TM  10-3930-643-34 ELECTRICAL  SYSTEM  MAINTENANCE.  (cont) 5-1. Starting Motor. (Sheet 7 of 15) CLEANING/INSPECTION 40. Wipe bellows (8). insulator (68), four brushes (31), drive (47) and two plates (66) with a clean, lint-free cloth. Do not use cleaning solvent. 41. Clean coil (63) and starting motor housing  (70)  with  mineral  spirits  and brush. Dry with clean cloth. Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and personal protective equipment  (goggles/shield,  gloves, etc.). 42. Clean armature (46) with mineral spirits and brush. Dry with compressed air. Commutator can be cleaned with No. 00 grit sandpaper. Wipe commutator with  a  clean, lint-free cloth to remove all particles from between commutator bars. Do not use emery cloth. Go to sheet 8 5-8