12 41 513 Disassembling and assembling starter motor

Removing magnet switch, refer to 12 41 041 REPLACING SOLENOID SWITCH 

Unscrew and remove dust cap (2).

Remove retainer (3), shim (4) and sealing ring (5).

Installation: 

1. Checking end float of armature, refer to OVERHAUL .

If necessary, correct with shims.

Unscrew housing screws and remove cover.

Installation: 

1. Recesses for housing screws and insulating section must fit with one another.

Check bearing bush and oil before installation.

Lift spring and remove carbon brushes.

Remove retaining plate.

Installation: 

1. Check carbon brushes and collector for wear and repair if necessary,

refer to 12 41 551 REPLACING CARBON BRUSHES 

Remove terminal housing.

Unfasten screw for engagement lever and remove rubber seal.

Lift out armature with drive pinion and selector fork.

Installation: 

1. Grease guide for selector fork.

Check bearing bush on input bearing plate and oil prior to installation.

Press back thrust ring (1) with suitable tube section.

Press retaining rings (2) apart and pull off shaft.

Remove burr with file and remove drive pinion (3).

Installation: 

1. Use new retaining ring (2).

Grease race for drive pinion.

Installation: 

1. Check pinion for signs of wear (wear on gears/splines, bearings, freewheels) and replace if necessary.

Check bush in intermediate bearing and replace if necessary.