ENGINE WILL NOT CRANK - continued - TM-10-3930-673-340035

TM 10-3930-673-34

WARNING

When engine is removed, be sure engine is securely attached to engine stand. If engine falls from the stand, serious bodily injury

could occur, and the block and crankshaft could be damaged.

Use care when removing snap and retaining rings. Snap and retaining rings are under spring tension and can act as projectiles

when released, and could cause severe eye injury.

Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and personal protective

equipment (goggles/shield, gloves, and so forth).

Keep clear of test spray from injection nozzle. Fluid at test pressures can penetrate skin, causing infection and possible death.

CAUTION

If crankshaft is turned in the wrong direction, the tab on the upper bearing half will be pushed between the crankshaft and main

bearing bore in the block. This could cause damage to the block and crankshaft.

Be careful not to scratch or damage crankshaft when removing connecting rod caps and upper half of bearings. Any damage to

the crankshaft could result in premature engine failure.

FUEL INJECTOR

MANUAL TEST

(1) Disconnect fuel supply lines from

injectors and remove fuel injection

(2) Attempt to rotate crankshaft manually

(a) If crankshaft can be rotated

manually, go to Step 2 of this fault.

(b) If crankshaft cannot be rotated

manually, remove engine from

vehicle (Para 3-3), and inspect

bearings for bearing seizure

(Para 3-9) and/or pistons for piston

seizure (Para 3-16). Replace

components as necessary.

FUEL

INJECTION

PUMP

CRANKSHAFT

2-9