . . .Gearbox 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gearbox Service 22. . . . . . . . . . . . . . . . . . . . . . . . . . .

CoringHead

(SR72)

ProCore SR SeriesPage 5 -- 2Coring Head (SR72)

SpecificationsItem Description


Gearbox Lubricant (all models) SAE 80W--90 gear lube



CoringHead

(SR72)


General Information

Coring Head

1. Aerator frame2. Coring crankshaft assembly3. Tine holder

4. Connecting rod5. Linkage arm assembly

6. Drive chain sprocket7. Crank arm

Figure 1

PROCORE SR72CORING HEAD 4

5

2

3

6

1

86

7

The coring head of a ProCore SR deep tine aerator con-sists of the aerator frame, a coring crankshaft assembly,tine holders and aerating tines. The rotating crankshaftassembly operates a number of connecting rods withlinkage arm assemblies to provide effective tine motionfor deep turf aeration. TheSR72 aerator frame pivots ona single roller to allow aerating depth control.

Drive for the coring head is provided by the towing trac-tor PTO output shaft. A gearbox on the ProCore aeratoris rotated by a driveshaft connected to the tractor PTOshaft. The aerator gearbox provides rotation for the cor-ing head crankshaft assembly with two (2) drive chains.The drive chains are each tensioned by an adjustableidler sprocket.

The coring crankshaft is composed of multiple crankarms, bearings, bearing housings and crank pins. Thecrankshaft assembly is designed and assembled to en-sure minimal vibration during aerator operation.

A variety of tines and tine heads are available for use onProCore SR Series aerators. Refer to the Operator’sManual for available options.


Coring Head Adjustments

See Operator’s Manual for adjustment procedures forthe coring head on your ProCore SR series aerator.

CAUTION

Never work on the aerator with the tow tractorPTO engaged or engine running. Always disen-gage the PTO, stop tractor engine, remove keyfrom the ignition switch and wait for all machinemovement to stopbeforeperforminganyserviceto aerator components.

Special ToolsOrder special tools from your Toro Distributor.

Crankshaft Nut Wrench

Use to removeand install thehexnuts that securecoringhead crankshaft crank arms and connecting rods.

Toro Part Number: TORxxxx

Figure 2

CoringHead

(SR72)


Service and Repairs

Linkage Arm Assemblies

1. Cap screw2. Flat washer3. Outer bushing4. Linkage arm spacer5. Wrist pin6. Connecting rod assembly7. Flange nut8. Rear spring post

9. Cap screw10. Cap screw11. Linkage arm12. Outer bushing13. Spring assembly14. Wrist pin15. Cap screw16. Front spring holder

17. Tine head bolt18. Tine head assembly19. Bumper pad20. Camber bracket21. Lock nut22. Lock nut23. Lock nut24. Hinge assembly

Figure 3

PROCORE SR72 SHOWN

FRONT

RIGHT

2

3

6

89

10

1113

1 5

7

12

1415

181920

4

3

7

7

7

8

9

16 172122

23

24

11

13

16

33

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

300 ft--lb(407 N--m)

300 ft--lb(407 N--m)

300 ft--lb(407 N--m)




CAUTION

Be careful when removing the spring assembly.Thespring isunder loadandmaycausepersonalinjury during removal.

2. Remove both spring assemblies from rear springpost (item 8) and front spring holder (item 16).

3. Remove linkage arm components as needed usingFigure 3 as a guide.

4. If necessary, disassemble tine head assembly usingFigure 4 as a guide.

5. If necessary, disassemble hinge assembly usingFigure 5 as a guide.

6. Discard all removed bearings.

Assembly (Fig. 3)

1. If tine head (Fig. 4) or hinge (Fig. 5) assemblies weredisassembled:

A. Make sure that retaining rings are fully seatedinto grooves in housing.

B. Press a new bearing into one side of the housinguntil it contacts installed retaining ring. Then presssecond new bearing into housing so that it contactsfirst bearing.

C. Insert inner bushing into housing.

D. Press final two (2) new bearings into housing fol-lowing above procedure.

E. Make sure that inner bushing is centered in hous-ing.

2. Apply antiseize lubricant to wrist pins (items 5 and14).

3. Assemble linkage arm components using Figure 3as a guide. Torque flange nuts (item 7) to 300 ft--lb (407N--m).

4. Make sure that spring wires are not broken orcrossed (Fig. 6). Install both spring assemblies to rearspring post (item 8) and front spring holder (item 16).

1. Tine head housing2. Bearing3. Retaining ring


Figure 4

2

3

1

5

4

5 2

3

1. Hinge housing2. Bearing3. Retaining ring


Figure 5

23

1

5

4

2

3

5

1. Spring assembly2. Rear spring post

3. Front spring holder4. Crossed spring wires

Figure 6

32 14

CoringHead

(SR72)


Connecting Rods

1. Connecting rod2. Spacer3. Retaining ring4. Bearing5. Outer bushing6. Linkage arm

7. Flange nut8. Hex nut9. Clipped washer10. Crank arm11. Bearing

12. Retaining ring13. Spacer14. Crank arm15. Crank pin16. Wrist pin

Figure 7

FRONT

RIGHT

PROCORE SR72 SHOWN

23

6

8

9

1011

13

1

5

7

12

14 15

16

4

3

45

6

7

11

12

ANTISEIZELUBRICANT

ANTISEIZELUBRICANT

950 ft--lb(1288 N--m)

300 ft--lb(407 N--m)

300 ft--lb(407 N--m)

IMPORTANT: Before disassembling the coringcrankshaft, label location andorientationof compo-nents that are to be removed. Correct componentlocation and orientation are necessary for properaerator operation.


Removal (Fig. 7)


2. Unlatch, open and support rear hood to allow accessto coring crankshaft.

3. Rotate coring crankshaft to allow access to crank pin(item 15) and hex nut (item 8) for connecting rod to beremoved.

4. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), loosen, butdo not remove, hex nut (item 8).

5. Remove linkagearm fromone sideof connecting rod(see Disassembly of Linkage Arm Assemblies in thissection).

6. Support connecting rod that is to be removed to pre-vent it from falling.

WARNING


IMPORTANT: When removing cap screw (item 2)and crank pin (item 13), note screw or crank pinhead orientation for proper assembly.

7. For connecting rod that is to be removed, removehex nut (item 8), clipped washer (item 9) and crank pin(item15) that secure upper end of connecting rod to cor-ing crankshaft.

8. Remove connecting rod fromaerator. Locate and re-trieveouter bushings (item5) fromsmall endof connect-ing rod.

9. If necessary, remove ball bearings, bearing spacerand retaining rings from connecting rod. Discard re-moved bearings.


1. If bearings were removed from upper bore of con-necting rod, install new bearings into upper bore.

A. Install retaining rings into grooves in upper boreof rod. Make sure that retaining rings are properlyseated in grooves.

B. Insert bearing spacer into rod bore.

C. Press ball bearings into connecting rod bore untilthe bearings contact installed retaining rings.

2. If bearings were removed from lower bore of con-necting rod, install new bearings into lower bore.

A. Install two (2) retaining rings into the grooves inlower bore of rod. Make sure that retaining rings areproperly seated in grooves.

B. Press a new bearing into one side of the connect-ing rod bore until the bearing contacts installed re-taining ring. Then press second new bearing intobore so that it contacts first bearing.

C. Insert bearing spacer into lower rod bore.

D. Press final two (2) new bearings into housing fol-lowing above procedure. Make sure that bearingspacer is centered in rod bore.

3. Apply antiseize lubricant to crank pin (item 15) andwrist pin (item 16).

4. Place outer bushings (item 5) to small end of con-necting rod. Slide lower end of connecting rod ontowristpin.

5. Position connecting rod assembly to coring crank-shaft. Insert crank pin (item 15) through crank arms andupper connecting rod bearings.

6. Slide clippedwasher (item9)onto crankpin (item15)and align washer flat with step in crank arm. Thread hexnut (item 8) onto crank pin.

7. Install removed linkage arm to side of connecting rod(see Assembly of Linkage Arm Assemblies in this sec-tion).

8. Properly torque fasteners:

A. Torque flange nuts (item 7) that secure linkagearm to 300 ft--lb (407 N--m).

B. Torque hex nut (item 8) on crank pin to 950 ft--lb(1288 N--m).


10.Lower and secure rear hood.

CoringHead

(SR72)


Coring Crankshaft Bearing Housings

1. Lock nut2. Hex nut3. Clipped washer4. Crank arm5. Dowel pin bullets

6. Connecting rod assembly7. Crank pin8. Crank arm9. Crankshaft nut10. Locking plate

11. Bearing housing assembly12. Crankshaft13. Crank arm14. Crank arm

Figure 8

FRONT

RIGHT

PROCORE SR72 SHOWN

23

6

8

910

11

13

1

5

7

12

14

4

23

7

10

ANTISEIZELUBRICANT

15

6

5

ANTISEIZELUBRICANT

9

950 ft--lb(1288 N--m)

950 ft--lb(1288 N--m)

1200 ft--lb(1627 N--m)

1200 ft--lb(1627 N--m)

IMPORTANT: Before disassembling the coringcrankshaft, label locationandorientationof all com-ponents that are to be removed.Correct componentlocation and orientation are necessary for properaerator operation.

NOTE: Many of the coring crankshaft components de-pend on proper orientation. Crank pin (item 7) headposition, crank arm location on the coring crankshaft,crank armangle on the crankshaft (item12) and bearinghousing ball bearing (item 11) flange direction all needto be correctly placed for proper aerator operation. Dur-ing bearing housing removal, carefully note position ofcomponents to allow proper assembly.


Removal (Fig. 8)


2. Unlatch, open and support back cover to allow ac-cess to coring crankshaft.

3. If bearing housing with drive chain attached is to beremoved, remove coring head drive chain (see CoringHead Drive Disassembly in this section).

4. Rotate coring crankshaft to allow access to crank-shaft nuts (item 9) and hex nuts (item 2) that securecrank arms and connecting rods on both sides of crank-shaft bearing housing that is to be removed.

5. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), loosen, butdo not remove, nuts (items 2 and 9) that secure crankarms and connecting rods on both sides of crankshaftbearing housing that is to be removed.

WARNING


6. Remove crank pins and connecting rods on bothsidesof bearinghousing that is to be removed (seeCon-necting Rod Removal in this section).

7. Support bearing housing assembly to prevent it fromfalling. Remove two (2) cap screws and lock nuts thatsecure bearing housing assembly to coring head frame.Remove bearing housing assembly from machine.

8. Disassemble bearing housing assembly:

IMPORTANT: The crank arms on either side of abearing housing are different. Before bearing hous-ingdisassembly,makesure tonote location andori-entation of crank arms.

A. Note crank arm alignment with each other for as-sembly purposes. Incorrect alignment of crank armswill prevent smooth aerator operation andwill lead toaerator damage. If desired, use a marker to make adiagonal line across the bearing housing and crankarms for assembly purposes.

B. Remove loosened hex nuts (item 9) and lockingplate (item 10) that secure crank arms to crankshaft.

C. Slide crank arms (items 4 and 13) from crank-shaft. Locate and retrieve four (4) dowel pin bullets(item 5) from each crank arm.

D. If sprocket is attached to either of the removedcrank arms, remove spacer from both sides of bear-ing housing (Fig. 9).

E. If sprocket is attached to removed crank arm, re-move sprocket if necessary (Fig. 10).

F. Loosen set screws that secure bearings to crank-shaft.

G. Slide crankshaft from bearing housing.

H. If necessary, remove retaining rings and bearingfrom bearing housing. Note orientation of bearingflange for assembly purposes. Discard bearing if re-moved from housing.

9. If necessary, remove and discard spring pins frombearing housing.

1. Crank arm2. Spacer3. Bearing housing

4. Crank shaft5. Sprocket6. Crank arm

Figure 9

2

31

54

2

6

1. Sprocket2. Spacer (4 used)3. Crank arm

4. Lock washer (4 used)5. Cap screw (4 used)

Figure 10

2

3

1

54CoringHead

(SR72)



1. If bearingwas removed frombearing housing, installnew bearing into housing:

A. Install a retaining ring into one of the grooves inbearing housing. Make sure that retaining ring isproperly seated in groove.

B. Position bearing to bearing housing so bearingflange orientation is correct. Install new bearing intobearing housing by pressing on outer race of bear-ing.

C. Install second retaining ring into bearing housinggroove to secure bearing. Make sure that retainingring is properly seated in groove.

2. If spring pins were removed from bearing housing,drive new spring pins into housing holes.

3. Install components into bearing housing assembly:

A. If either of the removed crank arms included adrive sprocket, install sprocket if it was removed (Fig.10).

B. Apply antiseize lubricant liberally to crankshaft(item 12). Slide crankshaft into bearing housing. Donot tighten bearing set screws at this time.

C. If sprocket is attached to either of the removedcrank arms, install spacer to both sides of bearinghousing (Fig. 9).

D. Using notes made during disassembly, properlyorientate crank arms (items 4 and 13) and slide ontocrankshaft.

E. Place four (4) dowel pin bullets (item 5) to eachcrank arm.

F. Install hex nuts onto crankshaft threads to securecrank arms to crankshaft.

4. Position bearing housing assembly to aerator frame.Install two (2) cap screws and lock nuts to secure bear-ing housing assembly to coring head frame.

5. Install crank pins and connecting rods on both sidesof bearing housing (see Connecting Rod Installation inthis section).

6. Rotate coring crankshaft to allow access to nuts(items 2 and 9) that secure crank arms and connectingrods on both sides of crankshaft bearing housing.

7. Insert block ofwoodbetween aerator frameand con-necting rod toprevent thecrankshaft from turning.Usingcrankshaft nut wrench (see Special Tools), fully tightennuts (items 2 and 9) that secure crank arms and con-necting rods on both sides of crankshaft bearing hous-ing. Torque hex nuts (item 5) to 950 ft--lb (1288 N--m).

8. Tighten set screws to secure ball bearing flange tocrankshaft.


10.If removed, install coring head drive chain (see Cor-ingHeadDriveAssembly in this section).Makesure thatchain is properly tensioned.

11.Lower and secure back cover.



CoringHead

(SR72)


Coring Crankshaft



5. Crank arm (3 used)

Figure 11

21

4

5

3

1

2

2

3

4

5


TheProCoreSR72coring crankshaft uses five (5) differ-ent crank arms. For identification purposes, the crankarms and crankshaft timing are shown in Figure 11.



CoringHead

(SR72)


Coring Head Drive Chain

1. Idler shaft2. Master link assembly3. Jam nut (grooved)4. Jam nut5. Idler sprocket6. Lock nut7. Sprocket hub8. Cap screw (4 used)9. Sprocket

10. Saddle bolt (10 used)11. Lock washer (4 used)12. Drive chain13. Lock nut (10 used)14. Lock washer15. Gearbox assembly16. Bolt17. Hex nut

18. PTO driveshaft19. Square key20. Driveshaft shield21. Cap screw (4 used)22. Lock washer (4 used)23. Flat washer (4 used)24. Cap screw (3 used per hub)25. Cap screw (3 used per sprocket)

Figure 12

PROCORE SR72 SHOWN

FRONT

RIGHT

3

6

8

9

1011

13

1

712

15

1617

18

1920

4

6

5

54

13

7

9

2122

23

24

25

1414

141424

19

25

1716

2

2

12

FLAT





4. Loosen jam nut (item 3), hex nut (item 17) and bolt(item 16) to remove idler tension on drive chain.

5. Rotate coring crankshaft until drive chainmaster linkis located at gearbox sprocket. Note direction of closedend of master link clip for assembly purposes. Removemaster link from drive chain. Locate and removemasterlink O--rings.

6. Removedrive chain fromgearbox, coring crankshaftand idler sprockets (Fig. 13).

7. If necessary, remove sprocket(s) from gearbox shaft(see Coring Head Drive Sprockets Disassembly in thissection).



9. If necessary, remove idler assembly using Figure 12as a guide.

Assembly (Fig. 12)


2. If sprockets were removed from gearbox shaft,install sprockets to gearbox shaft (see Coring HeadDrive Sprockets Assembly in this section).

3. If idler assembly parts were removed from frame,install idler components using Figure 12 as a guide.Make sure that flat on head of idler shaft (item 1) is posi-tioned toward location of adjustment bolt (item 16). Donot fully tighten grooved jam nut (item 3) at this time.


IMPORTANT: When installing drive chains, installand properly tension one of the drive chains. Then,position coring crankshaft as described below be-fore installing second chain.

5. If both drive chains were removed, install first drivechain:

A. Position one of the drive chains to gearbox, cor-ing crankshaft and idler sprockets (Fig. 13).

B. Apply grease to master link O--rings. Place two(2) O--rings on master link pins and install into endsof drive chain. Place final two (2) O--rings on masterlink pins and install side plate. Install clip so that theclosed end is facing the direction of chain rotation.

IMPORTANT: To prevent gearbox damage, donot overtighten drive chains. Drive chainsshould have 1/2” (12.7mm) total deflection whenproperly adjusted.

C. Adjust idler sprocket location with bolt (item 16)so that chain has 1/2” (12.7 mm) total deflection atmid--span between sprockets. Make sure that jamnut (item3) and bolt (item16) are fully tightened afterchain adjustment is completed.

6. Rotate coring crankshaft to the following position be-fore installing second drive chain:

A. OnSR72aerators, position#3head to thebottomof the stroke and align #4 and #5 heads (Fig 14).

7. Install and adjust second drive chain using proce-dure listed in step 5 above.



1. Drive chain2. Bolt3. Hex nut

4. Gearbox5. Crankshaft sprocket6. Idler sprocket

Figure 13

2

1

3

4

5

6

Figure 14

BOTTOM OFSTROKE ALIGN

PROCORE SR72

CoringHead

(SR72)


Coring Head Drive Sprockets




Figure 15

PROCORE SR72 SHOWN

FRONT

RIGHT

3

6

8

9

1011

13

1

712

15

1617

18

1920

4

6

5

54

13

7

9

2122

23

24

25

1414

141424

19

25

1716

2

2

12

FLAT






4. Remove drive chains (see Coring Head Drive ChainDisassembly in this section).

5. Remove sprocket(s) from gearbox shaft:

A. Measure distance from end of gearbox outputshaft to location of sprocket hub for assembly pur-poses. Record measurement.

B. Remove six (6) cap screws (items 24 and 25) andlock washers (item 14) that secure sprocket tosprocket hub.

IMPORTANT: Excessive or unequal pressure onthe cap screws can break the sprocket hubflange.When removing sprocket fromhub, tight-en screws progressively and evenly.

C. Insert three (3) cap screws into threaded removalholes of the sprocket hub. Tighten screws progres-sively and evenly until the sprocket is loose on thehub. Position sprocket away from hub.

D. Remove set screw that secures sprocket hub togearbox shaft.

E. Remove hub, sprocket and square key fromgearbox shaft.


Assembly (Fig. 15)


2. Install sprockets to gearbox shaft:

A. Make sure that tapered surfaces of sprocket andsprocket hub are thoroughly clean (no oil, grease,dirt, rust, etc.).

B. Position square key in gearbox shaft slot. Applyantiseize lubricant to bore of sprocket hub.

C. Slide sprocket and hub onto gearbox shaft mak-ing sure that tapered surfaces of sprocket and hubalign.

D. Position hub location from end of gearbox shaftasmeasuredbefore removal.Securehub togearboxshaft with set screw.

IMPORTANT: When securing sprocket andsprocket hub, tighten cap screws in three (3)equal steps and in a circular pattern to preventhub flange damage.

E. Align threaded holes of sprocket with non--threaded holes of sprocket hub and install three (3)cap screws (item 24) with lock washers (item 14).Tighten cap screws in three (3) equal steps and in acircular pattern to secure sprocket and sprocket hub.

F. Install and tighten three cap screws (item25)withlock washers (item 14). Tighten cap screws in three(3) equal steps and in a circular pattern


4. Install and tension drive chains (see Coring HeadDrive Chain Assembly in this section).



1. Drive chain2. Bolt3. Hex nut

4. Gearbox5. Crankshaft sprocket6. Idler sprocket

Figure 16

2

1

3

4

5

6

CoringHead

(SR72)


Gearbox




Figure 17

PROCORE SR72 SHOWN

FRONT

RIGHT

3

6

8

9

1011

13

1

712

15

1617

18

1920

4

6

5

54

13

7

9

2122

23

24

25

1414

141424

19

25

1716

2

2

12


Removal (Fig. 17)


2. Remove screens from aerator frame (see CoversRemoval in the Service and Repairs section of Chapter3 -- Chassis).

3. Drain lubricant from gearbox.

4. Disconnect PTO driveshaft from gearbox input shaft(see PTO Driveshaft Removal in the Service and Re-pairs section of Chapter 3 -- Chassis).

5. Remove four (4) cap screws, lock washers and flatwashers that secure driveshaft shield (item 20) to gear-box. Remove shield.

6. Remove drive chains from gearbox sprockets (seeCoring Head Drive Chain Disassembly in this section).

7. Remove drive sprocket and sprocket hub from bothgearbox output shafts (see Coring Head Drive Sprock-ets Disassembly in this section).

8. Remove ten (10) saddle bolts (item10) and lock nuts(item 13) that secure gearbox flanges to frame.

9. Remove four (4) cap screws and lock washers thatsecure gearbox to aerator frame.

CAUTION

To prevent personal injury, make sure that gear-box is supported as it is removed from the ma-chine. Gearbox weighs approximately 215pounds (97 kg).

10.Carefully remove gearbox from machine.


CAUTION

To prevent personal injury, make sure that gear-box is supportedas it is installed to themachine.Gearbox weighs approximately 215 pounds (97kg).

1. Position gearbox to aerator frame. Secure gearboxto frame with four (4) cap screws and lock washers.

2. Install and tighten ten (10) saddle bolts (item 10) andlock nuts (item 13) to frame and gearbox flanges.

3. Install sprocket and sprocket hub to both gearboxoutput shafts (seeCoringHeadDriveSprocketsAssem-bly in this section).

4. Install both drive chains (see Coring Head DriveChain Assembly in this section). Make sure that drivechains are properly adjusted after assembly.

5. Position driveshaft shield (item 20) to gearbox andsecure with four (4) cap screws, lock washers and flatwashers.

6. Connect PTO driveshaft to gearbox input shaft (seePTO Driveshaft Installation in the Service and Repairssection of Chapter 3 -- Chassis).

7. Fill gearbox with proper lubricant (see Operator’sManual).

8. Install screens to aerator (see Covers Installation inthe Service and Repairs section of Chapter 3 -- Chas-sis).

CoringHead

(SR72)


Gearbox Service

1. Housing2. Socket head screw (6 per sleeve)3. Bushing4. Retaining ring5. O--ring6. Oil seal7. Bearing8. Sleeve

9. O--ring10. Retaining ring11. Bearing (cup and cone)12. Cover13. Main shaft14. Cap screw (8 used)15. Gasket

16. Vent plug17. Ring gear18. Input shaft and gear19. Bearing (cup and cone)20. Retaining ring21. Oil seal22. Bearing (cup and cone)

Figure 18

2

3

6

8 9

10

11

13

1

5

7

12

14 1516

17

18

1920

4

21

3

4

5

6

7

8

9

11

10

22

procore-sr-prelim-serv-man.pdf ProCore SR Deep Tine Aerators June, 2009, 2009 PRELIMINARY

Documents

Transcript of procore-sr-prelim-serv-man.pdf ProCore SR Deep Tine Aerators June, 2009, 2009 PRELIMINARY