Bosch GDS EC300 brushless motor Cordless Impact Wrench, nominal torque 300 Nm.
The motor makes a sound but does not turn.
When the machine was disassembled, traces of water intrusion were found, the interior was severely corroded, the aluminum shell was deeply corroded, and the motor stator and rotor bearings were rusted to death.
The internal condition of the gearbox is good, the circuit part is basically complete, and the speed control board is corroded and the wiring is broken.
In addition to speed regulation, the power after repair is strong, and the speed and torque are sufficient.