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ASSEMBLE BOOM, ARM OR BUCKET CYLINDER - Continued
ASSEMBLE BOOM, ARM OR BUCKET CYLINDER - Continued

Maintenance Manual For Hydraulic Excavator 230Lcr And 230Lcrd With Rock Drill 2
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TM 5-3805-280-24-2
Hydraulic System
14. Check the cap seal, seal must fit tight against O-ring
and not turn. If seal can be turned, it has been
stretched too much and can be damaged during
assembly into cylinder barrel.
15. For a cap seal that has been stretched too much,
shrink it to its original size using a ring compressor or
a plastic tie band and hose clamp.
When using a ring compressor, put a piece of shim
stock between cap seal and compressor at the joint
so it does not damage seal.
When using a plastic tie band and hose clamp, grind
a taper on one end of tie band. Install tie band with
the taper against cap seal. Before tightening the hose
clamp, check to be sure tie band is under hose clamp
all around piston.
TX,33,UU3814 1907JAN9710/17
16. Install a backup ring (C) on each side of cap seal.
17. Install the buffer seals (B) and wear rings (A).
Turn the seals and rings so the slits are 180 from
each other
A--Wear Ring
B--Buffer Seal
33
C--Backup Ring
3360
175
Continued on next page
TX,33,UU3814 1907JAN9711/17
21-207


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