TM 10-3930-659-34 4-19.  ENGINE OIL PUMP REPLACEMENT (Con’t). 10. Using inside caliper micrometer, measure inside diameter  of  drive  shaft  spur  gear  bore  (16)  of cover  (8).    Maximum  allowable  measurement  is 0.636 in.  (16.154 mm). C.  INSTALLATION 1. Install adapter (11) in engine oil pump (2). 2. Install sleeve (10), nut (9), and outlet tube (1) on engine oil pump (2). 3. Install cover (8) on engine oil pump (2). 4-79