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 TM 55-1905-220-14-11
5-69.
ENGINE ASSEMBLY - REMOVAL AND RUN-IN - MAINTENANCE INSTRUCTIONS
(Continued).
LOCATION
ITEM
ACTION
REMARKS
ENGINE RUN-IN INSTRUCTIONS (Cont)
The lubricating oil pressure should be
6.
recorded in psi after being taken at engine
speeds indicated in the Operating Conditions,
Chapter 3.
7.
The fuel oil pressure at the fuel manifold
inlet passage should be recorded and should
fall within the specified range. Fuel
pressure should be recorded at maximum engine
rpm during the Final Run-In.
8.
Check the air box pressure while the engine
is operating at maximum speed and load. This
check may be made by attaching a suitable gage
(0-15 psi) or manometer (15-0-15) to an air
box drain or to a hand hole plate prepared for
this purpose. If an air box drain is used as
a source for this check, it must be clean.
The air box pressure should be recorded in
inches of mercury.
9.
Check the crankcase pressure while the engine
is operating at maximum run-in speed. Attach
a manometer, calibrated to read in inches of
water, to the oil level dipstick opening.
Normally, crankcase pressure should decrease
during the run-in indicating that new rings
are beginning to "seat-in".
10.
Check the air inlet restriction with a water
manometer connected to a fitting in the air
inlet ducting located 2 inches above the air
inlet housing. When practicability prevents
the insertion of a fitting at this point, the
manometer may be connected to a fitting
installed in the 1/4 inch pipe tapped hole in
the engine air inlet housing. If a hole is
not provided, a stock housing should be
drilled, tapped, and kept on hand for future
use.
5-928
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