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TM 5-2420-222-34
14-21.
BACKHOE BUCKET CYLINDER ASSEMBLY REPAIR.
3.
Remove two return tubes (2) and preformed packings (1) from actuating cylinder (10). Discard preformed
packings.
4.
Place actuating cylinder (10) in vise with caps.
5.
Remove setscrew (9) from actuating cylinder (10).
6.
Using spanner wrench, loosen linear actuating cap (22) from actuating cylinder (10). Slide linear actuating cap
back onto piston rod (20).
NOTE
Use a drain pan to catch fluid when draining actuating cylinder. Clean up all spills.
7.
Loosen vise and tilt actuating cylinder (10) to drain hydraulic fluid.
8.
Tighten vise. With the aid of an assistant, remove piston rod (20) with assembled parts from actuating cylinder
(10).
9.
Remove actuating cylinder (10) from vise.
10.
Place piston rod (20) in vise with caps. Remove self-locking nut (12) from piston rod. Discard self-locking nut.
11.
Tap piston (17) with assembled parts loose and remove from piston rod (20). Remove piston rod from vise.
12.
Remove linear actuating cap (22) with assembled parts from piston rod (20).
13.
Remove piston ring (13), piston ring (14), packing assembly (15), and preformed packing (16) from piston (17).
Discard piston rings and preformed packing.
14.
Using retaining ring pliers, remove retaining ring (27) from linear actuating cap (22).
15.
Remove V-packing (26), preformed packing (25), preformed packing or packing retainer (24), wear ring (23), and
wiper seal (21) from linear actuating cap (22). Discard V-packing, preformed packings, packing retainer, wear
ring, and wiper seal.
TA701616
14-100
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