Drive Assembly
Replace drive when damaged or teeth are worn. When drive assembly consists of pinion and clutch, 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, then 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, using a screwdriver. Remove pinion with clutch discs, taking care not to lose disc. Remove stamping marks between stop ring and spring ring, push stop ring back and carefully lift out spring ring. Slacken clutch nut from pinion by twisting, being very careful of small springs inside nut. If pinion, stop disc or plate is damaged, force out ring so new parts may be installed.
Self-lubricating bushings should be replaced only when worn or damaged. Force out bushings, using a suitable mandrel, remove burrs and clean hole. Before pressing in new
bushing, soak bushing in a suitable oil for not less than 30 minutes. After replacing, cross check inner diameter of bushing by pulling a smoothing mandrel through.