Hydraulic Pump (Gear); Removal; Assembly/Disassembly; Installation - JLG 600SC Service And Maintenance Manual

5.3 HYDRAULIC PUMP (GEAR)

Removal

ENSURE THE PRESSURE IS PROPERLY RELIEVED FROM THE HYDRAULIC SYS-
TEM BEFORE PROCEEDING TO REMOVAL OF THE PUMP MOTOR.
1. Disconnect the hydraulic hoses from inlet and outlet
ports of the gear pump.
CAP ALL THE HYDRAULIC HOSES TO PREVENT ENTRAPPING OF THE DUST AND
DIRT INTO IT.
2. Remove bolts and washers secured on the gear pump.
3. Carefully dislodge the gear pump shaft from the rear
piston pump assembly.
4. Carefully place the gear pump on the clean working sur-
face.
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SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS

Assembly/Disassembly

For detail assembly/disassembly instructions, contact local JLG
or JLG dealer for information.

Installation

DISASSEMBLY OF THE CYLINDER SHOULD BE PERFORMED ON A CLEAN WORK
SURFACE IN A DIRT FREE WORK AREA.
Figure 5-66. Hydraulic Pump Installation
1. Check for gear teeth on shaft for scoring, pitting taper-
ing and damage. If damaged need to be replaced with a
new assembly completely.
2. Apply thin film of spline grease on the gear shaft.
3. Carefully insert the shaft into the piston pump and
secure the gear pump using two bolts and washers.
Apply JLG Threadlocker P/N 0100011 to end of bolts.
Torque bolts to 20-24 ft.lbs (27-33 Nm).
4. Remove cap from the hydraulic hoses and re-connect to
their original locations.
GEAR PUMP
WASHER BOLT
WASHER
BOLT
MAE24890
5-77