TM  10-3930-638-24&P 3-24. STEERING SYSTEM MAINTENANCE (cont) b. Steering Gear (cont). 33 STEP LOCATION ITEM ACTION REMARKS REASSEMBLY   (cont) NOTE (cont) Use original shims (17) unless cracked or damaged. Replace a defective shim with a new shim of equal thickness. d.  Shims  (17) Install Place on tip of thrust washer (22) e.  New  O-ring(15) Lubricate Coat with clean grease and insert in and install counterbore of upper cover NOTE If original upper cover (14) is used, align match marks on upper cover and housing (43). If a new upper cover is used, disregard match mark on housing. f. Upper cover (14) Position Over input shaft (27) and onto housing (43 g. Four cap screws (13) Install  and Tighten  hand-tight  only tighten h. Upper cover (14) Align Position worm type hose clamp around and housing (43) flange of upper cover (14) and outside diameter pilot of housing (43). Tighten clamp to achieve upper cover and housing alignment i. Four cap screws (13) Tighten Alternately tighten to 18-22 pounds foot torque CAUTION To prevent distortion of steering gear, do not clamp vise jaws di- rectly  on  steering  gear  housing  (43). j. Housing (43) Reposition Clamp O-ring fitting in vise so that input and clamp shaft (27) faces downward k. Drive link (10) Install Pull  input  shaft  (27)  downward  and  prevent rotation,  engage  splines  on  drive  link  (10) in spool (30), and rotate drive link to position spool end flush with end of hous- ing (43). Remove drive link, reposition to allow drive link slot to engage pin on torsion bar, and insert drive link 3-174