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TM 5-2420-222-34
14-22.
BACKHOE SWING CYLINDER ASSEMBLIES REPAIR (Con’t).
2.
Coat new rod packing (18), new wear ring (17), new preformed packing (21), new backup washer or ring (2), and
new seal (13) with hydraulic fluid.
3.
Install rod packing (18), wear ring (17), preformed packing (21), backup washer or ring (20), and seal (13) in place
on valve stem guide (16).
4.
Using retaining ring pliers, install retaining ring (19) in valve stem guide (16).
5.
Install valve stem guide (16) with assembled parts in place on piston rod (11).
6.
Coat new preformed packings (23 and 24), packing nut (22), new wear ring (9), and piston ring (7) with hydraulic
7.
Install preformed packings (23 and 24), packing nut (22), wear ring (9), and piston ring (7) in place on piston (8).
fluid.
8.
Place piston rod (11) in vise with caps. Tap piston (8) with assembled parts in place on piston rod.
9.
Install new self-locking nut (6) on piston rod (11) and remove piston rod from vise.
10.
Place actuating cylinder (5) in vise with caps. With the aid of an assistant, install piston rod (11) with assembled
parts in actuating cylinder.
11.
Using spanner wrench, tighten valve stem guide (16) in actuating cylinder (5).
12.
Install two lubrication fittings (10) in actuating cylinder (5). Install lubrication fitting in piston rod (11).
TA701623
14-109
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