Checking The Starter Motor

Checking The Starter Motor

Fault-tracing information

Condition





If the carbon brushes, brush springs, commutator or windings for the starter motor are defective, the starter motor will not be able to deliver full power.

Possible source
- Worn carbon brushes or too low pressure in the brush springs
- Large resistance because of a dirty commutator
- Short-circuit in the windings
- Defective bearing which makes the rotor drag against the pole pieces.

Fault symptom[s]
- Low rotation speed in the starter motor.