English 5.906-269.0 Rev. 00 (03/11) 101If the motor runs poorly or insufficiently, the carbonbrushes could be worn.1 Closing head2 Carbon brush3 Drive motor Unscrew the locking cover. Remove the carbon brushes. Clean/replace the carbon brushes. Screw in the locking cover.9.10 Travel drive (W Bp Pack only)9.10.1Replacing the carbon brushes in the drive motor