Carbon brushes
 
Removal
- Remove combustion air blower and take motor out of motor support housing. 
- Remove cover from motor housing. 
- Unsolder carbon brush from terminal tab. Bend up tongue on brush holder and take out spring and brush. 
Note
Dirty laminations should be cleaned with a clean cloth moistened with gasoline. If the commutator is burnt, replace the complete pole housing and armature.
Installation
- Insert carbon brushes into brush holder, route contact pigtail through slot in brush holder to terminal tab and solder. Insert spring and bend tongue over. 
- Assemble motor, insert into motor support housing and reinstall combustion air blower.