Technical
Service
Inspection
Monthly
Weekly
GENERAL-Continued
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See that deficiencies noticed are corrected or
reported to the proper authority.
Modifications. See if all available modifioa-
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tion work orders applying to this machine
have been completed and recorded on DA
Form 478 (MWO and Major Unit Assembly
Replacement Record-Organizational Equip-
ment File).
ENGINE AND ACCESSORIES
Cylinder Heads, Manifolds, and Gaskets. In-
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spect the cylinder heads, manifolds, and ex-
haust pipe for leaks, loose mounting bolts
and nuts, and defective gaskets.
.......
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Tighten any loose manifold and exhaust pipe
mounting bolts and nuts. Replace any de-
fective gasket. On new or reconditioned
engines, check all cylinder-head bolts for
tightness at the first weekly service. The
correct torque-wrench pull is 90 foot-pounds.
Valve Mechanism. Check the valve adjustment
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if excessive valve noise or loss of power is
noticed. The approximate valve-rocker arm
clearance with the engine cold is 0.014 inch
for both valves.
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Adjust the valve-rocker arm clearance if neces-
sary. Be sure the valve-cover gasket is in
good condition and that the cover fits se-
curely.
Compression Test. Test the compression of all
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cylinders and record the readings on DA
Form 464. Normal compression pressure at
cranking speed is 75 to 80 psi open throttle.
Crankcase, Breather. Inspect the crankcase for
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leaks. Check the condition of crankcase
breather and cap.
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Correct or report any oil leaks noticed. Change
the oil and clean the breather if necessary.
Refer to the current lubrication order.
Oil Filters. Inspect the oil filter assembly con-
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nections for leaks while the engine is running.
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