SAMPLE BALLAST RESISTOR DIAGRAM
The procedure for adjusting the starting acceleration of a crane or tractor, with ballast resistance control, consists of three
Pick up the heaviest load that is to be handled.
Move clamps A, B, & C toward 9, 12, and 15 until the crane or tractor stalls. (This coil adjustment increases
resistance and decreases the starting acceleration).
Move clamps A, B, & C away from 9, 12, and 15 until the crane or tractor begins to slowly accelerate to the
proper speed. (This coil adjustment decreases resistance and increases the starting acceleration).
Once a ballast resistor has been adjusted, it should never need attention except for four (4) possibilities:
Difference starting acceleration characteristics are desired.
The motor was replaced by one with different characteristics from the first motor.
Physical damage to the resistors.
The resistor coil has burned out.
For wound rotor motor, contact the factory office for resistor adjustments.