Service Training
Page 1
Section 2.1
2 LINDE ELECTRIC FORK TRUCK E 20 / 25 / 30 SERIES 336
2.1 DRIVE - MOTOR
The electric fork trucks are powered by DC series-wound motors. DC series-wound motors develop the
highest torque of all electric motors. In series-wound motors the field winding is connected in series to the
armature.
The field windings terminals D1 and D2 and the armature winding terminals A1 and A2 are marked. They
are lead out of the motor separately. The traction motor direction is reversed by reversing the armature field.
A speed sensor is installed on the left-hand traction motor for sensing the motor RPM and direction of rotation.
2.1.1 TRACTION MOTOR TO 6/95
Type: DC series-wound motor with armature reversal
Model: E 20 GF 144-14/5.4
E 25 / 30 GF 146-14/7.8
Voltage: 80 V
Power: E 20 5.0 kW S2 (60 min rating)
E 25 / 30 6.4 kW S2 (60 min rating)
Type of protection: IP00 / IP23 DIN 40 050
Brush dimensions: 12.5x40x40 mm
Permissible wear: down to 16 mm
Collector diameter: original 104 mm
Reworking down to: 100 mm
Components: 2 thermal switches; 1 normally open operates at 80 °C; 1 normally closed
operates at 160 °C; brush monitoring, speed sensor on left-hand motor
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