Service Training
Section 2.7
Page 1
2.7 HYDRAULIC SYSTEM
2.7.1 HYDRAULIC PUMP MOTOR
Type: DC compound-wound motor
Model: GF 144-14/4.3
Voltage: 80 V, 200 A, 2550 rpm
Power: 13.5 kW S3 15%
Type of protection: IP00/23
Insulation class: F
Carbon brushes: 12.5x40x40 mm with dust groove
Admissible wear: down to 16 mm
Equipment: Motor brush monitor - thermal switch to series 6/95; thermal sensor from series
7/95, speed sensor
2.7.2 RENEWING THE HYDRAULIC PUMP MOTOR BRUSHES
- Tilt the overhead guard to the 2nd detent.
- Remove the hydraulic pump motor brushes.
- Lift up the brush springs.
- Pull the brushes out of their guides.
- Renew the brushes.
2.7.3 REMOVING THE HYDRAULIC PUMP UNIT
- Tilt the overhead guard to the 2nd detent.
- Loosen the hose clamp on the hydraulic reservoir and disconnect the suction line.
- Screw off the hydraulic pump supply line P at the steering control valve.
- Remove the air duct.
- Disconnect the connector 2X7 from the pump motor to the main cable harness.
- Disconnect the speed sensor connector 2X2.
- Remove the cover on top of the sensor transmitter.
- Screw an eyebolt into the motor shaft.
- Lift the hydraulic pump unit out of the vehicle with suitable lifting equipment.
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