JLG 600SC Service And Maintenance Manual page 217

SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
Figure 5-47. Composite Bushing Installation
14. Inspect travel limiting collar or spacer for burrs and
sharp edges. If necessary, dress inside diameter surface
with Scotch Brite or equivalent.
15. If applicable, inspect port block fittings and holding
valve. Replace as necessary.
16. Inspect oil ports for blockage or presence of dirt or other
foreign material. Repair as necessary.
17. If applicable, inspect piston rings for cracks or other
damage. Replace as necessary.
ASSEMBLY
INCORRECT SEAL INSTALLATION CAN CAUSE CYLINDER LEAKS AND IMPROPER
C YLINDER OPERATION. ENSURE ALL PISTON SEALS ARE CORREC TLY
INSTALLED. REFER TO CROSS SECTION ILLUSTRATIONS FOR CORRECT SEAL
ORIENTATION.
NOTE: Use correct cylinder seal kit for cylinder assembly. See your

JLG Parts Manual.

Apply a light film of hydraulic oil to all components before
assembly.
1. Support rod in holding fixture.
2. Install backup ring (6), rod seal (7), and dry bearing (8) in
cylinder head (3).
3. Install wiper (4) and retaining ring (5) in cylinder head.
4. Install O-ring (11) on cylinder head.
5. Install backup ring (10) and O-ring (9) on cylinder head.
6. Slide cylinder head assembly on rod (2) to rod end. Do
not dislodge or damage seals.
5-70
Figure 5-48. Cylinder Head Seal Installation
Figure 5-49. Cylinder Head Assembly
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