TM  10-3930-638-24&P 3-5. ENGINE MAINTENANCE (cont) a. Engine Tune-up (cont). (3) Fuel Injection Pump Adjustments (cont). STEP EDCATION ITEM ACTION REMARKS INJECTION  PUMP  —  TIMING  ADJUSTMENT  (cont) 1 (cont) NOTE If both timing marks are not visible in the following step, rotate engine one complete revolution and rpeat step a above. c.  Injection  pump  timing Check If  timing  marks  are  aligned  as  shown, marks proceed to step h. If marks are not aligned, proceed to step d d. Three pump mounting Loosen nuts 3-33