LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E housing (new type) LH 22-LH 40 E 1. Parts to be used 2. P and T location (written on housing) 3. P and T guide sockets 4. Mount the O-rings

Overhauling instructionsHandheld hydraulic breakers

© 2008 Atlas Copco Construction Tools AB | No. 3392 5143 01 | 2008-02-29

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

3

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


Contents

Contents

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

4

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


Contents

ContentsAbOut tHE OvErHAuLing instruCtiOns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

repair - general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6torque settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

spECiAL tOOLs fOr rEpAir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

DisAssEmbLy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7nose part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10valve housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11trigger valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15E-handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

AssEmbLy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19valve housing LH 11-LH 19 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19valve housing (new type) LH 22-LH 40 E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27mounting of bushing in nose part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31mounting of latch in nose part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32Adjustment of E-handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

EngLisH

5

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


Overhauling instructions

About the Overhauling instructionsThe 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 specificationsPlease 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.

6

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



repair - general informationBefore 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.

DangerThe 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.

WarningDo not repair the breaker when connected to the hydraulic power source.

torque settingsUse only the torque settings specified in the spare parts list.

CautionAll 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 accumulatorPart number 3371 8077 60

Filling devicePart number 3371 8011 55This part number includes the above tool for accumulator part number 3371 8077 60

7

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



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

8

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



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

9

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



13. Remove the valve housing from the cylinder

14. Remove the striking piston from the cylinder

10

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



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

11

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



valve housing

1. Mount the valve housing in a vice

2. Loosen and remove the P guide socket

3. Loosen and remove the T guide socket

4. Remove the spool

12

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



trigger valve

1. Remove the packing gland from the trigger

2. Remove the O-ring and the seal from the packing gland

3. Remove the trigger spool from the trigger rod

4. Remove the Seeger spring ring

5. Remove the O-ring, the back-up ring and the Seeger spring ring from the trigger spool

13

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



Accumulator

DangerThe 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.

1. Check for gas by means of filling device (part number 3371 8011 55)

2. - or by means of a blunt tool

3. Mount the accumulator in a vice

4. Loosen the charging screw on the cover

5. Loosen the accumulator cover by means of tool for accumulator (part number 3371 8077 60)

14

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



6. Remove the accumulator cover

7. Remove the diaphragm

8. Check the diaphragm for defects

15

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



Cylinder

1. Mount the cylinder in a vice


3. Remove the seal


5. Remove the seal and the back-up washer

16

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



E-handle

1. E-handle without top cover

2. Puncture the rubber handles

3. Remove the rubber handles with compressed air (while pulling the handles)

4. Hammer out the roll pin

5. Remove the trigger lever

17

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



6. Hammer out the left and right latch pin with a punch. Remove and replace the trigger pawl if necessary

7. Remove the four springs

8. Hammer out the two roll pins (with a punch) across from each other

9. Remove the bottom plate

10. Remove the handle rod

18

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



11. Remove the eight nylon guides from the frame. Replace and grease the nylon guides when assembling

12. Main parts of the E-handle

note: The old E-handle with damping element must be replaced by the new E-handle with springs described here (see the spare parts list).

19

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



Assembly

valve housing LH 11-LH 19 E

1. Parts to be used

2. P and T location (written on housing)

3. Mount the O-rings (at both the T and the P side)

4. P and T guide sockets

5. Mount the O-rings on the guide socket

6. Mount the auxiliary spool at the P side

20

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



7. Incorrect mounting of the auxiliary spool

8. Oil the guide sockets

9. Apply Loctite or similar to the guide socket thread

10. Mount the P guide socket at the P side

11. Mount the spool at the T side (notice the milling pointing to the T side)

12. Mount the T guide socket at the T side

21

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



13. Tighten the guide sockets with the torque wrench

14. Check the movement of the spool by shaking it from side to side

22

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



valve housing (new type) LH 22-LH 40 E

1. Parts to be used

2. P and T location (written on housing)

3. P and T guide sockets

4. Mount the O-rings on the guide sockets

5. Oil the guide sockets (not the thread)

23

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



6. Apply Loctite or similar to the guide socket thread

7. Mount the spool at the T side (notice the milling)

8. Apply Loctite or similar to the spool thread

9. Tighten the guide sockets with the torque wrench

10. Place the steel ball and the washer

11. Apply Loctite or similar and tighten the screw

24

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



Cylinder

1. Parts to be used

2. Mount the seal (green)

3. Mount the back-up washer and the locking ring

4. Mount the seal on a punch (see "Special tools for repair"

5. Mount the seal with an engineer's hammer

6. Mount the locking ring

25

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



Accumulator

1. Parts to be used

2. Mount the diaphragm

3. Oil the diaphragm where the cover seals on the diaphragm

4. Grease the accumulator cover with copper grease

5. Mount the accumulator cover in the body

6. Tighten the accumulator cover by means of tool for accumulator (part number 3371 8077 60)

26

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



7. Mount the charging screw and the seal ring

8. Charge the accumulator with Nitrogen gas by means of filling device (part number 3371 8010 55). Charging pressure: LH 11, 18 and 19 E: 40 bar Other breakers: 50 bar

27

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



main components

1. Oil the seals in the cylinder

2. Mount the striking piston in the cylinder

3. Grease the O-ring grooves on the cylinder

4. Mount the O-rings

5. Apply Loctite or similar to the cylinder thread

6. Mount the valve housing

28

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



7. Mount the washers and the screws in the valve housing using Loctite or similar

8. Tighten the screws in the valve housing:

9. Check the movement of the striking piston in the valve housing

10. Check the movement of the striking piston in the valve housing

11. Grease the O-ring grooves in the valve housing

12. Mount the O-rings

29

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



13. Mount the trigger valve

14. Apply Loctite or similar to the valve housing threads

15. Mount the accumulator

16. Tighten the screws on the accumulator:

17. Mount the nose part

18. Apply Loctite or similar to the screws

30

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



19. Mount the screws on the nose part and tighten them

31

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



mounting of bushing in nose part

1. Mount the nose part in a hydraulic press designed for min. 10 t

2. Mount the bushing in a suitable punch

3. Place the nose part

4. Apply Loctite or similar to the bushing

5. Check the length of the bushing and mark it

6. Press the bushing into the nose part with a pressure of approx. 10 t

32

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



mounting of latch in nose part

1. Grease the lock pin and the spring with copper grease

2. Mount the lock pin and the spring in the nose part

3. Place the latch

4. Place the nose part on an anvil

5. Hammer the bigger roll pin with the opening against the bottom of the nose part

6. Mount the smaller roll pin with its opening opposite the bigger one

33

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



7. It should look like this

8. Check that the latch is moveable and that the spring and pin lock it in two positions

34

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



Adjustment of E-handle

1. Mount the handle on the breaker

2. Activate the trigger lever

3. Adjust the trigger pawl to a clearance of 1-2 mm. The sliding surface should align with the breaker to keep the trigger from pulsating

www.atlascopco.com

© 2

008

Atla

s C

opco

Con

stru

ctio

n To

ols

AB

, Sto

ckho

lm, S

wed

en |

No.

339

2 51

43 0

1 | 2

008-

02-2

9

Any unauthorized use or copying of the contents or any part thereof is prohibited. This applies in particular to trademarks, model denominations, part numbers and drawings.

Documents

LH 11, 18, 19 E, 22, 23 E, 27, 28 E, 39, 40 E housing (new type) LH 22-LH 40 E 1. Parts to be used 2. P and T location (written on housing) 3. P and T guide sockets 4. Mount the O-rings