JLG 1500SJ Service Manual - Manual (Page 382)

SECTION 5 - HYDRAULICS
5-30 – JLG Lift – 3121262
12. Inspect cylinder head outside diameter for scoring
or other damage and ovality and tapering. Replace
as necessary.
13. If applicable, inspect rod and barrel bearings for
signs of correct excessive wear or damage. Replace
as necessary.
a. Thoroughly clean hole, (steel bushing) of burrs,
dirt etc. to facilitate bearing installation.
b. Inspect steel bushing for wear or other damage.
If steel bushing is worn or damaged, rod/barrel
must be replaced.
c. Lubricate inside of the steel bushing with WD40
prior to bearing installation.
d. Using an arbor of the correct size, carefully
press the bearing into steel bushing.
NOTE: Install pin into the composite bearing dry. Lubrication
is not required with nickel plated pins and bearings.
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 the oil ports for blockage or the 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
NOTE: Prior to cylinder assembly, ensure that the proper
cylinder seal kit is used. See your JLG Parts Manual.
Apply a light film of hydraulic oil to all components
prior to assembly.
1. A special tool is used to install a new rod seal into
the applicable cylinder head gland groove.
WHEN INSTALLING NEW SEALS, ENSURE SEALS ARE INSTALLED
PROPERLY. IMPROPER SEAL INSTALLATION COULD RESULT IN
CYLINDER LEAKAGE AND IMPROPER CYLINDER OPERATION.
Figure 5-63. Composite Bearing Installation
Figure 5-64. Rod Seal Installation
Figure 5-65. Cylinder Head Seal Installation