Drive Assembly
Replace drive when damaged or teeth are worn. Disassemble as follows: Pull Pinion with left hand (turning to left), then pull guide discs toward commutator, also giving these a left hand turn. Mark all parts for reassembly. Remove intermediate bearing, spring, spring seat and plate from armature shaft. Carefully remove spring ring using a screwdriver and pushing stop ring back.
Take off inner and outer spring, guiding piece, locking piece, disc and thrust ring from drive cup. Remove spring ring from drive cup. Remove pinion with clutch discs, taking care not to lose disc. Remove stamping marks between stop ring and spring ring. Slacken clutch nut from pinion by twisting, being careful of small springs inside nut. If pinion, stop disc or plate is damaged, force out ring so new parts may be installed.