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) Perform steps 1 through q only if input shaft (27) and/or  upper  cover  (14)  have  been  replaced. 1. spool (30) Measure While pulling input shaft (27) downward, protrusion measure relationship of spool end to end of  housing  using  feeler  gage.  (Measure from end nearest outside diameter of spool to end nearest inside diameter of body.) If spool end is within 0.0025 inch of being flush, proceed to step 34. If not within 0.0025 inch of being flush, proceed to step m. m. Drive link (10) Remove n. Housing (43) Reposition Clamp O-ring fitting in vise so that input and clamp shaft (27) faces upward o. Four cap screws (13) Loosen  and remove p. Upper cover ( 14) with Remove O-ring  (15) q. Shims (17) Add  or Add  or  remove  shims  to  satisfy  require- remove ment of step 1, and repeat steps e through i until spool is flush with end of housing within 0.0025 inch 34 End cover (3) a. Two 5/16-18UNC Install In two of seven threaded holes at end of and housing (43) by 3-3/4 inch guide housing  (43) studs b. Spacer (12) Position  and Position plain side of spacer away from install housing (43), and lower spacer over guide studs  and  onto  housing NOTE One of the seven holes in the stator of the rotor set (11) is smaller than the other six holes. In the following step, position this smal- ler hole over one of the guide studs. c. Rotor set (11) Install Lower over guide studs and onto spacer (12 d. Manifold (9) Position  and Position circular slot side of manifold away install from housing (43) and lower manifold over guide studs and onto rotor set (11) 3-175