Composite Bearing Installation - JLG 400S Service And Maintenance Manual

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SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS

NOTE: Install pin into the composite bearing dry. Lubrication is

not required with nickel plated pins and bearings.

Figure 5-90. Composite Bearing Installation

14. Inspect spacer for burrs and sharp edges. If necessary,

dress inside diameter surface with Scotch Brite or equiv-

15. Inspect o-ring groove in spacer for burrs and sharp

edges. Dress applicable surfaces as necessary.

16. Inspect port block fittings and holding valve. Replace if

17. Inspect the oil ports for blockage or the presence of dirt

or other foreign material. Repair if necessary.

18. Inspect piston rings for cracks or other damage. Replace

if necessary.

NOTE: Prior to cylinder assembly, ensure that the proper cylinder

seal kit is used. See your JLG Parts Manual.

NOTE: Apply a light film of hydraulic oil to all components prior to

1. A special tool is used to install a new rod seal into the

applicable cylinder head groove.

Figure 5-91. Rod Seal Installation

WHEN INSTALLING NEW SEALS, ENSURE SEALS ARE INSTALLED PROPERLY.

IMPROPER SEAL INSTALLATION COULD RESULT IN CYLINDER LEAKAGE AND

IMPROPER CYLINDER OPERATION.

WEAR RING BACKUP RING

Figure 5-92. Cylinder Head Seal Installation

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