Maverick Technical Manual

Maverick Equipment Manufacturing, Inc. U.S.A. - Product Technical Manual

TD-000-E04

Maverick Hydraulic Hammers

Service and Technical Manual


C O N T E N T S


1. About the Hammer

1.1 Definition (mechanism) ............................................................................................................................................. 8

1.2 General composition of the Hammer for use ........................................................................................... 8

1.3 General classification of the Hammer ..................................................................................................... 9

2. General specifications

2.1 Standard technical specifications .................................................................................................................. 11

2.2 Dimensions

2.2.1Tool(Rod) ....................................................................................................................................................................... 16

2.2.2 Main body(Hammer) .......................................................................................................................................... 19

2.2.3 Bracket(Housing)

(1) Silenced type (S-type) ......................................................................................................................... 26

(2) Top type (T-type) ..................................................................................................................................... 30

(3) Side type (H-type) ................................................................................................................................... 33

(4) Back hoe type (B-type) ....................................................................................................................... 35

(5) Uniram type (U-type) ............................................................................................................................. 36

2.2.4 Top plate ..................................................................................................................................................................... 37

3. Structural view of the hammers

3.1 350, 400, 500, 750, 1000, 1500, 2250, 3250 .............................................................................. 43

3.2 6250 ................................................................................................................................................................................ 44

3.3 4750, 5250, 8250, 9250 .................................................................................................................................... 45

4. Functions of the main components

4.1 350, 400, 500, 750, 1000, 1500, 2250, 3250 ...................................................................................... 47

4.2 6250 ................................................................................................................................................................................ 48

4.3 4750, 5250, 8250, 9250 .................................................................................................................................... 49

4.4 Valve system ............................................................................................................................................................. 50

5. Principle of operation

5.1 350, 400, 500, 750, 1000, 1500, 2250, 3250, 6250

Introduction .......................................................................................................................................................... 52

Piston start up (Return stroke) ............................................................................................................... 53

Valve changing ................................................................................................................................................. 54

Impact stroke ...................................................................................................................................................... 55

5.2 4750, 5250, 8250, 9250

Introduction ..........................................................................................................................................................57


Maverick Hammers - U.S.A.

C O N T E N T S

6.16 Disassembly and assembly of the valve and valve plug ......................................................... 77

6.17 Disassembly and assembly of the valve housing ........................................................................... 78

6.18 Disassembly and assembly of the accumulator adjuster ......................................................... 79

6.19 Disassembly and assembly of the accumulator cover ........................................................... 80

6.20 Disassembly and assembly of the accumulator bottom ............................................................ 81

6.21 Disassembly and assembly of the cylinder adjuster ....................................................................... 82

6.22 Disassembly and assembly of the air vent ........................................................................................... 83

6.23 Disassembly and assembly of the seal in the seal housing ...................................................... 84

6.24 Disassembly and assembly of the seal in the cylinder ................................................................. 85

6.25 Disassembly and assembly of the silencing parts ............................................................................ 86

7. Torque references

7.1 350, 400, 500 ................................................................................................................................................................ 88

7.2 750, 1000, 1500, 2250, 3250 ............................................................................................................................. 89

7.3 4750, 5250, 6250, 8250, 9250 .......................................................................................................................... 90

8. Valve adjuster control ........................................................................................................................................................ 92

9. Tool

9.1 Replacement of the tool .................................................................................................................................. 94

9.2 How to use tools properly .................................................................................................................................... 95

10. How to charge N2 gas

10.1 Gas charging to the back-head ........................................................................................................... 100

10.2. Gas charging to the accumulator. ........................................................................................................ 102


11.. AABBOOUUTT TTHHEE HHaammmmeerr


1.1 Definition ( mechanism )

The Hammer is the hammering implement using movement energy transformed from

electric, hydraulic, pneumatic energy, etc each by mechanical tools, hydraulic circuit,

pneumatic circuit mechanism.

The Hammer is used for various purposes, for example, to crush and demolish rocks in

quarries and mines or for building dismantling works, pavement breaking and so on with

mounting it on the excavator.

The Hammer was first developed for pneumatic system using only compressed air. After

then, it has been developed for hydraulic system using hydraulic oil supported from the

hydraulic pump of the excavator and now being in use with mixture system of nitrogen gas

and hydraulic pressure as designed for less consuming of the hydraulic oil, high efficiency

and more lightening in weight in order to minimize any possible damage on the

excavator’s unit.

(hydraulic pump)

1.2 General composition of the Hammer for use

A) Main body parts

B) Piping parts

C) Bracket parts

D) Hydraulic unit (Power units)


1.3 General classification of the Hammer

1.3.1 According to the source of the power supply

- Spring type

- Air pressure type

- Gas pressure type

- Diesel engine type

- Hydraulic pressure type

- Gas + Hydraulic pressure type

1.3.1 According to the mounting angle to the excavator

- TOP TYPE : mounting part is above housing

- SIDE TYPE : mounting part is beside housing

Maverick Hammers - U S A


22..GGEENNEERRAALL SSPPEECCIIFFIICCAATTIIOONNSS



Standard Technical Specifications

MODEL 350 400 500 Number of strike (bpm) 800 - 1,350 650 - 1,200 550 - 1,100

Pressure Relief

bar 110 - 140 110 - 140 110 - 140

(psi) 1,564 - 1,992 1,564 - 1,992 1,564 - 1,992

Operating pressure (Hammer)

bar 90 - 120 90 - 120 90 - 120

(psi) 1,280 - 1,707 1,280 - 1,707 1,280 - 1,707

Back head pressure bar 13 - 15 13 - 15 13 - 15

(psi) 185 - 213.4 185 - 213.4 185 - 213.4

Accumulator pressure bar - - -

(psi) - - -

Oil flow lpm 15 - 30 20 - 40 25 - 50

HYD. Oil temperature (°C) (-20) - (+80) (-20) - (+80) (-20) - (+80)

HYD. Oil viscosity (CST) 15-1,000 15-1,000 15-1,000

Line size

IN (INCH)

3/8“ 3/8“ 1/2“

OUT (INCH)

3/8“ 3/8“ 1/2“

Carrier Weight ton 0.8 - 2.5 1.2 - 3 2.5 - 4.5

(lbs) 1,600-5,000 3,000-7,000 6,000-10,000

Tool shank diameter mm 36 45

53

(INCH) 1.57 1.77 2.08

* The above specifications are subject to change without prior notice for the

quality enhancement.



Standard technical specifications

MODEL 750 1000 1500

Number of strike (bpm) 500 - 1,000 450 - 1,000 475 - 950

Pressure Relief bar 110 - 140 120 - 150 130 - 160

(psi) 1,564 - 1,992 1,396 - 1,745 1,513 - 1,862

Operating Pressure

(Hammer)

bar 90 - 120 100 - 130 110 - 140

(psi) 1,280 - 1,707 1,422 - 1,849 1,564 - 1,992

Back Head Pressure bar 13-15 13-15 13-15

(psi) 185-213.4 185-213.4 185-213.4

Accumulator pressure bar - - -

(psi) - - -

Oil flow lpm 30 - 60 40 - 70 50 - 90

HYD. Oil Temperature (°C) (-20) - (+80) (-20) - (+80) (-20) - (+80)

HYD. Oil viscosity (CST) 15 - 1,000 15 - 1,000 15 - 1,000

Line Size

IN (INCH)

1/2“ 1/2“ 1/2“

OUT (INCH)

1/2“ 1/2“ 1/2“

Carrier Weight ton 3 - 5.5 5-8.5 7-9.5

(lbs) 7,000-12,000 10,000-17,000 14,000-19,000

Tool shank diameter mm 60 68 75

(inch) 2.36 2.67 2.95






MODEL 2250 3250 4750

Number of strike (bpm) 480 - 850 480 - 780 350 - 750


(psi) 1,992 - 2,418 2,134 - 2,561 2,276 - 2,703

Operating pressure bar 120 - 150 130 - 160 140 - 170

(HAMMER) (psi) 1,707 - 2,134 1,850 - 2,276 1,992 - 2,418

Back head pressure bar 15 - 17 15 - 17 5-7

(psi) 213.4 - 241.8 213.4 - 241.8 73 - 102

Accumulator pressure bar - - 55

(psi) - - 782

Oil flow lpm 60 - 100 80 - 110 90 - 120


HYD. Oil viscosity (cST) 15 - 1,000 15 - 1,000 15 - 1,000

Line size

IN 3/4“ 3/4“ 1"

( inch )

OUT 3/4“ 3/4“ 1"

( inch )

Carrier weight ton 8-12 11-19 14 - 19

(lbs) 16,000-24,000 22,000-38,000 35,000-48,000


(inch) 3.35 3.94 4.72






MODEL 5250 6250 8250

Number of strike (bpm) 300 - 600 280 - 500 300 - 400


(psi) 2,561 - 2,846 2,561 - 2,846 2,561 - 2,846

Operating pressure bar 160 - 180 160 - 180 160 - 180

(HAMMER) (psi) 2,276 - 2,561 2,276 - 2,561 2,276 - 2,561

Back head pressure bar 5-7 5-7 5-7

(psi) 73 - 102 213.4 - 241.8 73 - 102

Accumulator pressure bar 55 55 55

(psi) 782 782 782

Oil flow lpm 120 - 150 120 - 150 160 - 190


HYD. Oil viscosity (cST) 15 - 1,000 15 - 1,000 15 - 1,000

Line size

IN 1“ 1“ 1“

( inch )

OUT 1“ 1“ 1“

( inch )

Carrier weight ton 18 - 26 20 - 28 27 - 36

(lbs) 38,000-54,000 42,000-65,000 72,000-105,000


(inch) 5.31 5.51 5.9






MODEL 9250 10,000

Operating Weight (kg) 2,650 3,750

lbs 5,830 8,250

Number of strike (bpm) 260 - 400 200 - 350

Pressure Relief bar 180 - 210 180 - 210

(psi) 2,560 - 2,987 2,560 - 2,987

Operating pressure bar 160 - 190 160 - 190

(HAMMER) (psi) 2,275 - 2,702 2,275 - 2,702

Back head pressure bar 15 - 17 17.5-250

(psi) 213.4 - 241.8 73 - 102

Accumulator pressure bar 60 60

(psi) 870 870

Oil flow lpm 190 - 250 210 - 290

HYD. Oil temperature (°C) (-20) - (+80) (-20) - (+80)

HYD. Oil viscosity (cST) 15 - 1,000 15 - 1,000

Line size

IN 1-1/4“ 1-1/4“

( inch )

OUT 1-1/4“ 1-1/4“

( inch )

Carrier weight ton 35 - 50 45 - 60

(lbs) 72,000-105,000 88,000-110,000

Tool shank diameter mm 160 180

(inch) 6.3 7.08





Dimensions - Tool -

BLUNT CONICAL WEDGE MOIL POINT

model 350 400

standard BLUNT CONICAL WEDGE MOIL BLUNT CONICAL WEDGE MOIL

Length (mm) 400 400 400 400 460 460 460 460

Weight ( kg ) 3 2.8 2.9 2.8 5.4 5 5.2 5

Diameter (mm)

Φ36 Φ36 Φ36 Φ36 Φ45 Φ45 Φ45 Φ45

model 500 750


Length (mm) 500 500 500 500 500 500 500 500

Weight (kg) 8.1 7.2 7.7 7.4 10.1 8.9 9.5 9.1

Diameter (mm)

Φ53 Φ53 Φ53 Φ53 Φ60 Φ60 Φ60 Φ60

model 1000 1500


Length (mm) 690 690 690 690 750 750 750 750

Weight (kg) 18.7 17.1 17.9 17.4 24.7 22.9 23.5 22.8

Diameter (mm)

Φ68 Φ68 Φ68 Φ68 Φ75 Φ75 Φ75 Φ75



Dimensions - ToolS -


model 2250 3250


Length (mm)

800 800 800 800 1,000 1,000 1,000 1,000

Weight ( kg )

33.9 30.2 31.8 30.7 58 53.2 55.3 53.6

Diameter (mm)

Φ85 Φ85 Φ85 Φ85 Φ100 Φ100 Φ100 Φ100

model 6250 9250


Length (mm)

1,248 1,248 1,248 1,248 1,500 1,500 1,500 1,500

Weight (kg)

143.6 127 134.3 129.1 209.2 190.2 199 192.8

Diameter (mm)

Φ140 Φ140 Φ140 Φ140 Φ160 Φ160 Φ160 Φ160

model 10,000H standard BLUNT CONICAL WEDGE MOIL Length (mm)

Weight (kg)

Diameter (mm)

Φ180 Φ180 Φ180 Φ180



Dimensions - Tools-


model 4750 5250


Length (mm)

1,100 1,100 1,100 1,100 1,200 1,200 1,200 1,200

Weight (kg)

95.3 87.1 91.1 88.3 126 113.7 119.5 115.5

Diameter (mm)

Φ120 Φ120 Φ120 Φ120 Φ135 Φ135 Φ135 Φ135

model 8250

standard BLUNT CONICAL WEDGE MOIL

Length (mm)

1,300 1,300 1,300 1,300

Weight (kg)

174.9 159.4 170.8 161.6

Diameter (mm)

Φ150 Φ150 Φ150 Φ150



Dimensions - Main Body (Hammer) -

350 400



Dimensions ( )

500 750




1000 1500




2250 3250




4750 5250



Dimensions Main Body (Hammer)

6250 8250




9250 10,000



Dimensions Main Bracket

- Silenced type (S-type) -

(mm) 350HSP 400HSP 500HSP 750HSP

B1 175 186 190 212

B2 220 228 246 272

H1 202.5 211.5 215.5 240

H2 280 293 302 345

T1 20 20 20 25

T2 14 14 16 16

L0 963 1073 1133 1142

L1 214.5 279 285 284

L2 716.5 762 813 823




- Silenced type (S-type) -

(mm) 1000HSP 1500HSP 2250HSP 3250HSP

B1 260 260 260 320

B2 390 390 400 500

H1 295 325 340 390

H2 420 420 470 520

T1 36 40 40 40

T2 19 20 20 25

L0 1452 1463.5 1781 2024

L1 369 317.5 426 531

L2 1029 1094 1339 1477




- HSP Models - Silenced type-

(mm) 4750HSP 5250HSP 6250HSP 8250HSP

B1 370 404 410 425

B2 550 560 560 630

H1 425 480 540 500

H2 650 700 730 700

T1 40 40 40 50

T2 28 28 28 32

L0 2141 2397 2466 2621

L1 667 747 675 779

L2 1455 1632 1773 1824




- HSP Models - Silenced type -

(mm) 9250HSP

B1 465

B2 700

H1 550

H2 830

T1 50

T2 35

L0 2990

L1 856.5

L2 2110




- HP Models -

(mm) 1000HP 1500HP 2250HP 3250HP

B1 296 316.5 330 386

B2 390 390 400 500

H1 420 420 470 520

T1 19 19 20 25

L0 1,426 1,453.5 1,828 2,030

L1 415 368.5 465 561

L2 955 1,069 1,347 1,453




- HP Models -

(mm) 4750HP 5250HP 8250HP 9250HP

B1 412 447 482 538

B2 550 560 630 700

H1 500 540 575 685

H2 650 700 700 830

L0 2,137 2,451.5 2,608 3,037

L1 669 783.5 754 861.5

L2 1,449 1,650 1,854 2,152

T1 40 40 50 50

T2 28 30 32 36




- HP Models -

(mm) 6250HP 10,000HP

B1 447 TBD

B2 560

H1 590

H2 730

T1 2456

T2 670

L0 1,768

L1 40

L2 28




- Side type(H-type) -

(mm) 1000LBH 1500LBH 2250LBH 3250LBH

B0 180 220 226 320

B1 258 310 328 422

B2 294 331 356 422

H1 690 725 854 1067.5

H2 260 290 340 380

L0 1356 1388.5 1737.5 1969

L1 941 1020 1263 1408

D 60 65 75 80




- Side type(H-type) -

(mm) 4750LBH 5250LBH 6250LBH 8250LBH 9250LBH

B0 418 447 447 482 512

B1 350 350 350 440 440

B2 480 490 490 600 600

H0 625 650 597 585 685

H1 460 450 450 480 570

H2 1202.5 1217 1238 1376 1464

L0 2042 2303 2366 2516 2843.5

L1 1345 1565 1696 1712 1982

T 40 40 40 50 50

D Φ100 Φ100 Φ100 Φ120 Φ120




- HLB - Back hoe type-

(mm) 400 500 750 1000 1500

B1 380 380

B2 623 679

H1 260 260

H2 324 324

H3 378 378

L0 1671 1665.5

L1 1236 1297

D 60 60




- Uniram type(U-type) -

(mm) 400 500 750 1000 1500

B1 195 1210 1278 280 1591.5

B2 300 887 951 420 1223

H1 130 215 280 175 290

H2 188 339 416 235 440

H3 193 154 175 274 220

L0 1129.5 214 235 1555 310

L1 812.5 227 277 1120 339.5

D Φ45 Φ65 Φ60 Φ60 Φ65



Dimensions

Top plate

(mm) 350 400 500

L0 280 293 302

L1 15 15 18

L2 125 131.5 133

L3 125 131.5 133

H0 220 228 246

H1 16 16 18

H2 95 99 105

H3 95 99 105

D 15 15 18

R 5 5 5

T 14 14 14



Dimensions

Top plate

(mm) 750

L0 345

L1 18

L2 103

L3 103

L4 103

H0 272

H1 18

H2 118

H3 118

D 18

R 5

T 16



Dimensions

Top plate

(mm) 1000 1500 2250 3250

L0 420 420 470 520

L1 25 25 25 25

L2 115 115 140 150

L3 140 140 140 170

L4 115 115 140 150

H0 390 390 400 500

H1 25 25 25 25

H2 105 105 120 150

H3 130 130 110 150

H4 105 105 120 150

D 23 23 23 23

R 20 20 20 20

T 19 19 19 25

\



Dimensions

Top plate

(mm) 4750 5250 6250 8250

L0 650 700 730 700

L1 30 30 30 30

L2 200 215 230 215

L3 190 210 210 210

L4 200 215 230 215

H0 550 560 560 630

H1 30 30 30 30

H2 150 165 165 180

H3 190 170 170 210

H4 150 165 165 180

D 27 27 27 27

R 25 25 25 25

T 30 30 28 32



Dimensions

Top plate

(mm) 9250

L0 830

L1 35

L2 190

L3 190

L4 190

L5 190

H0 700

H1 35

H2 190

H3 250

H4 190

D 33

R 30

T 35


33..SSTTRRUUCCTTUURRAALL VVIIEEWW OOFF TTHHEE HHAAMMMMEERRSS



Main body structural view (350, 400, 500, 750, 1000, 1500, 2250, 3250)


Main body structural view (6250)


Main body structural view (4750, 5250, 8250, 9250, 10,000, 12,000, 15,000)



44..FFUUNNCCTTIIOONNSS OOFF TTHHEE MMAAIINN CCOOMMPPOONNEENNTTSS

M i k H U S A


Functions of main components (350, 400, 500, 750, 1000, 1500, 2250, 3250)

Through Bolt

The Front head, the cylinder and the Back-Head of the main body are tightly fixed with four through bolts.

Back-Head

The Gas charging valve is built in and the inside is charged with N2-gas.

Valve System

The Cylindrical control valve is built in the valve housing and controls piston reciprocation.

Piston

Kinetic energy of the piston is converted into hammering energy after hitting the Tool. The hammering

energy transmitted to the Tool breaks rocks.

Front Head

The front head supports the whole Hammer. The Thrust ring and the thrust bushing prevents shock from the

Tool.

Tool

The specially heat-treated Tool is directly applied to break rocks. It is used as moil point, wedge point and

flat Tool according to the application (optional).



Functions of main components (6250)

Through Bolt


Back-Head


Valve System


Piston



Front Head

The front head supports the whole Hammer. The Thrust ring and the thrust bushing prevent shock from the

Tool.

Tool


flat Tool according to the Application (optional).

Accumulator Ass'y

The accumulator compensates for pressure in the hydraulic circuit and prevents pulsation.

It is not usually necessary to refill. Use N2-gas only.



Functions of main components (4750, 5250, 8250, 9250, 10,0o00, 12,000. 15,000)

Through Bolt


Back-Head


Valve System


Piston



Front Head

The front head supports the whole Hammer. The Thrust ring and the thrust bushing prevents shock from the

Tool.

Tool


flat Tool according to the application(optional).

Accumulator Ass'y

The accumulator compensates for pressure in the hydraulic circuit and prevents pulsation.


Valve system

VALVE SYSTEM V/V SLEEVE

(V/V HOUSING) VALVE VALVE PLUG

VALVE

COVER

(350, 400, 500, 750, 1000,

1500, 2250,3250,10,000H)

( 6250 )

( 4750, 5250, 8250, 9250 )



55..PPRRIINNCCIIPPLLEE OOFF OOPPEERRAATTIIOONN



Introduction (350 - 3250, 6250)

The relation between the pressure affected area A₁ of the piston rear chamber and the pressure affected

area A1 of the piston front chamber is A₁> A₂. High-pressure oil is always applied to A1and, when oil

pressure applied to A₁ is changed from high to low pressure and vice versa, piston C₂ reciprocates. Similarly

the relation between the pressure affected area A₃ of the valve high-pressure chamber and the pressure

affected area A₄> A₃. High-pressure oil is always applied to A₃ and, when the oil pressure applied to A₄ is changed from high to low pressure and vice versa, valve C₄ changes to alter the port to the piston rear

chamber B₁ from the high-pressure side to the low-pressure side and vice versa and, in accordance with

the reciprocation of valve C₄, piston C₂ reciprocates. Further the back head is charged with N₂ gas.

When the piston moves backward, the N₂ gas is compressed to store the gas energy and, when the piston hammers, the gas energy is converted into piston hammering energy.



Piston start up (Return stroke) (350 - 3250, 6250)

When high-pressure oil is applied to the IN port of the hydraulic Hammer, the high-pressure oil acts upon the piston front chamber A₂ and valve high-pressure chamber V₁ to hold down the valve. As the piston rear chamber B₁ is connected to the OUT port through the valve, The piston C₂ starts

moving backward under the high-pressure oil applied to the pressure affected area A₂ of the piston front chamber.



Valve changing (350 - 3250, 6250)

When the piston moves backward, The high-pressure oil acts upon the valve change V1 and the valve changes. At this time, the piston rear chamber B₁ is disconnected from the valve low-pressure chamber V₃ and connected to the valve high-pressure chamber B 3 and pressure in the piston rear chamber B₁ increases.



Impact stroke (350 ~ 3250, 6250)

When the piston C₂ reaches top high-pressure oil from the valve high-pressure chamber B 3 acts upon the piston rear chamber B₁. At the same time the piston moves forward and impacts the tool. The valve is held open because high-pressure chamber V₁



Introduction

(4750, 5250, 8250, 9250, 10,000, 12,000, 15,000)



Introduction

(4750, 5250, 8250, 9250, 10,000, 12,000, 15,000)

The relation between the pressure affected area A1 of the piston rear chamber and the pressure affected

are A2 of the piston front chamber is A1>A2. High-pressure oil is always applied to A2 and, when oil pressure

applied to A1 is changed from high to low pressure and vice versa, piston C2 reciprocates. Similarly the

relation between the pressure affected area A3 of the valve high-pressure chamber and the pressure

affected are A4>A3. High-pressure oil is always applied to A3, A4 and A3<A4. Therefore, the Valve is move

the A4 side and vice versa, valve C4 changes to alter the port to the piston rear chamber B1 from the high-

pressure side to the low-pressure side and vice versa and, in accordance with the reciprocation of valve

C4, piston C2 reciprocates. Further the Back-Head is charged with N2-gas. When the piston moves

backward, the N2-gas is compressed to store the gas energy and, when the piston hammers, the gas

energy is converted into piston hammering energy.



Piston start up (Return stroke)

(4750, 5250, 8250, 9250, 10,000, 12,000, 15,000)

When high-pressure oil is applied to the IN port of the hydraulic Hammer, the high-pressure oil acts upon the

piston front chamber A2 and valve high-pressure chamber V1 to hold down the valve. As the piston rear

chamber B1 is connected to the OUT port through the valve and changed to the low-pressure side, piston

C2 start moving backward under the high-pressure oil applied to the pressure affected area A2 of the

piston front chamber. At this time, N2-gas in the Back-Head is compressed.



Valve changing (4750, 5250, 8250, 9250, 10,000, 12,000, 15,000)

When the piston moves backward and the piston rear chamber B1 is connected to the valve change port

B3, the high-pressure oil acts upon the valve change chamber V4 and the valve changes.

At this time, the piston rear chamber B1 is disconnected from the valve low-pressure chamber V3 and

connected to the valve high-pressure chamber V1 and pressure in the piston rear chamber B1 increase.



Impact stroke ( 4750, 5250, 8250, 9250 )

When piston C2 reaches top dead center, high-pressure oil from the valve high-pressure chamber V1 acts

upon the piston rear chamber B1 and the hammering stroke. Converted into the compressed gas energy in

the Back-Head. The valve is held open because high-pressure chamber V1 and valve change chamber V4.


66..DDIISSAASSSSEEMMBBLLyy

aanndd AASSSSEEMMBBLLyy

OOFF TTHHEE HHAAMMMMEERR



Disassembly and assembly of the plug

When removing the rubber cap from bracket, insert the long nose ripper to the groove of rubber cap and pull out the rubber cap in slide.

Pull out rubber cap using screwdriver or end-pointed instruments.

Disassemble Rubber cap.



Disassembly and assembly of the tool pin and stop pin

Insert the pin into the rubber cap hole and hit the pin using

a handle hammer.

Remove the stop pin.

Push up the tool pin using pin, and take out the tool pin.



Disassembly and assembly of the tool

Set the nylon sling in the center of the tool and lift it a little and remove the tool slowly.

Disassemble bolts and nuts of cover plate using spanner and pipe.

Remove the cover plate.

Take out upper damper.



Removal of the main body(hammer)

Disassemble support bolts

Install the eye bolt on the back head and lift the main body.



Disassembly and assembly of the wear plates

Disassembly of the wearing plate and bottom plate



Back-head N2 gas charging

1) Discharge of N2 gas in the back head. · N₂ gas inside Back head should be completely removed.

If not so, explosion may occur, when through bolt is loosened. · Notice the procedure following the gas pressure.

2) Charge of N2 gas in the back head · Install charging adapter on charging valve of back head in connection of N₂ gas bottle charge back

head with N₂ gas. · Insert charging valve cap of back head.

Used tools *Spanner 17 x 19mm

*N₂ bottle Charging device set.

! WARNING Do not attempt to disassemble or assemble without discharging



Loosening and tightening of the through bolt

1) Loosening ·Through bolt & Nut can be disconnected in use of power wrench or, hammer wrench Can be used Not loosening it completely, but do only until it can be turned with hand. 2) Tightening ·Clean the through bolt and the contact surface of the through bolt. ·Grease the screw threads of through bolt. ·Tighten it at a half degree a regular torque toward the diagonal direction. Tighten it at a regular torque.



Disassembling and assembling of the back-head

1) Disassembly - Separate back head in use of hoist or chain block. - Take out O-ring.

2) Assemble - Put O-ring to back head fit O-ring to the top of cylinder and - Insert joint ring into the top of back head connect in with cylinder, using hoist or chain block apply grease to it



Disassembling and assembling of the piston and the seal housing

1) Disassembling of piston and seal housing · Lifting eyes on Piston · Lift piston upward from Cylinder carefully, and it could be laid according to job site situation. ·Stand Piston removed, and separate Seal housing from Piston topping the lower part of Seal housing

in use of rubber hammer. · Screw M16 Lifting bolts on Cylinder, and lift carefully upwards to be laid, using hoist or chain block.

2) Assembling of piston and seal housing ·Lift Cylinder to fit into Front head. · Put it into Cylinder slowly, lifting with Hoist or Chain block. ·When Seal housing is inserted, Plastic or Rubber hammer should be used. And strike it, putting on

rubber plate.



Disassembling and assembling of the cylinder assy.

1) Disassembling and assembling

- Set the nylon sling to the bolts on both sides of the cylinder and lift the cylinder. While lifting it, insert the pipe into the tie rod hole and lay it down.



Disassembling and assembling of the tool bush

1) Disassembling a) Remove the locking pin A. b) Remove the tool bushing B from the front head, using sleeve puller. c) If tool bushing is tight, warm the under part of the front head. d) Check tool and tool bushing for wear 2) Assembling a) Clean all parts. b) Apply Mo S2 spray to the contact surface of Tool bushing and Front head. c) Install Tool bushing B d) Install locking pin A.



Disassembling and assembling of the thrust bush

1) Disassembling a) Remove the locking pin A. b) Remove the tool bushing B from the front head, using sleeve puller. c) If tool bushing is tight, warm the under part of the front head. d) Check tool and tool bushing for wear 2) Assembling a) Clean all parts. b) Apply Mo S2 spray to the contact surface of Tool bushing and Front head. c) Install Tool bushing B d) Install locking pin A.



Disassembling and assembling of the valve adjuster nut

Lay down the cylinder on wood blocks carefully.

Disassemble the valve adjuster using a spanner.



Disassembling and assembling of the valve adjuster and valve cover

Disassemble the adjuster using a L-wrench.

Pull out the adjuster from the valve

Loosen the socket bolts of the valve housing using a L-wrench.

Disassemble the valve housing cover and check the back-up ring and the o-ring.



Disassembling and assembling of the valve plug and valve

After disassembling the cover, and pull out the valve plug carefully.

After disassembling the valve plug, and take out the valve carefully.



Disassembling and assembling of the valve housing

Disassemble the valve housing using a L-wrench.

Remove all socket bolts and disassemble the valve housing using eye bolts.

Check the back-up ring and the o-rings on the bottom side of the cylinder.



Disassembling and assembling of the accumulator adjuster

Before disassembling the accumulator, disassemble the upper cap to discharge the gas.

(If the gas was not discharged completely, it may be dangerous.)

Remove the gas charging valve cap using a spanner.

Using a L-wrench, discharge the gas slowly and carefully. (If the gas was left inside, of the accumulator it would be very dangerous.

So, the gas should be discharged completely.)



Disassembling and assembling of the accumulator cover and diaphragm

Disassemble upper cover bolts using a L-wrench.

After disassembling the socket bolts, pull up the accumulator cover and remove it using a

eye bolt.



Disassembling and assembling of the accumulator bottom

After disassembling the socket bolts, pull up the accumulator cover and remove it using aeye bolt.

Loosen the accumulator body bolts using an L-wrench.



Disassembling and assembling of

the cylinder adjuster

Disassemble the cylinder adjuster nut using a spanner

Disassemble the cylinder adjuster using a spanner



Disassembling and assembling of the Air Valve

Disassemble the air check valve using a spanner.



Disassembling and assembling of the seal in the seal housing

1) Disassembly When Packing, all kind of O-ring are disassembled, be careful not to damage them.

2) Assembly of Seal housing Assembly of Packing Assemble it, by paying attention to the direction on Packing

to be set.



Disassembling and assembling of Seals

1) Disassembly Remove Seal from Cylinder carefully, using tool for disconnecting Seal.

2) Assembly Brush hydraulic oil over the part that Seal is set and fit Packing. Fit Packing and check they are in good fitness. And then, apply grease over

the part.



Disassembling and assembling of the silencing parts

1) Disassembling a. Remove the plug A, C, E, F, G Housing.

b. Disassemble the IN-OUT hoses from The Hammer. c. Remove the cover B and D d. Remove the tool. 2) Assembling a. Install cover C b. Assemble the IN-OUT hoses from The Hammer. c. Install the plug A, B, D, E, F, G into housing



77..TTOORRQQUUEE

RREEFFEERREENNCCEESS



Torque references

Model

Divide Unit 350 400 500

Through Bolt Kg.m 40 40 40

Charging Valve Kg.m 35 35 35

Side Bolt Kg.m 100 100 100

Mount Cap Kg.m - - -

Flange Adapter Bolt Kg.m - - -

Valve Cover Bolt Kg.m - - -

Valve Body Bolt Kg.m - - -

Acc' Body Kg.m - - -

Acc' Cover Kg.m - - -



Torque references

Model

Divide Unit 750 1000 1500 2250 3250

Through Bolt Kg.m 40 40 40 100 150

Charging Valve Kg.m 35 35 35 35 35

Side Bolt Kg.m 100 100 100 145 170

Mount Cap Kg.m - - - - -

Flange Adapter Bolt Kg.m - - - - -

Valve Cover Bolt Kg.m - - - - -

Valve Body Bolt Kg.m - - - - -

Acc' Body Kg.m - - - - -

Acc' Cover Kg.m - - - - -



Torque references

SIDE BOLT

ACCUMULATOR COVER BOLT

ACCUMULATOR BODY BOLT

FLANGE BOLT

VALVE COVER BOLT

VALVE BOX BOLT

MOUNTING BOLT

THROUGH BOLT

SIDE BOLT

ACCUMULATOR COVER BOLT

ACCUMULATOR BODY BOLT

MOUNTING BOLT

THROUGH BOLT

FLANGE BOLT

Model

Divide Unit 4750 5250 6250 8250 9250

Through Bolt Kg.m 175 225 270 250 360

Charging Valve Kg.m 35 35 35 35 35

Side Bolt Kg.m 200 250 250 305 360

Mounting Cap Kg.m 130 150 150 160 220

Flange Adapter Bolt Kg.m 20 20 35 20 20

Valve Cover Bolt Kg.m 60 60 - 45 45

Valve Body Bolt Kg.m 45 45 - 45 45

Acc' Body Kg.m 60 60 60 60 60

Acc' Cover Kg.m 45 45 45 45 45


88..VVAALLVVEE AADDJJUUSSTTEERR

CCOONNTTRROOLL


Function of adjuster controlling the amount of hydraulic oil makes numbers of blows

· Structure for adjusting the amount of hydraulic oil makes numbers of blows and impact force change

through the increase and decrease of the amount of hydraulic oil of return hydraulic circuit passed to oil

tank.

· When hydraulic oil is passed much, numbers of blows go up, impact force goes down.

When hydraulic quantity is passed less, numbers of blows go down, impact force goes up.

◆ Used tools and direction when to handle adjuster.

Description 4750 5250 6250 8250 9250

Used tools Adjuster S10 S12 S8 S12 S12

Adjuster Nut

S26 S32 S26 S32 S32

Clock wise

Impact force

Up Up Up Up Up

Numbers of blows

Down Down Down Down Down



99..TTOOOOLL



Replacement of the tool

1) Remove the stop pin and the Tool pin with a 330mm-long steel bar.

When reassembling, align the groove in the Tool and the Tool pin hole and insert the Tool pins.

2) Reverse disassembly procedures to install a replacement Tool. Before installing a new Tool, check

each part for wear, breakage, scores, etc.

Remove burrs and swellings on each Tool pin, apply a coat of grease to the movable areas of the

Tool pin and the Tool and finally install the Tool.

Excessively deformed the Tool pins will make replacement of the Tool difficult.

The Tool pins must be checked every 100 to 150 hours of operation.

* If the replacement Tool is not a genuine part, we do not guarantee the performance of other

parts of the Hammer.



How to use tools properly

The purpose of this guide to enable you to advise your customer as to the correct application of

BH Demolition Tools and assist you to resolve complaints immediately they occur.

When a tool has apparently failed to give satisfactory service life, a visual inspection often quickly

resolves the cause and saves transport costs and frustration when warranty is rejected.

How a Demolition Tool Hammers Rock and Concrete

When the hammer piston strikes the top of a demolition tool, it sends a compressive stress wave

down to the working end of the tool. Provided the demolition tool is in contact with the rock or

concrete which requires breaking, it is this compressive stress wave which fractures the rock.

Immediately following the compressive stress wave, a tensile stress wave is formed due to the

hammer piston lifting from the top of the demolition tool. This cycle of compressive and tensile

stresses flowing down the tool of repeated for each hammer blow.

Obviously, anything that interferes with the 'strength' if the compressive stress wave during service,

for example 'free running' or bending of the demolition tool due to leverage, will result in loss of

Hammer efficiency of up to 80% and possible fatigue failure of the tool itself.

Cause and Effect of Fatigue

The continuous cycle of compressive and tensile stresses in the demolition tool, even under correct

operating conditions, create fatigue stress in the tool which can lead to the fatigue of a demolition

tool before it is worn out. Again, anything which interferes with the cycle of compressive and tensile

stresses will also increase the level of fatigue stresses will also increase the level of fatigue stress

being applied to the demolition tool and thus increase the risk of early fatigue failure of the tool.




1. The main cause of increased fatigue stress in a demolition tool is any form of side pressure

during service which creates bending. Thus utilizing the tool as a lever, using the incorrect

driving angle or attempting to break ground using the pull of the machine are all

detrimental to the life of a demolition tool and should be avoided. (see Pic1)

PIC. 1 PIC. 2

2. Other causes of increased fatigue stress in a demolition tool include.

a) 'Free running'

In general this is any situation where the hammer piston strikes the top of the demolition tool,

but the working end is not in proper contact with the rock or concrete to be broken. This

includes jobs where the tool slides off the work and also when breakthrough of thin concrete

slabs or boulders occurs.

b) Cold

Low temperature causes a demolition tool to be more susceptible to fatigue failure. Tools

should be warmed before use.

c) Mechanical and thermal damage

Any form of damage to the surface of surface of a demolition tool renders it more liable to

suffer fatigue failure.

Thus all care must be exercised to prevent accidental gouging, or contact welding ('galling'

or 'pick-up') due to contact between the tool and chuck bushing through the lack of

lubrication or excessive leverage (see Pic2)


Maverick Hammers U S A


d) Lubrication

Care must be taken to avoid metal to metal contact that, as a result of galling or pick-up,

could cause deep damage marks which, in turn, lead to the formation of fatigue cracks

and eventual failure of the demolition tool. Ensure that the shank of the demolition tool is

well lubricated before locating in the machine. Molybdenum bisulphide grease is

recommended for this application at three hourly intervals or as per manufactures

instruction.

e) Corrosion

A rusty demolition tool is more likely to suffer fatigue failure, thus keep tools well greased and

sheltered from the weather when not in use.

PIC. 3

Demolition Tool Fatigue Failure

A demolition tool fatigue failure will generally occur approximately 4"

(100mm) either side of the chuck front face (see Pic3) Another slightly less common failure

area can fall approximately8(200mm) from the working end, subject to nature of use.

The fracture face itself will normally

exhibit a semi-circular polished area

with the remainder being of a rougher

appearance (see Pic4)

PIC. 4




The polished semi-circular area in pic4 is the fatigue area and generally starts from a damage mark or

other stress raiser no the outside of the demolition tool and spreads inwards. The fatigue area slowly

widens until the stresses being applied to the demolition tool cause sudden failure of the remaining

section.

Generally, the size of the fatigue area indicates the level of stress applied to the tool, i.e. the smaller

the fatigue area, the higher the stress level, although it must be borne in mind that once initiation of a

fatigue crack has taken place, if requires a lower stress level to cause it to grow.


1100..HHOOWW TTOO CCHHAARRGGEE NN22 GGAASS



Back-head gas charging

① N2 gas cylinder ② Bomb adaptor nut ③ Bomb adaptor

④ hose ⑤ Gas charging kit

* Inspection of N2 gas in the back-head

1) Make sure that the cap and the valve of the gas charging kit(⑤ ) are fully tightened. Screw the

gas charging kit(⑤ ) into the charging valve of the back-head after removing the plug.

2) At this time the handle must be short to prevent the gas from coming

out.

3) Push the handle into the charging valve fully, so the gas pressure inside the back-head is

indicated on the pressure gauge.

4) If the gas pressure is normal, unscrew the gas charging kit after discharging gas inside the gas

charging kit. Reinsert the plug to the Hammer.

5) If the gas pressure is higher or lower, charge it as described below.



Back-head gas charging

1) Connect the charging hose(④ ) to N2 gas cylinder(① ) after screwing the bomb adapter(④) onto

adapter nut(② ) and installing than to the N2 gas cylinder.

2) Connect the gas charging kit(⑤ ) to the charging hose(④ ) after unscrewing the cap on the gas

charging kit.

3) Install the gas charging kit(⑤ ) to the charging valve of the Back-Head. At this time the handle

of the gas charging kit must be up position to prevent the gas from coming out.

4) Push the handle of the gas charging kit fully and turn the handle of the N2-gas cylinder counter

clockwise gradually to charge the Back-Head.

5) When the gas pressure exceeds 10% higher then the specified pressure, close the N2 gas

cylinder by turning the handle clockwise.

6) Leave the handle of gas charging kit up. generated pressure makes, it return back to original

position naturally.

7) Remove the charging hose(④ ) from the N2 gas cylinder(① ) and the gas charging kit (⑤ ), and

the screw the cap onto the gas charging kit.

8) Push the handle of the gas charging kit fully, and the gas pressure inside the back-head is

indicated on the pressure gauge. When the pressure is higher, discharge a small amount of gas

from the back-head repeatedly opening and closing the valve and then gas pressure falls to

the specified pressure.

9) When the gas pressure reaches to the specified pressure, close the valve and release the

handle.

10) Open the valve completely and discharge gas inside the gas charging kit. Remove the gas

charging kit from the charging valve of the Back-Head and install the plug to the charging

valve.

! WARNING ■ CHARGING GAS PRESSURE CHANGES ACCORDING TO THE TOOL CONDITION. LAY DOWN THE HAMMER AND LET THE

TOOL EXTEND FULLY.

■ STAY CLEAR OF THE TOOL WHILE CHARGING THE HAMMER WITH GAS. THE TOOL MAY BE IMPACTED BY THE PISTON

AND FORCED OUT ABRUPTLY.

■ WHEN THE THROUGH BOLTS ARE CHANGED THE N2 GAS MUST BE DISCHARGED WITH THE BACK HEAD, AS IT IS HIGHLY

PRESSURIZED.

■ USE NITROGEN GAS ONLY.

■ SEE "CONVERSION TABLE FOR CHARGING N2 GAS PRESSURE TO THE BACK HEAD"



Accumulator gas charging

① N2-Gas cylinder

② Bombe adaptor nut

③ Bombe adaptor

④ Hose

⑤ Gas charging kit

⑥ O-ring

⑦ O-ring-hex bushing

⑧ O-ring

⑨ O-ring plug

⑩ O-ring

⑪ O-ring cap

⑫ Accumulator charging valve

⑬ O-ring



Accumulator gas charging

1) Connect the charging hose(④ ) to the N2-Gas cylinder(① ) after screwing the bomb

adapter(③ ) on to the adapter, the nut(② ) and installing to the N2-Gas cylinder.

2) Connect the gas charging kit(⑤ ) to the charging hose(④ ) after unscrewing the cap on the

gas charging kit.

3) Remove the cap(⑪ ) from the accumulator and tighten the charging valve(⑫ ) fully.

4) Check if the o-rings (⑥ )(⑧ ) are installed to the bushing(⑦ ). Remove the plug(⑨ ) and screw

the bushing.

5) Loosen the accumulator charging valve(⑫ ) after checking if the bushing(⑦ ) is installed to the

gas charging kit.

6) Turn the handle of the N2-Gas cylinder counter clockwise slowly to charge gas.

7) Charge gas in accordance with the conversion table for charging N2-Gas pressure to the

accumulator.

8) Turn the handle of the N2-Gas cylinder clockwise to close the cock.

9) Close the accumulator charging valve.

10) Loosen the valve of the gas charging kit to discharge the N2-Gas remaining in the charging

hose.

11) Remove the charging hose, the gas charging kit and the bushing and tighten the plug(⑨ ) and

cap(⑪ ).



Caution for gas charging

■ Be sure to use the gas charging kit for charging the N2 gas. If charging gas leaks directly from the

cylinder, the diaphragm may be broken off.

■ If charging for handling N2 gas to only the accumulator, make sure that the accumulator body and

the cover are tightened fully.

1) Make sure the cap and the valve of the gas charging kit(⑤ ) are fully tightened.

2) Remove the cap(⑪ ) from the accumulator and tighten the charging valve(⑫ ) fully.

3) Check if the O-rings(⑥ )(⑧ ) are installed to the bushing(⑦ ). Remove the plug(⑨ ) and the screw in

the bushing.

4) Install the bushing(⑦ ) to the gas charging kit(⑤ ).

5) Loosen the charging valve(⑫ ) gradually. The charging pressure is indicated on the pressure gauge.

6) Close the valve clockwise when the gas pressure is normal. When the gas pressure is higher, repeat

loosening and tightening the valve of gas charging kit. The pressure is lowered gradually.

7) Loosen the valve of the gas charging kit to discharge the N2-gas in the gas charging kit(⑤ )

8) Remove the gas charging kit(⑤ ) and tighten the plug(⑨ ) and the cap(⑪ ).

! WARNING ■ USE SPECIAL CARE TO HANDLE AND STORE THE N2-GAS CYLINDER AS IT IS A HIGHLY PRESSURIZED CONTAINER.

■ USE NITROGEN GAS ONLY.

■ STANDARD ACCUMULATOR GAS PRESSURE 55kg/cm2/780PSI AT 20 /68 AMBIENT TEMPERATURE. DO NOT OVER

PRESSURIZE THE ACCUMULATOR.

■ SEE "CONVERSION TABLE FOR CHARGING N2-GAS PRESSURE TO THE ACCUMULATOR".


1111..CCHHEECCKK LLIISSTT FFOORR MMAAIINNTTEENNAANNCCEE



Maintenance Checklist

Check items Check points

- Looseness, missing and damage to the bolts and the

nuts

- Through bolts

- Bracket mounting bolts

- Accumulator bolts

- Looseness of the hose fittings,

visible damage to the hoses and oil leakage

- Hydraulic pipes for the Hammer

- Oil hoses

- Abnormal oil leakage - connections of the Back-Head and the cylinder

- Clearance between the front head & the Tool

- Abnormal wear and cracks on the Tool - Tool

- Greasing -Grease at start and every 2 or 3 hours using the

head grease pump

-Pumping : 5~10 times

- Hydraulic oil level and contamination - Conditions of the hydraulic oil

- Missing the rubber plugs and the snap rings - Rubber plugs

- Snap rings

- Auto-Greasing kit, looseness, missing and damage - G-adapter

- Air supply Kit, looseness, missing and damage - W-adapter

- The Back-Head gas and the accumulator gas - Filling the Back-Head gas and the

Accumulator



1122..GGUUIIDDEE FFOORR TTRROOUUBBLLEE SSHHOOOOTTIINNGG



General guide for the trouble-shooting

TROUBLE CAUSE REMEDY

1. Hammer fails to hammer

(1) Sufficient high pressure oil

does not flow to Hammer inlet.

(2) Sufficient high pressure oil

flows to Hammer inlet.

(a) Defective hose or pipes. Clogged or

damaged piping

(b) Defective control valve and related

parts. Missing or damaged tie Tool or

control cable

(c) Insufficient hydraulic oil

(d) Internal Hammer defects

(a) Check, clean and repair piping or

replace with new ones.

(b) Check and repair Valve and its

related parts or replace with new

ones.

(c) Refill the oil tank.

(d) Consult with our service

station.

2. Hammer hammers with hammering

force reduced.

(1) Sufficient high pressure oil does

not flow to Hammer inlet.

(2) Sufficient high pressure oil flows

to Hammer inlet.

(a) Defective hose or pipes. Clogged or

damaged piping

(b) Defective control valve and related

parts. Deformed pedal. Deformed

control valve. Stuck control valve.

Insufficient control valve stroke due to

loose screws

(c) Clogged filter in return line of base

machine tank

(d) Insufficient hydraulic oil

(e) Contaminated or deteriorated hydraulic

oil

(f) Defective pump

(g) Internal Hammer defects. Entry of

contaminated articles

(h) Decrease in N2-gas sealing pressure of

Back-Head

(a) Check, clean and repair

piping or replace with new ones.

(b) Check control Valve and related

parts or replace with new ones.

(c) Clean or replace.

(d) Refill.

(e) After flushing tank, change oil

entirely

(f) Ask service station for base machine

service.

(g) Consult with our service station.

(h) Adjust the gas pressure referring to

Chpt. 9,10

3. Hammering force plummets

suddenly and high pressure hose

vibrates excessively during

operation.

(a) Defective Back-Head. Gas leakage (a) Ask our service station for repairs



General guide for the trouble-shooting

TROUBLE CAUSE REMEDY

4. Excessive oil leakage from front

head or Tool.

(a) Worn cylinder seals (a) Ask our service station or repairs

5. Piston works but does not

hammering.

(a) Stuck tool (a) Remove front parts and pull out Tool

and check it.


1133..WWEEAARR LLIIMMIITT RREEFFEERREENNCCEESS OOFF TTHHEE MMAAIINN PPAARRTTSS



Wear limits of the piston

Model L H

350 391 1

400 391 1

500 405 1

750 418 1

1000 485 1

1500 487 1

2250 660 1

3250 679 1

4750 763 2

5250 880 2

6250 790 2

8250 966 2

9250 955 2

10,000 1,100 2



Wear limits of the tool

Model H L

350 252.5 200

400 317 200

500 323 200

750 327 200

1000 415 250

1500 367.5 250

2250 465 250

3250 561 300

4750 697 400

5250 763 400

6250 715 400

8250 804 400

9250 890.5 500

10,000 980 500



Wear limits of the tool bush

Model Inside diameter A as

a new part Inside diameter at

reject limit 350 ø36 ø38

400 ø45 ø47

500 ø53 ø55

750 ø60 ø62

1000 ø68 ø71

1500 ø75 ø78

2250 ø85 ø89

3250 ø100 ø105

4750 ø120 ø125

5250 ø135 ø140

6250 ø140 ø145

8250 ø150 ø155

9250 ø160 ø166

10,000 ø180 ø186



Wear limits of the tool and tool bush

The Tool is deformed by burrs occurring after long-term use. When a Tool tip is worn out, The Tool is

liable to slip. Then, sharpen the Tool tip. Grinding the Tool tip many times to sharpen the edge, but it will

make the heat-treated hardened with a new Tool. If the gap between the Tool and the Tool bush

becomes large, the piston will fail exactly to hit the upper part of the Tool, resulting in damage. When

the gap is found to be over 9mm, replace the Tool bush together with the Tool.

Divide

Model

Dimension Width of Wear

( mm ) Tool Bush Tool Dia

350 40 40 3

400 45 45 3

500 53 53 3

750 60 60 4

1000 68 68 4

1500 75 75 4

2250 85 85 5

3250 100 100 6

4750 120 120 7

5250 135 135 8

6250 140 140 8

8250 150 150 9

9250 160 160 11

10,000 180 180 12


M i k H U S A

Wear limits of the tool pin

Model L ( øD ) H

350 ø24.4 2

400 ø24.4 2

500 ø24.4 2

750 ø30 2

1000 ø30 2

1500 ø30 2

2250 54 2

3250 60 3

4750 72 3

5250 80 3

6250 90.5 3

8250 90.5 3

9250 110 3

10,000 125 4



Wear limits of the thrust bush

Model

øA

L H Inside diameter A as Inside diameter at

a new part reject limit

350 ø36 ø38 12 3

400 ø45 ø47 14 3

500 ø53 ø55 17.5 3

750 ø60 ø62 19 3

1000 ø68 ø71 18 3

1500 ø75 ø78 19.5 3

2250 ø85 ø89 31 3

3250 ø100 ø105 27 3

4750 ø120 ø125 30 3

5250 ø135 ø140 32 3

6250 ø140 ø145 53 3

8250 ø150 ø155 40 3

9250 ø160 ø166 39 3

10,000 ø180 ø186 60 3


1144..HHYYDDRRAAUULLIICC OOIILL



Hydraulic Oil

The Selection of the hydraulic oil determines the efficiency of the hydraulic Hammer

performance. Please consult with our service station under following conditions.

(a) When used in special regions where the climate is extremely cold or hot and, viscosity may

be changed at different constant ambient air temperatures.

(b) When recommended brands of hydraulic oil are not available.

(c) When hydraulic oils supplied for the base machine differ from the recommended one.

Maker

Hydraulic Oil Grease

Viscosity Grade NLGI NO.2

Summer SAE68 Winter SAE46

Shell

Esso

Mobil

Gulf

Shell Tellus T68

Nuto H68

Mobil DTE16

Harmony 68

Shell Tellus T46

Nuto H46

Mobil DTE15

Harmony 46

Alvania Grease2

Beacon Q2

Mobil Grease Special

* Oil Contamination

Contaminated oil results in malfunctions of the Hammer as well as the base machine and

causes damage to the parts. Pay special attention to oil contamination. Contaminated oil

should be changed without delay. When changing oil, thoroughly wash the oil tank, the

cylinder and the pipes. Cleaning or replacing the oil filter also requires check for oil

contamination.

■ Replacement of the filter : after first 50 hours and every 100 hours

■ Replacement of the hydraulic oil : every 500 hours



1155..OOPPTTIIOONNSS



Auto grease system

AUTO GREASE LINE



Under water system

Circuit of Under Water System

Recommended capacity of Air Compressor



Anti dust system ( 1000 ~ 10,000 )

- Piston up -

- Piston impact -

* Anti dust system - the air check valve

Discharges Dust Through Tool


NOTES ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________ ________________________________________________________________________________________________

Maverick Technical Manual

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Transcript of Maverick Technical Manual