JLG 680S, Service And Maintenance Manual

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SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
5-24 3121234
NOTE: Install pin into the composite bearing dry. Lubrication is
not required with nickel plated pins and bearings.
12. Inspect the oil ports for blockage or the presence of dirt
or other foreign material. Repair as necessary.
13. Inspect piston rings for cracks or other damage. Replace
if necessary.
ASSEMBLY
NOTE: Prior to cylinder assembly, ensure that the proper cylinder
seal kit is used. See the respective JLG Parts Manual.
NOTE: 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 5-49. Composite Bearing Installation
Figure 5-50. Rod Seal Installation
BACKUP
RING
O-RING
RETAINER
RING
ROD SEAL
WIPER SEAL
Figure 5-51. Cylinder Head Seal Installation