12 41 551 Replacing carbon brushes

Lift springs and pull out carbon brushes.

Fig 1: Lifting Springs And Removing Carbon Brushes

Remove holder and pole housing.

Unsolder or cut off all carbon brushes.

When soldering in new carbon brushes, make sure that copper leads are not hardened with flowing solder.

Fig 2: Removing Holder And Pole Housing

Check commutator for wear, fine-grinding if necessary.

Diameter must be at least 33.5 mm.

Machine insulation between plates approx. 0.5 to 0.7 mm.

Fig 3: Checking Commutator Wear