JLG 510AJ Service Manual - Manual (Page 251)

SECTION 5 - HYDRAULICS AND HYDRAULIC SCHEMATICS
3121181 – JLG Lift – 5-31
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 retaining ring (3), O-ring (2), seal (5), and wiper (4)
in Cylinder Head (6).
3. Install O-ring (9), backup ring (7) and O-ring (8).
4. Repeat for other cylinder head.
Figure 5-67. Cylinder Head Assembly
5. Install seal (11) in piston groove on rod (12).
6. Install two wear rings (10).
Figure 5-68. 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 and piston assembly in barrel until centered.
8. Install two cylinder head assemblies (6) on barrel (1).
Torque with hook spanner to 295 ft-lb (400 Nm).
Figure 5-69. Cylinder Head Installation
6
2
3
4
5
9
8
7
12
10
10
11