30
45-074, REV. 5/18
5.13 Cylinder Assembly
1. Spray the piston, gland cap and seals with WD40 or
other similar product to ease slipping of the seals in
place. (Figure 5-40)
2. Note the direction of the seal on the piston. Improper
installation will result in poor performance. The cupped
side or O-ring side of the seal should be facing the
gland cap. (Figure 5-45)
Cylinder Rod
Locknut
Piston
Wear Ring
Washer
Seal
O-Ring
Figure 5-45, Piston Seal
3. Use a spanner wrench or similar tool to unscrew the
gland cap from the cylinder tube. (Figure 5-42)
3. Install the seals and wipers in the gland cap. Note the
direction of the seals. The cupped side or O-ring side of
the seal should be facing the piston. (Figure 5-46)
F
H
Locknut
Piston
Seal
Wear Ring
Cylinder Rod
Cylinder Rod
Gland Cap
Wiper Ring
Seal
O-Ring
Backup
Ring
Figure 5-46, Gland Cap Seal
4. Install the piston on the rod and tighten the locknut to
70-75 ft-lbs.
5. Spray the inside of the cylinder tube with lubricant to
ease inserting the rod and piston. Insert the rod and
piston into the cylinder tube. Tap the rod in with a rub-
ber mallet if resistance is encountered.
6. Install the gland cap on the cylinder rod being extreme-
ly careful not to cut the rod seal on the threads of the
rod or rod shoulder. If available, use a sleeve or plastic
electrical tape to cover the rod threads.
7. Tighten the gland cap using a spanner wrench.
5.14 Swivel Assembly Removal
1. Turn off the truck’s power and activate the hydraulic
functions in both directions several times to relieve
the built up hydraulic pressure.
