Atlas Copco LWP User manual

Overhauling instructions
Hydraulic submersible water pump
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
LWP 2
LWP

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Contents
Contents
English ...................................................................4

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Contents
Contents
ABOUT THE OVERHAULING INSTRUCTIONS.....................................5
SPECIAL TOOLS FOR REPAIR .................................................6
DISASSEMBLY - ASSEMBLY ...................................................7
ENGLISH

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
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 LWP 2 water pump.
Only qualified and trained persons may operate or maintain the pump. 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 pump, 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 LWP 2 water pump regarding safety instructions, technical specifications,
trouble shooting etc.

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
Special tools for repair
Mandrel for lip seal
Part number 3376 7184 35
Mandrel for assembly
Part number 3376 7184 85
Special spanner
Part number 3376 7184 86
Using the special tools when repairing the
LWP 2 water pump will ensure a quick, smooth
and precise mounting of seals and bearings
without any damage. However, repair can also
be done with similar tools made locally (see
below sketches):
Dimensions of 3376 7184 35
Dimensions of 3376 7184 85
Dimensions of 3376 7184 86

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
Disassembly - assembly
1. Disassembly: Dismount the four M6x25 insex
screws and washers. Assembly: Use the
reverse order - and remember to place
2 x washers at the insex screws
2. Disassembly: Dismount the hydraulic motor.
Assembly: Mount the hydraulic motor and
make sure that the motor shaft fits into the
coupling shaft
3. Disassembly: Remove the coupling "dog
shaft". Assembly: Mount the coupling "dog
shaft" and make sure it fits into the shaft
4. Disassembly: Dismount the four cap screws
M6x20 and washers. Assembly: Use the
reverse order - and remember to place
2 x washers at the cap screws

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
5. Disassembly: Dismount the bearing housing
from the pump housing. If necessary, use
a soft hammer to loosen. Assembly: Place
the gasket between the bearing and the
pump housing
6. Disassembly: Remove the bearing housing.
Assembly: Place the bearing housing
7. Disassembly: To keep the shaft in place,
the special spanner (service tool) can be
used. Alternatively, a screwdriver can be
used to hold the blade. Assembly: Use the
reverse order
8. Disassembly: Remove the insex screw
M8x16 and the washer from the blade.
Assembly: Mount the insex screw M8x16 and
the washer (use Loctite or similar)
9. Disassembly: Remove the blade by using
two screwdrivers or a puller. Assembly:
Mount the blade and ensure correct fitting
(key) at the shaft
10. Disassembly: Remove the circlip J47 from
the bearing housing. Assembly: Mount the
circlip J47 into the bearing housing

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
11. Disassembly: Remove the water protection
seal. Assembly: Mount the water protection
seal
12. Disassembly: Remove the circlip J47,
below the water protection seal, from the
bearing housing. Assembly: Mount the
circlip J47 into the bearing housing
13. Disassembly: Remove the bearing
carefully by means of a mandrel and a
hammer. Assembly: Mount the bearing
carefully into the bearing housing
14. Disassembly: Remove the roll pin ø3x20
with a punch. Assembly: Mount the roll pin
ø3x20 with a hammer
15. Disassembly: Mount the seal retainer with
the lip seal onto the shaft by using mandrel
for lip seal (service tool 3376 7184 35) to
ensure that the lip seal is mounted without
any damage. Assembly: Remove the seal
retainer with lip seal

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
16. Disassembly: Remove the high-pressure
lip seal from the seal retainer by means of
a screwdriver or similar. Assembly: Mount
the lip seal into the seal retainer by means
of a mandrel ø30 (service tool) or similar
17. Disassembly: Remove the circlip A20 from
the shaft upper part above the bearing ø20
high-pressure. Assembly: Mount one circlip
A20 above the bearing ø20 high-pressure.
The mandrel ø20.6 (service tool) is useful
for mounting O-rings onto the shaft
18. Disassembly: Turn the shaft and bearing
around and remove the circlip A20.
Assembly: Turn the shaft and bearing
around and mount the circlip A20. The
mandrel ø20.6 (service tool) is useful for
mounting O-rings onto the shaft
19. Disassembly: Remove the bearing ø20
high-pressure with light strokes from a soft
hammer. Assembly: Mount the shaft into
the ø20 bearing with light strokes from a
soft hammer. Secure fully back up of the
bearing when mounting the shaft

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LWP 2
© 2008 Atlas Copco Construction Tools AB | No. 3392 5151 01 | 2008-03-04
Overhauling instructions
20. Main parts of the bearing housing

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© 2008 Atlas Copco Construction Tools AB, Stockholm, Sweden
|
No. 3392 5151 01
|
2008-03-04
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
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