Gear Pump; Removal; Installation - JLG H340AJ Service And Maintenance Manual

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

5.5 GEAR PUMP

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 pump
motor.
BOLT & WASHER
OUTLET PORT
5-82
PUMP MOTOR
OUTLET PORT
FRONT PUMP
GEAR SHAFT
Figure 5-40. Gear Pump
4. Carefully place the gear pump on the clean working sur-
face.

Installation

DISASSEMBLY OF THE CYLINDER SHOULD BE PERFORMED ON A CLEAN WORK
SURFACE IN A DIRT FREE WORK AREA.
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 pump motor and
secure the pump using two bolts and washers.
4. Remove cap from the hydraulic hoses and re-connect to
their original locations.
REAR PUMP
INLET PORT
MAE15220B
3121634