TM   10-3930-638-24&P 3-24. STEERING SYSTEM MAINTENANCE (cont) b. Steering Gear (cont). STEP LOCATION ITEM ACTION REMARKS REASSEMBLY  (cont) NOTE (cont) Perform the following step only if retainer spring (33) has been 32 removed. c. New retainer Install spring  (33) d. Spring washer (25) Position e. Actuator ball (32) Position f. Input shaft (27) Install  in spool (30) g. Torsion bar (28) Position h. Input shaft (27) with  spool  (30) i. Drive ring (31) Carefully insert into groove on spool to avoid  scratching  or  nicking  spool Over  thrust  washer  (24)  and  bearing  (23) In ball seat located inside spool (30) Hold  input  shaft  and  spool  in  a  horizontal position. Insert input shaft into spool, engaging the helix and actuator ball with a counter-clockwise motion Use mid-section of torsion bar as a gage, and  insert  torsion  bar  between  spool  end and thrust washer (24) as shown Position Keeping  torsion  bar  between  spool  end  and vertically thrust washer, place shaft and spool in a vertical position, with shaft end on a table surface Position  and Position drive ring in end of spool. Visual- install ly align an internal space on drive ring wit a tooth on input shaft spline, and allow drive ring to drop to limit of its travel. Rotate  input  shaft  slightly  to  allow  drive ring to fully engage 3-172