Excavator Throttle Motor AC2000 Maintenance Method
1.Throttle Motor Failure Phenomenon
Test the resistance change of the throttle motor at different positions and use 24V to start the motor. However, when the motor is started with the same direction of driving voltage, the motor throttle flexible shaft extends to a certain length and then automatically retracts.
It is suspected that the hoist limit clip inside the motor is broken (similar to the bolt stripping), causing the flexible shaft to move in the opposite direction. In order to study the root cause of this motor failure, the motor was disassembled.