TM-5-4210-249-13-P-2

TACTICAL FIRE FIGHTING TRUCK (TFF) MODEL M1142

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL WITH REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT REPAIR PARTS AND SPECIAL TOOLS); PART 2 OF 4

TM-5-4210-249-13-P-2 - Page 902 of 1452

TM 5-4210-249-13&P-2

0196-2

DRAFT

0196

VALVE CLEARANCE ADJUSTMENT

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Engine components become hot during normal operation.

Allow engine to cool

completely prior to performing this task.

Failure to comply could result in serious

injury to personnel.

NOTE

•

Adjust valve clearance with engine cold or allow engine to cool for at least one half hour to

lower engine oil temperature to 176ºF (80ºC) or less.

•

Increase valve clearance by 0.0039 in. (0.1 mm) at every cylinder head gasket renewal.

•

Adjust standard valve clearance after engine completes 100 hours of operation.

•

Valve overlap occurs when exhaust valve is about to close and intake valve is about to

open.

Pushrods cannot be turned in this position.

1.

Remove screw (1) and timing gear cover (2) from engine, and attach turning gear tool (3) to timing gear (4).

TFFT01268

WARNING

ICON 13