TM    10-3930-638-24&P 3-24. STEERING SYSTEM MAINTENANCE (cont) b.  Steering  Gear  (cont). Torsion bar (28) and Inspect pin Thrust washers (22 and 24), thrust bearing  (23),  and wear  washer  (6) Input shaft (27) Inspect STEP LOCATION ITEM ACTION REMARKS INSPECTION  (cont) 12 Spring (42) Inspect Install in spring tester. Check that force to compress spring to 0.830 inch is 12.5 to 14.5 pounds. Replace spring if force is not 12.5 to 14.5 pounds 13 Use micrometer to measure diameter of pin on both sides, Diameter must not vary more than 0.001 inch. Replace torsion bar if scored, bent or worn, or if pin diameter varies more than 0.001 inch 14 Replace if pitted, scored or excessively worn 15 Inspect Replace if cracked or bent, if seal area is pitted, corroded or worn, or if helical groove is chipped or pitted NOTE Light polishing of shaft due to seal contact is normal and is not cause  for  shaft  replacement. 16 Needle roller (26) Inspect Replace  if  cracked  or  damaged 17 Balls (32, 36, 39 Inspect Replace if pitted, scored, out-of-round or and 40) damaged 18 Retaining rings (18 Inspect Replace if cracked or broken and 21) and spring (33) 19 Screws (2 and 13) and Inspect Replace  if  worn,  or  if  threads  damaged plugs (34 and 37) 20 Drive link (10) Inspect Replace if cracked, or if teeth chipped, broken or excessively worn 3-168