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TM 5-2420-222-34
14-19.
BACKHOE CROWD CYLINDER ASSEMBLY REPAIR (Con’t).
d.
ASSEMBLY
NOTE
Perform step 1 only If sleeve bushings were removed.
1.
Drive sleeve bushing (18 or 28) in piston rod (19) or actuating cylinder (29).
2.
Coat new V-packing (23), new wear ring (22), and wiper seal (20) with hydraulic fluid.
3.
Install V-packing (23), wear ring (22), and wiper seal (20) in place on valve stem guide (21).
4.
Using retaining ring pliers, install retaining ring (24) in valve stem guide (21).
5.
Install valve stem guide (21) with assembled parts in place on piston rod (19).
6.
Coat two new preformed packings (12 and 26), piston ring (10) and packing retainer (25) with hydraulic fluid.
7.
Install two preformed packings (12 and 26), piston ring (10) and packing retainer (25) in place on piston (11).
8.
Place piston rod (19) in vise with caps. Tap piston (11) with assembled parts in place on piston rod.
9.
Coat new V-packing (13) and new wear ring (14) with hydraulic fluid.
10.
Install V-packing (13) and wear ring (14) in place on piston (15). Tap piston with assembled parts in place on
piston rod (19).
11.
Install nut (16) on piston rod (19) and remove piston rod from vise.
12.
Place actuating cylinder (29) in vise with caps. With the aid of an assistant, install piston rod (19) with assembled
parts in actuating cylinder.
13.
Using spanner wrench, tighten valve stem guide (21) In actuating cylinder (29). Install setscrew (9).
14.
Install lubrication fittings (17 and 27) in piston rod (19) and actuating cylinder (29).
NOTE
Steps 15 through 17 apply only to loader backhoes with serial numbers 235786-
235999.
15.
Install two tubes and fittings (7) and new preformed packings (8) In actuating cylinder (29).
16.
Install two adapters (2) and new preformed packings (1) in actuating cylinder (29).
17.
Install two new self-locking nuts (6), preformed packings (3), ferrules (5) and packing retainers (4) on adapters (2).
18.
Remove hydraulic cylinder (29) with assembled parts from vise.
FOLLOW-ON TASKS:
•
Install backhoe crowd cylinder assembly (see TM 5-2420-222-20).
14-93
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