Assembly - JLG 660SJ Service And Maintenance Manual

SECTION 5 - HYDRAULICS

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 (3) on Rod (6).
3. Install Rod Seal (5) and Wiper () in Cylinder Head (3).
4. Install O-Ring (7), Backup Ring (8), and O-Ring (9).
Figure 5-75. Cylinder Head Assembly
5-36
5. Install wear ring (11) in piston groove.
6. Install seal (10) in piston groove.
Figure 5-76. Piston Seal and Wear Ring
INSERTING ROD OFF-CENTER CAN DAMAGE PISTON AND CYLINDER BARREL
SURFACES. USE EXTREME CARE INSTALLING CYLINDER ROD AND PISTON.
7. Insert Rod Assembly in Barrel (1).
8. Apply Locking Primer and Loctite 242 (or equivalent) to
threads of Spanner Nut (3). Tighten spanner nut (3) with
hook spanner to 57-63 ft-lb (77-85 Nm).
Figure 5-77. Spanner Nut Torque
– JLG Lift – 3121298