TM  10-3930-638-24&P 3-5. ENGINE MAINTENANCE (cont) a. Engine Tune-up (cont). (1)  Locating  Top  Dead  Center  (cont). STEP LOCATION ITEM ACTION REMARKS 2 a. Engine flywheel Rotate  clockwise Engage flywheel ring gear teeth with blade cont) of screwdriver as shown. Rotate engine until pointer in timing hole is in line with the 10° BTDC mark on flywheel b. Rocker arm adjusting Turn counter- Use wrench to rotate adjusting screw screw for No. 1 clockwise inwards to take pressure off push rod cylinder intake valve c. Rocker arm for No. 1 Reposition Push rocker arm down against valve cylinder intake valve spring and push rearwards off valve and push  rod d. Push rod for No. 1 Remove Lift from cylinder head cylinder  intake  valve e. Two keepers for No. 1 Remove Compress  valve  spring  using  screwdriver cylinder  intake  valve as  shown,  remove  valve  keepers,  and slowly release screwdriver 3-25