Service Manual Instruction Manual

SECTION 5 - HYDRAULICS
5-54 – JLG Lift – 3121616
Assembly
NOTE: Apply a light film of hydraulic oil to all components before
assembly.
1. Position cylinder barrel in a suitable holding fixture.
IMPROPER SEAL INSTALLATION CAN CAUSE CYLINDER LEAKS AND IMPROPER
CYLINDER OPERATION.
2. Install Spanner Nut (13) on Rod (6).
3. Install Rod Seal (10) and Wiper (12) in Cylinder Head (7).
4. Install Backup Ring (9), O-Ring (8), and O-Ring (11).
Figure 5-119. Cylinder Head Assembly
5. Install O-Ring (3) and two seals (2) in piston groove.
Figure 5-120. Piston Seal and Wear Ring
INSERTING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL
SURFACES. USE EXTREME CARE INSTALLING CYLINDER ROD AND PISTON.
6. Insert Rod Assembly in Barrel.
7. Apply Locking Primer and Loctite 242 (or equivalent) to
threads of Spanner Nut (3). Tighten spanner nut (13)
with hook spanner to 57-63 ft-lb (77-85 Nm).
Figure 5-121. Spanner Nut Torque
6
10
13
9
8
7
11
12
2
2
3
1
4
4
57-63 ft-lb (77-85 Nm)