TM-9-2520-272-40 Direct Support for M113A3 X200-4A Transmission 2520-01-397-1074 Download
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TM 9-2520-272-40 0067 Roller, Ball, and Sleeve Bearings CAUTION Any bearing that has been subjected to metal contamination must be closely inspected for metal particles. Metal particles will cause bearing failure. 1. Refer to TM 9-214 for inspection procedures applying to roller and ball bearings. 2. Look at sleeve bearings and bushings for scoring, burrs, sharp edges, or scuff ng. Remove minor scoring, sharp edges, or scuff ng with crocus cloth. Remove burrs with whetstone. Plain Encased Seals, Step-Type Seal Rings, and Metal Seal Rings 1. Look at plain encased seals for cracks, cuts, or wear. If not like new in appearance, discard seals. 2. Look at composition of seal rings (step-type) for cuts, cracks, or wear. If not like new in appearance, discard seal rings. 3. Look at hook-type metal seal rings for cracks, bends, or broken hooks. If not like new in appearance, discard seal rings. Gears and Splined Parts 1. Look at gears for burrs, cracks, chipped or broken teeth, or pitting at tooth contact areas. Remove burrs with whetstone. Discard gears that are excessively pitted, cracked, or have chipped or broken teeth. 2. Look at splined parts for twisted or broken splines, burrs, or excessive wear. Remove burrs with whetstone. Discard parts that have twisted or broken splines or excessive wear. Shafts and Thrust Washers 1. Look at shafts for scoring, burrs, bends, blue discoloring, or clogged oil passages. Remove burrs and minor scoring with crocus cloth or whetstone. Clear oil passages with soft wire or compressed air. Discard shafts that are bent, cracked, or deeply scored. 2. Look at thrust washers for cracks, bends, scoring, discoloring, or burrs. Remove burrs with whetstone. Discard thrust washers that are cracked, bent, scored, or discolored. Friction Plates and Reaction Plates 1. Look at friction-faced, internal-splined friction plates for cracks, burrs, chipped or broken spline teeth, or severely pitted faces. Remove burrs with whetstone. If any one plate is cracked, severely pitted, or has chipped or broken spline teeth, DISCARD COMPLETE PACK OF CLUTCH PLATES. 2. Look at steel external-tanged reaction plates for cracks, breaks, burrs, galling, embedded metal, scoring, or chipped or broken tangs. Remove minor scoring and burrs with crocus cloth or whetstone. If any one plate is cracked, severely pitted or scored, or has chipped or broken tangs, DISCARD COMPLETE PACK OF CLUTCH PLATES. 3. Assemble clutch plates in the same order and facing the same way as when disassembled. Heat and pressure can cause steel reaction plates or plates to “cone,” or take on a slight conical shape. Fiber-coated friction plates may warp. 0067‐6