Pinion Clearance Check

Pinion Clearance Check:

Measuring Pinion Clearance:

The pinion clearance should be checked after reassembly of the motor. It cannot be adjusted. Improper clearance is an indication of worn parts.
To check pinion clearance, perform the following steps.
1. Disconnect the motor field connector from the solenoid "M" terminal and Insulate It carefully.
2. Connect a battery of the same voltage as the solenoid from the solenoid switch terminal to the solenoid frame.

Pinion Clearance Check:

3. Momentarily flash a jumper lead from the solenoid motor terminal to the solenoid frame. This will shift the pinion into cranking position and it will remain so until the battery is disconnected.
4. Push the pinion back toward the commutator end to eliminate stack movement.

Measuring Pinion Clearance:

5. Measure the distance between pinion and pinion stop collar.
- Clearance should be 0.25 mm to 4.06 mm (0.010 in to 0.160 in).