I–3155–SRevised 07-01-86

Quiet Intra-Vane Type Double Pumps2520V, 3520V, 3525V, 4520V, 4525V & 4535VSeries -20 Design 282/283 Suffix

Overhaul ManualVickers®

Vane Pumps

2

Table of Contents

Section Page

I. IntroductionA. Purpose of Manual 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. General Information 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

II. DescriptionA. General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

III. Principles of OperationA. General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IV. Installation and Operating InstructionsA. Installation Drawings 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. Mounting and Drive Connections 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. Shaft Rotation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. Piping and Tubing 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Hydraulic Fluid Recommendations 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F. Sound Levels 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G. Overload Protection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H. Start-Up 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V. Service and MaintenanceA. Circuit Inspection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. Adding Fluid to the System 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. Adjustments 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. Lubrication 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Replacement Parts 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F. Product Life 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G. Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VI. OverhaulA. Service Tools 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. Unit Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. Disassembly 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. Cleaning 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. Inspection, Repair and Replacement 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F. Assembly 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VII. Start-Up and TestA. Start-Up 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. Test 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

Section I – Introduction

A. Purpose of Manual This manual describes operational characteristics and over-haul information for fixed and variable delivery inline pistontype pumps and motors. The information contained hereinpertains to the latest design series.

B. General Information Related Publications – Service parts information and instal-lation dimensions are not contained in this manual. The partscatalogs and installation drawings listed in Table 1 are avail-able from Vickers.

Model Parts Drawing Installation Drawing

2520V I-3186-S 504000

3520V I-3180-S 504300

3525V I-3187-S 504500

4520V I-3182-S 504600

4525V I-3188-S 504800

4535V I-3176-S 505000

Table 1. Parts and Installation drawings

Model Codes – Variations within each basic model series arecovered in the model code. Table 2 is a breakdown of the modelcodes covering these units. the model code will be stamped intothe cover nameplate. If an older design unit is being updated tothe new 282/283 design, stamp the new design number on thenameplate. Inquiries should always include the complete unitmodel code number as stamped on the nameplate.

Model Code

5 6 7 8 9 10 11 121 2 3 4

1 Special seals

Mineral and fire resistant fluids

2 Pump series

2520 45203520 45253525 4535

3 Quiet intra-vane type

4 SAE delivery USgpm – shaft end

2520V – 12, 14, 17, 213520V – 25, 30, 35, 383525V – 25, 30, 35, 384520V – 42, 50, 604525V – 42, 50, 604535V – 42, 50, 60

5 Port connections

A – SAE 4 bolt flangeB – SAE straight thread at #2 outlet port

6 SAE delivery USgpm – cover end1200 RPM at 100 PSI

2520V – 2, 5, 8, 11, 12, 143520V – 2, 5, 8, 11, 12, 143525V – 12, 14, 17, 214520V – 2, 5, 8, 11, 12, 144525V – 12, 14, 17, 214535V – 25, 30, 35, 38

7 Shaft type

1 – Straight with square key(standard, all models)

86 – Straight with square key (heavyduty, all models except 2520V)

8 #1 Outlet port position

9 #2 Outlet port position

10 Design

11 Rotation (viewed from shaft end)

L – Left handOmit – Right hand

12 Suffix – Industrial design2 – SAE 2 bolt mounting3 – Foot mounting

Table 2. Model code breakdown

4

Section II – Description

A. General The double intra-vane pump with a 282/283 suffix isdesigned to operate at reduced noise levels, but stillmaintain the same reliability, operating characteristics andservice advantages of previous models.

All sound reduction in the 282/283 series pump isaccomplished within the cartridge kit. The ring, vanes, rotorand plate have been redesigned. The pump housing remainsunchanged, thus, existing systems may be upgraded bysimply replacing the cartridge kit. Figure 1 shows the basic282/283 cartridge kit. Note that 12 vanes are assembled intothe machined rotor slots. Previous designed models use 10vanes. Figure 1. -282/-283 basic cartridge kit parts

Section III – Principles of Operation

A. General The operating principle of a vane pump is illustrated inFigure 2. A slotted rotor is splined to the drive shaft andturns inside a cam ring. Vanes are fitted to the rotor slots andfollow the inner surface of the cam ring as the rotor turns.Centrifugal force and pressure under the vanes hold themout against the cam ring. Pumping chambers are formedbetween the vanes and the cam ring and are enclosed bythe two end plates.

The 282/283 series pumps are of a balanced intra-vanedesign (Figure 2). Outlet pressure is constantly applied tothe small intra-vane area of the vane. As the pump vanerotates through the high and low quadrants, outlet pressureis alternately applied to the rest of the under vane area. Thisvarying pressure under the vane reduces wear andincreases pump efficiency.

Pump delivery can be changed by changing the ring orinstalling a new cartridge kit. Table 2 shows availabledelivery options. Cartridge kit part numbers are tabulated inthe parts and service drawings (Table 1).

Figure 2. Vane Pump Operation

Outlet

LowPressureQuadrant

HighPressureQuadrant

SystemPressure

Rotation

Inlet

Rotation

Inlet orOutletPressure

ContinuousOutletPressure

Outlet support platefeeds full loadpressure tointra-vane area atall times.

Holes in rotor segmentsfeed load pressure underfull vane area in pressurequadrant and inlet pressureunder vane area in inletquadrants.

5

Section IV – Installation and Operating Instructions

A. Installation Drawings The installation drawings listed in Table 1 show operatingcharacteristics, installation dimensions and port locations.

B. Mounting and Drive Connections

CAUTION

Pump shafts are designed to be installed incouplings with a slip fit. Pounding can injure thebearings. Shaft tolerances are shown on theinstallation drawing (Table 1).

1. Direct Mounting – A pilot on the pump mountingflange (Figure 3) assures correct mounting and shaftalignment. Make sure the pilot is firmly seated in theaccessory pad of the power source. Care should beexercised in tightening the mounting screws to preventmisalignment.

2. Indirect drive is not recommended for these pumpswithout Vickers engineering approval.

Pilot

Flange

Figure 3. Mounting flange and pilot

C. Shaft Rotation Pumps are assembled for either right hand (clockwise) or lefthand (counterclockwise) shaft rotation as viewed from theshaft end.

CAUTION

Never drive a pump in the wrong direction ofrotation. Seizure will result, necessitatingexpensive repairs.

D. Piping and Tubing1. All pipes and tubing must be thoroughly cleaned

before installation. Recommended methods of cleaning aresand blasting, wire brushing, pickling and power flushingwith clean solvent to remove loose particles.

NOTE

For information on pickling, refer to instructionsheet 1221-S.

2. To minimize flow resistance and the possibility ofleakage, only as many fittings and connections as arenecessary for proper installation should be used.

3. The number of bends in tubing should be kept to aminimum to prevent excessive turbulence and friction of oilflow. Tubing must not be bent too sharply. Therecommended minimum radius for bends is three times theinside diameter of the tube.

E. Hydraulic Fluid RecommendationsGeneral DataFluid in a hydraulic system performs the dual function oflubrication and transmission of power. It constitutes a vitalfactor in a hydraulic system and careful selection of it shouldbe made with the assistance of a reputable supplier. Properselection of fluid assures satisfactory life and operation ofsystem components with particular emphasis on hydraulicpumps. Any fluid selected for use with pumps is acceptablefor use with valves or motors.

Data sheet I-286 for fluid selection is available from VickersTechnical Publications, Troy, Michigan 48084.

Fluid recommendations noted in the data sheet are based onour experience in industry as a hydraulic componentmanufacturer. Where special considerations indicate a needto depart from the recommended fluids or operatingconditions, see your Vickers sales engineer.

CleanlinessThorough precautions should always be observed to insurethat hydraulic system is clean.

1. Clean (flush) entire new system to remove paint,metal chips, welding shot, etc.

2. Filter each change of fluid to prevent introduction ofcontaminants into the system.

3. Provide continuous filtration of fluid to remove sludgeand products of wear and corrosion generated during the lifeof the system.

4. Provide continuous protection of system from entry ofairborne contamination by sealing the system and/or byproper filtration of the air.

5. During usage, proper fluid filling and servicing offilters, breathers, reservoirs, etc., cannot be overemphasized.

6. Thorough precautions should be taken by propersystem and reservoir design to insure that aeration of thefluid will be kept to a minimum.

6

F. Sound LevelsAlthough system noise levels can be reduced by modifyingpump design, fluid conditions also play a major part inreducing system noise levels.

Some of the major factors affecting the fluid conditions thatcause the loudest noises in a hydraulic system are:

1. Very high viscosities at low start-up temperatures cancause pump noise due to cavitation.

2. Running with a moderately high viscosity fluid willimpede the release of entrained air. The fluid will not becompletely purged of such air in the time it remains in thereservoir before recycling through the system.

3. Aerated fluid can be caused by ingestion of airthrough the pipe joints of inlet lines, high velocity dischargelines, cylinder rod packings or by fluid discharging above thefluid level in the reservoir. Air in the fluid causes a noisesimilar to cavitation.

G. Overload ProtectionRelief valve limit pressure in the system to a prescribedmaximum and protect components from excessive pressure.The setting of the relief valve depends on the workrequirements of the system.

H. Start-UpWith a minimum drive speed of 600 RPM, a pump shouldprime almost immediately if provision is made to initiallypurge the air from the system.

Failure to prime within a reasonable time may result indamage due to lack of lubrication. The pump housing mustbe filled with fluid and inlet lines must be tight and free fromair leaks. It may be necessary to crack a fitting on the outletside of the pump to purge air trapped in the system.

Section V – Service and Maintenance

A. Circuit InspectionPeriodic inspection of the fluid condition and tube or pipe lineconnections can save time-consuming breakdowns andunnecessary parts replacement. the following should bechecked regularly:

1. All hydraulic connections must be kept tight. A looseconnection in a pressure line will permit the fluid to leak out.If the fluid level becomes so low as to uncover the inlet pipeopening in the reservoir, extensive damage to the pump canresult. In suction or return lines, loose connections permit airto be drawn into the system resulting in noisy and/or erraticoperation.

2. Clean fluid is the best insurance for long service life.Therefore, the reservoir should be checked periodically fordirt or other contaminants. If the fluid becomes contami-nated, the system should be drained and the reservoircleaned before new fluid is added.

3. Filter elements also should be checked and replacedperiodically. A clogged filter element results in a higherpressure drop. This can force particles through the filterwhich would ordinarily be trapped, or can cause the by-passto open, resulting in a partial or complete loss of filtration.

4. Air bubbles in the reservoir can ruin the pump andother components. If bubbles are seen, locate the source ofthe air and seal the leak.

5. A pump which is running excessively hot or noisy is apotential failure. Should a pump become noisy or over-heated, the machine should be shut down immediately andthe cause of improper operation corrected.

B. Adding Fluid to the SystemWhen hydraulic fluid is added to replenish the system, itshould always be poured through a clean wire screen (200mesh or finer) or preferably pumped through a 10 micron(absolute) filter.

It is important that the fluid be clean and free of any sub-stance which could cause improper operation or wear of thepump or other hydraulic units. Therefore, the use of cloth tostrain the fluid should be avoided to prevent lint getting intothe system.

C. AdjustmentsNo periodic adjustments are required, other than to maintainproper shaft alignment with the driving medium.

D. LubricationInternal lubrication is provided by the fluid in the system.Lubrication of the shaft coupling should be as specified bytheir manufacturers. Coat shaft splines with a dry lubricant(Molycoat or equivalent) to prevent wear.

E. Replacement PartsReliable operation throughout the specified operating rangeis assured only if genuine Vickers parts are used. Sophisti-cated design processes and material are used in themanufacture of our parts.

7

Substitutes may result in early failure. Part numbers areshown in the parts drawings listed in Table 1.

Repair Kits – Commonly replaced parts are usually providedin the form of a kit (Figure 4). It is recommended that all suchparts be replaced with the kit when a unit is overhauled.

CAUTION

Individual cartridge parts ARE NOTinterchangeable with similar parts of previousdesign models. Complete cartridge kits AREinterchangeable with previous designs.

F. Product LifeThe longevity of these products is dependent upon envi-ronment, duty cycle, operating parameters and systemcleanliness. Since these parameters vary from applica-tion to application, the ultimate user must determine andestablish the periodic maintenance required to maximizelife and detect potential component failure.

Rotor, vane andintra-vaneassembledinside ring

InletSupportPlate

Screw

BushingLocation Pin

Ring

OutletSupportPlate

Sealing Ring

Back-upRingand O-ring

Figure 4. Pre-assembled cartridge kit

G. TroubleshootingTable 3 lists the common difficulties experienced with vanepumps and hydraulic systems. It indicates probable causesand remedies for each of the troubles listed.

TROUBLE PROBABLE CAUSE REMEDY

Excessive noise in pump. Low oil level in reservoir. Fill reservoir to proper level withrecommended fluid.

Air in system. Open reservoir cap and operate systemuntil purged.

Bleed hydraulic lines at highest pointdown stream of pump while system isunder pressure.

Vacuum condition. Check inlet (suction) line and fittings forair leaks.

Oil too thick. Be certain correct type of oil is used insystem. Warm up pump in cold weatheruntil noise disappears.

Damaged or missing pump seals atmating surfaces.

Locate and replace damaged or missingseals.

Cartridge kit not assembled properly. Reassemble cartridge kit.

Pump inlet/outlet lines reversed. Replumb lines to proper portconnections.

Pump overheating. Internal leakage. If excessive internal leakage exists,return to shop for complete overhaul.

Heat exchanger not functioning. Locate trouble and repair or replace.

System not developing pressure. Relief valve open. Repair or replace.y gLoss of fluid internally (slippage). Return to shop for evaluation and repair.

Cartridge kit not assembled properly. Reassemble kit.

Cartridge kit assembled for oppositerotation.

Reassemble kit to proper rotation.

Pump inlet/outlet lines reversed. Replumb lines to proper portconnections.

Disconnected or broken drivemechanism.

Locate and repair.

Loss of fluid. Ruptured hydraulic lines. Locate and repair.

Leaking or missing seals. Locate and repair.

Table 3. Troubleshooting Chart

8

Section VI – Overhaul

A. Service ToolsStandard Tools

1. One torque wrench with short extension and sockets.Select appropriate torque wrench according to cover screwspecifications noted in Tables 4 and 5.

2. One medium size screw driver.

3. One small ball peen hammer.

4. A center punch.

5. One internal retaining ring pliers.

6. Hydraulic oil lubricant or equivalent (SAE 10W motor oil).

Special Tools

A shaft seal driver (Figure 5) is the only special tool requiredfor overhaul.

NOTE

In addition to the above tool, an arbor press may berequired to service the shaft bearing.

A

BC

D

Note: All Dimensions are in inches

1/16 � 15�0.125

0.500

E

4.00

Break sharpedges and polish

NOTE: All dimensions in inches.

Dimension

Model A B C D E

2520V2.045� .001

1.683� .001

1.468� .001

1.343� .001

0.250

3520V3525V

2.832� .001

1.997� .001

1.758� .001

1.687� .001

0.250

4520V4525V4535V

3.145� .001

2.371� .001

2.281� .001

1.906� .001

.437

Figure 5. Shaft seal driver

B. Unit Removal

WARNING

Turn off all electrical power and relieve hydraulicpressure. Lower all vertical cylinders. Block anyload whose movement could generate pressure.

1. Close off hydraulic oil source to pump inlet if anoverhead reservoir is used.

2. Remove the unit from the system.

3. Cap all system and unit openings to prevent entry ofdirt or moisture.

C. DisassemblyThe inlet numbers of Figure 8 are in disassembly order se-quence.

NOTE

4535V models are slightly different from the modelsshown in Figure 8. Screws (4) are longer and fastencover (5), inlet housing (19) and body (38) together.Screws (18) are omitted.

1. Thoroughly clean pump exterior.

2. Use a prick punch and mark position of cover (5) andbody (38) with respect to inlet housing (19).

3. Remove two screws (1) and remove the pump frommounting flange (2).

4. Remove key (3) from shaft (34).

5. Remove the four screws (4) from cover (5), then,remove cover.

6. Remove seals (7, 8, 9 and 10) from cartridge kit (6)and discard.

7. Remove cartridge kit (6) from inlet housing (19) anddisassemble according to item number sequence.

8. Remove four screws (18) from housing (19) and thenremove housing.

9. Pull cartridge kit (20) from body (38) and disassemblyin item number sequence.

10. Pry under coil and remove spirolox ring (31) frombody (Figure 6).

Spirolox Ring (31)

Hooked Tool

Figure 6. Removing spirolox ring

9

11. Pull the shaft group (items 32 through 34) from body(38). If bearing 933) or shaft (34) need replacement, removeretaining ring (32) with retaining ring pliers. Remove bearing(33) from shaft (34) by using an arbor press. Apply pressureto the inner race when removing bearing.

12. Remove washer (35) and “O” ring (36) from body (38).

13. Drive shaft seal (37) out of mounting end of body.

D. CleaningAll parts must be thoroughly cleaned and kept clean duringinspection and assembly. contamination of the unit will causeexcessive wear, leakage and decreased service life. Use acommercial solvent which is compatible with the systemfluid. Thoroughly clean all parts. Drying parts with com-pressed air after cleaning is not recommended, unless theair is completely filtered to remove water and contamination.

E. Inspection, Repair and ReplacementCheck all internal passages. Make sure they are clean andunobstructed. Examine all mating surfaces for nicks andburrs. check locating pins and holes for wear and burrs.Check the condition of threaded parts and threaded holes.Check all snap ring recesses. Minor burrs can be removedwith an India stone. Replace any part which shows wear ordamage. The following parts are subject to special attention.

1. Cartridge kits (6 and 20). In order to obtain maximumoverhaul life of the pump, a complete cartridge kit should beinstalled if wear or scoring is noticed during the followinginspection.

a. Inspect the mating surfaces of the rotors (15 and28), outlet support plates (17 and 30) and inlet supportplates (12 and 25) for wear and/or scoring.

b. Inspect the vanes and inserts (16 and 29) forburrs, wear and play in the slots of the rotors (15 and 28).Remove minor burrs with an India stone.

c. Inspect bushing for wear and scoring (Figure 4).

2. Check the bearing (33) for wear, looseness and pittedor cracked races.

3. Inspect the seal and busing mating surfaces on theshaft for scoring and wear. Replace the shaft if marks cannotbe removed by light polishing.

4. Remove burrs from outer edge of ring (17). Placerotor (15) and ring (27) on a flat surface. Measure ring/rotorclearance with a dial indicator. Ring/rotor clearance arenoted in Table 4.

Model Min. Clearancelimit in inches

**20V 0.0007**25V 0.0012**35V 0.001525**V 0.001235**V 0.001545**V 0.0016

Table 4. Minimum allowable ring rotor clearance

F. AssemblyRefer to the parts and service drawing listed in Table 1 forreplacement parts. Always replace old seals with new sealswhen overhauling a unit. If a cartridge kit needs replace-ment, new cartridge seals are included as part of the kit.

Apply a light film of hydraulic fluid to all component parts tofacilitate assembly and provide initial lubrication. Install partsin the reverse order of disassembly (Figure 8).

1. Position seal (37) garter spring toward the inside ofbody (38) and press in place with shaft seal driver (Figure 5).

2. Install washer (35) into body (38).

3. If required, press bearing (33) on shaft (34) andsecure with retaining ring (32). Use an arbor press for thisoperation and apply force to the inner race area.

4. Check the keyway end of shaft to make certain it isfree from nicks and burrs. A small nick or burr can damagethe shaft seal during installation. Coat the keyway portion ofthe shaft with hydraulic fluid. Carefully install the shaft group(items 32 through 34) through the seal and into body (38).Spread spirolox ring (31) and feed it into the groove locatedbehind the bearing. This will secure the shaft group withinbody (38).

5. Install sealing ring (23) into body (38).

6. If cartridge kit (20) is replaced with a new kit, installthe kit into body (38). If cartridge kit requires assembly,assemble in reverse order of disassembly (Figure 8). Duringassembly, note the following precautions.

a. Make sure the arrows on rotor (28) and ring (27)are in the direction of pump rotation.

b. Make certain that sharp edges of vanes (29) leadin the direction of rotation (Figure 7).

InletDirection of

rotationRotor

Sharp edgeslead directionof rotation Vane

Ring

Figure 7. Positioning vanes in rotor

10

c. Make sure “O” ring (22) and back-up ring (21) areassembled correctly. Position as shown in Figure 8. Apply asmall amount of system fluid to screws (24) and threadscrews into cartridge kit. Install cartridge kit 920) into body(38).

7. Install “O” ring (36) over cartridge kit (20) and into“O” ring groove of body (38).

8. Line up the two cartridge kit pins (26) with the holes inhousing (19) and then install the housing. Position thehousing according to punch marks made during step C.2 ofDisassembly procedure. Attach housing to the body with fourscrews (18). Torque the screws to specifications noted inTable 4.

Torque Specification

Model N.m lb.ft.

2520V 48–55 65–75

3520V 102–118 140–160

3525V 102–118 140–160

4520V 188–203 255–275

4525V 188–203 255–275

4535V – –

Table 4. Torque specifications for screw (18)

9. If cartridge kit (6) is replaced with a new kit, line uppins (13) with holes in housing (19) and install kit intohousing. If cartridge kit requires assembly, assemble inreverse order of disassembly. During assembly, note thefollowing precautions.

a. Make sure the rotation arrows on the rotor (15)and ring (14) are in direction of pump rotation.

b. Be certain the sharp edges of vanes (16) lead indirection of pump rotation.

c. Make sure “O” ring (9) and back-up ring (8) areassembled in the correct position (Figure 8).

NOTE

Cartridge kit (6) is assembled into housing (19) inthe reverse manner of cartridge kit (20). Make surethe rotation arrow of the ring points in direction ofrotation.

d. Apply a small amount of hydraulic fluid to screws(11) and thread screws into cartridge kit.

10. Install sealing ring (10) into cover (5).

11. Install “O” ring (7) over cartridge kit (6) against thehousing face.

12. Position cover (5) over cartridge kit (6) according tothe prick marks made during step C.2 of disassemblyprocedures. Install cover (5) and secure with screws (4).Torque screws (4) to specifications noted in Table 5.

Model N.m lb.ft.

2520V 54–68 40–50

3520V 54–68 40–50

3525V 88–102 65–75

4520V 54–68 40–50

4525V 88–102 65–75

4535V 188–203 255–275

Table 5. Torque specifications for screw (4)

13. Install key (3) into groove on shaft (34).

14. Place pump into mounting bracket (2) and securewith two screws (1).

Section VII – Start-Up and Test

A. Start-UpInstall the unit into the system. Make sure that the drive shaftis aligned properly, all connections are tight and the hydraulicoil source is open to pump inlet. If an overhead reservoir isused, purge air from inlet line.

The pump should prime almost immediately with a minimumdrive speed of 600 RPM. Intermittently operate (jog) thepump until it primes. It may be necessary to loosen the outletfitting temporarily to purge trapped air. Failure of the pump to

prime in a short period of time indicates incorrect assemblyor restricted flow from the reservoir.

B. TestUse your hydraulic system to test the unit. Refer to theinstallation drawings listed in Table 1 for recommendedspeeds and pressures. If more precise testing is desired,consult your Vickers sales engineering office.

Figure 8. Exploded view and disassembly sequence

11

7

14

8 9 10

12 1316116

4 5

1715 18

19

26 2425 27 28 29

30 23 22 21 31 32 33

20

34

3

35 37 36 1 38 2

Item Description Qty

123456789

10111213141516171819

ScrewMounting BracketKeyScrewCoverCartridge Kit (items 7-17)“O” RingBack-up Ring“O” RingSealing RingScrewInlet Support PlatePinRingRotorVanes & Intra-vanesOutlet Support PlateScrewHousing

211411111121211

12141

Item Description Qty

20212223242526272829303132333435363738

Cartridge Kit (items 21-30)Back-up Ring“O” RingSealing RingScrewInlet Support PlatePinRingRotorVanes & Intra-vanesOutlet Support PlateSpirolox RingRetaining RingBearingShaftWasher“O” RingShaft SealBody

11

1211111111111111111

12Printed in U.S.A.

Form No. 00-000 Copyright Eaton Corporation, 0000All rights reserved.Printed in U.S.A

Eaton Hydraulics15151 Highway 5Eden Prairie, MN 55344Telephone: 612 937-7254Fax: 612 937-7130www.eatonhydraulics.com

46 New Lane, HavantHampshire PO9 2NBEnglandTelephone: (44) 170-548-6451Fax: (44) 170-548-7110