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 TM 55-1905-220-14-10
5-4. MAIN PROPULSION ENGINE/MARINE GEAR - REMOVAL AND RUN-IN
MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
RUN IN (Cont)
5
The lubricating oil temperature reading must be taken while the engine is operating at
full load and after it has been operating long enough for the temperature to stabilize.
This temperature should be recorded and should be within the specified range.
6
The lubricating oil pressure should be 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" 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" 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.
5-32
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