Atlas Copco LH 11 Bedienungsanleitung

Overhauling instructions

Handheld hydraulic breakers

No. 3392 5143 01

2008-02-29

11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Contents

English ...................................................................4

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Contents

ABOUT THE OVERHAULING INSTRUCTIONS.....................................5

Repair - general information .................................................6

Torque settings............................................................6

SPECIAL TOOLS FOR REPAIR .................................................6

DISASSEMBLY ..............................................................7

Main components..........................................................7

Nose part................................................................10

Valve housing ............................................................11

Trigger valve .............................................................12

Accumulator .............................................................13

Cylinder .................................................................15

E-handle ................................................................16

ASSEMBLY ................................................................19

Valve housing LH 11-LH 19 E ...............................................19

Valve housing (new type) LH 22-LH 40 E ......................................22

Cylinder .................................................................24

Accumulator .............................................................25

Main components.........................................................27

Mounting of bushing in nose part ...........................................31

Mounting of latch in nose part ..............................................32

Adjustment of E-handle ....................................................34

ENGLISH

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

About the Overhauling instructions

The aim of the instructions is to provide you with knowledge of how to make basic

overhauling of the LH 11-40 handheld hydraulic breakers.

Only qualified and trained persons may operate or maintain the breakers. Use only

authorized parts. Any damage or malfunction caused by unauthorized parts will not

be covered by the Warranty or Product Liability.

For major service to the breakers, contact your nearest authorized Atlas Copco

workshop.

Safety instructions and technical

specifications

Please consult the "Spare parts list" and the "Safety and operating instructions" for

the LH 11-40 handheld hydraulic breakers regarding safety instructions, technical

specifications, trouble shooting etc.

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

Repair - general information

Before repairing the handheld hydraulic breakers,

read the following in order to avoid incorrect repair

and damage to the breaker.

Repair other than in accordance with the

instructions given may subject the breaker to

conditions beyond the design capability, which may

result in system failure.

Notice leakages and defects before disassembly

- if necessary, consult the Trouble shooting section

in the safety and operating instructions. Test the

breaker with test equipment - a defect is easier to

find, when you have a presumption.

Danger

The breaker has a pressure accumulator. This

accumulator is pressurized even when there is no

hydraulic pressure to the breaker.

Attempting to dismantle the accumulator without

first releasing the pressure can cause personal

injury or death. The nitrogen gas pressure (N2)

must be released before carrying out further

dismantling. This procedure must be carried out by

a qualified person.

Warning

Do not repair the breaker when connected to the

hydraulic power source.

Torque settings

Use only the torque settings specified in the spare

parts list.

Caution

All bolts used on Atlas Copco equipment are high

tensile and may not under any circumstances be

replaced by bolts of a lesser tensile specification.

Special tools for repair

Punches (scrapers)

ø14 mm: Part number 3371 8156 07

ø37 mm: Part number 3371 8156 06

ø44 mm: Part number 3371 8206 14

ø47 mm: Part number 3371 8206 20

Tool for accumulator

Part number 3371 8077 60

Filling device

Part number 3371 8011 55

This part number includes the above tool for

accumulator part number 3371 8077 60

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

Disassembly

Main components

1. Mount the breaker in a vice

2. Loosen the nose part (a torque wrench can

also be used)

3. Dismount the nose part

4. Remount the breaker in the vice

5. Hammer the nabs away from the screws

6. Loosen the four screws

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

7. Remove the screws

8. Remove the handle from the accumulator

9. Loosen the four screws on the accumulator

10. Remove the accumulator

11. Remove the trigger valve

12. Loosen the screws in the valve housing

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

13. Remove the valve housing from the

cylinder

14. Remove the striking piston from the

cylinder

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E

No. 3392 5143 01

2008-02-29

Overhauling instructions

Nose part

1. Mount the nose part in a vice

2. Hammer out the two roll pins and remove

the latch

3. Remove the lock pin and the spring

4. Remove the locking ring

5. Remove the chisel bellows

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