ENGINE TIMING (Cont) - TM-55-1905-220-14-50536

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ENGINE TIMING (Cont)

TM-55-1905-220-14-5 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

ENGINE TIMING (Cont)

TM 55-1905-220-14-5

3-91.2. ENGINE TIMING (Cont).

(12)

Rotate the crankshaft opposite the direction of

rotation slowly until the hand on the dial indicator just

stops moving.

(13) Rotate the crankshaft opposite the direction of rotation until the indicator hand just starts to move.

Reset the dial to "O". Continue turning the crankshaft slowly until indicator reading is .010" - then

stop turning.

(14) Scribe a second line on the vibration damper in the same manner as in step 11.

(15) Scribe a third line halfway between the first two lines. This is positive top-dead-center. The three

scribed lines are shown on the crankshaft pulley. Remove the indicator from the engine.

NOTE

Make certain that the crankshaft pulley retaining bolt is not loosened while turning the crankshaft. The

bolt must be tightened to 290-310 lb-ft (431.5-461.3 kg/m) torque if it becomes loose.

(16)

Install the injector assembly. Swing the injector and

valve rocker arms back into position and install

the rocker arm brackets and tighten the bolts to the

specified torque. Adjust the valve clearance and

time the injector. Rotate the crankshaft until the

exhaust valves in the selected cylinder are open.

(17) Install the dial indicator again so the spindle of the indicator rests on top of the injector follower as

illustrated. Set the indicator dial to "0". Rotate the crankshaft slowly in the direction of rotation, and

stop when the TDC mark on the vibration damper or crankshaft pulley lines up with the pointer.

3-1551