TM  10-3930-638-24&P 3-24. STEERING SYSTEM MAINTENANCE (cont) b. Steering Gear (cont). STEP LOCATION ITEM ACTION REMARKS REASSEMBLY  (cont) 34 (cont) 35 Upper  cover CAUTION Tighten seven hex bolts (2) according to steps m and n only. Do not  over  tighten  bolts  to  avoid  damage  to  steering  gear. m. Seven hex bolts (2) Tighten (initial) n. Seven hex bolts (2) Tighten (final) a. Housing (43) Reposition (14) and input and  clamp shaft (27) NOTE Using 5/16 inch 12 point socket, tighten in sequence shown to initial torque of 2-3  pounds  foot Using  same  sequence,  tighten  to  15-19 pounds  foot  torque Clamp O-ring fitting in vise so that input shaft (27) faces upward Cover end of input shaft (27) with cellophane tape to protect new seal (20) from sharp edges of shaft. b. New seal (20) Lubricate  and Coat seal with grease and install over input install shaft lip side first c. New back-up Install Position small end toward input shaft; then washer (19) slide onto shaft and against seal (20) d. Seal (20) and back-up Position Using a 7/8 inch deep well socket, gently washer (19) push back-up washer and seal down into upper cover (14) e. Retaining ring (18) Install Position  rounded  edge  of  retaining  ring toward upper cover. Slide retaining ring over input shaft, and install in groove in upper cover using snap ring pliers 3-177