JLG 18RS Service Manual - Manual (Page 103)

SECTION 5 - HYDRAULICS
3121284 – JLG Lift – 5-13
12. Inspect cylinder head outside diameter for scoring or
other damage and ovality and tapering. Replace as nec-
essary.
13. If applicable, inspect rod and barrel bearings for signs of
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.
W H E N I N S TA L L I N G N E W S E A L S , E N S U R E S E A L S A R E
INSTALLED PROPERLY. IMPROPER SEAL INSTALLATION
COULD RESULT IN CYLINDER LEAKAGE AND IMPROPER
CYLINDER OPERATION.
Figure 5-15. Composite Bearing Installation
Figure 5-16. Rod Seal Installation
Figure 5-17. Cylinder Head Seal Installation