JLG 1850SJ Service Manual - Manual (Page 185)

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
3121619 – JLG Lift – 5-15
d. Press bushing in barrel or rod bushing with correct
size arbor.
14. Inspect spacer for burrs and sharp edges. If necessary,
dress inside diameter surface with Scotch Brite or equiv-
alent.
15. Inspect port block fittings and holding valves. Replace
as necessary.
16. Inspect oil ports for blockage or presence of dirt or other
foreign material. Repair as necessary.
ASSEMBLY
IMPROPER SEAL INSTALLATION CAN CAUSE CYLINDER LEAKS AND IMPROPER
CYLINDER OPERATION.
NOTE: Use proper cylinder seal kit for cylinder assembly. See your
JLG Parts Manual.
Apply a light film of hydraulic oil to all components before
assembly.
1. Install backup ring and o-ring in outside diameter
grooves of cylinder head.
3. Install rod seal, wiper ring, and wear rings in cylinder
head as shown.
4. Slide washer ring on rod. Install cylinder head assembly
(8) on rod. Do not damage or dislodge wiper and rod
seals. Push cylinder head to rod end.
5. Install spacer on rod.
6. Install backup ring, O-ring, and backup ring in inside
grooves of piston.
7. Install hydrolock seals and guidelock rings in outer
grooves of piston.
8. Using suitable protection, clamp cylinder rod in a vise or
similar holding fixture as close to piston as possible.
Arbor
Barrel or
Rod Bushing
Composite
Bushing
Composite
Bushing
Figure 5-15. Bushing Installation
Figure 5-16. Cylinder Head Seal Installation
Figure 5-17. Piston Seal Kit Installation