TM  10-3930-638-24&P 3-5. ENGINE MAINTENANCE (cont) a.  Engine  Tune-up  (cont). (3) Fuel Injection Pump Adjustments (cont). STEP LOCATION ITEM ACTION REMARKS INJECTION  PUMP  —  TIMING  ADJUSTMENT  (cont) 1 (cont) NOTE Do not use calibration marks in the following step. Use marks in injection pump timing window only. e. Injection pump Rotate Until timing marks in timing window are in line NOTE To advance timing, rotate top of pump away from engine. To retard timing, rotate top of pump toward engine. f. Three pump mounting Tighten Torque to 35-42 pounds foot torque nuts g. Injection pump timing Recheck Repeat steps a and c above until timing marks are in line h.  Timing  window  cover Position On injection pump and new gasket i.  Cover  screws Install  and Until timing window cover is securely tighten mounted ENGINE IDLE SPEED ADJUSTMENT 2 Fuel injection a.  Engine Warm-up Start engine and operate until normal pump operating temperature is reached b.  Tachometer Position With engine idling, press conical tip against tachometer drive shaft on engine until  tachometer  hand  stops  moving, then note reading 3-34