Taylor-Dunn B0-T48-48 Taylor Truck T48 Operation Manual page 110

Electrical Troubleshooting
Test 2. TESTING THE MOTOR
TEST 2.1:
Check the motor field resistance from the motor F1 to
the motor F2 terminals.
If the resistance is within the values given in the
motor specification table, then skip ahead to test
#2.2. (The motor specification can be found in
Section 3 under "Motor Repair").
If the resistance is not within specification, then
repair or replace the motor.
Test continuity from F1 to the frame of the motor.
Any reading other than an open circuit indicates
a short in the motor.
Stop trouble shooting here and repair the problem.
When the repair is completed, completely retest the
vehicle before lowering the drive wheels to the ground.
TEST 2.2:
Check the resistance from the motor A1 to the A2
terminals.
If the resistance is less than 1 Ohm, then go to
test #2.3.
If the resistance is greater than 1 Ohm , then the
armature circuit is out of specification.
Stop trouble shooting here and repair the problem.
When the repair is completed, completely retest the
vehicle before lowering the drive wheels to the
ground.
1. Make sure the key-switch is in the "OFF" position, then remove
the key.
2. Place the forward-reverse switch in the center "OFF" position.
3. Set the park brake.
4. Place blocks under the front wheels to prevent vehicle movement.
Disconnect both of the battery leads during any maintenance or before
disconnecting any electrical component or wire. Failure to do so may
cause property damage and/or serious bodily injury.
Section 4 Page 8