Service Training
Table of Contents
Page 2
4 Steering system and wheels 1
4.1 Servostat 1
4.2 Curve sensors 2
4.2.1 Adjusting the curve sensors 2
4.2.2 Removing and installing a curve sensor 3
4.3 Drive wheels 4
4.3.1 Checking the leakage resistance of the drive wheels 4
5 Control elements 1
5.1 Travel control 1
5.1.1 Accelerator Sensor 2
5.1.2 Checking the output signals of the accelerator sensor in the intrinsically safe circuit 3
5.1.3 Removing and installing the accelerator sensor 5
5.2 Brake control 8
5.2.1 Renew the brake Pads 8
5.2.2 Adjusting the foot brake 11
5.2.3 Adjusting the hand brake 12
6 Electrical system 1
6.1 Pressure resistant fully enclosed housing 2
6.1.1 Maintenance on pressure resistant housings 2
6.1.2 Control housing 2
6.1.3 Pressure resistant housing for Exciter resistor 1R2 (Up to 10.96) 3
6.1.4 Pressure resistant housing for voltage transformer 3
6.2 Checking the sealing function of PG-fittings 4
6.3 Checking condition and tight fit of electric cables 4
6.4 Checking the insulation resistance of the electrical system 5
6.5 Intrinsically safe electric circuits 6
6.5.1 Buffer amplifier, function and description 6
6.5.2 Internal circuit diagram of a buffer amplifier 7
6.5.3 Checking the function of the buffer amplifiers 8
6.5.4 Replacing the buffer amplifier 11
6.6 Function and description of the Zener barrier 14
6.6.1 Terminal designation on the Zener barrier 14
6.6.2 Internal circuit diagram of the Zener barrier 15
6.6.3 Checking the internal resistance of the Zener barriers 16
6.6.4 General function of the Zener diodes 17
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