TM 5-3895-346-14
RUN-IN INSTRUCTIONS
ENGINE OVERHAUL
a. Oil pressure gage installed in one of the engine main oil galleries.
b. Oil temperature gage installed in the oil pan, or thermometer installed in the dipstick hole in the oil pan.
c. Adapter for connecting a pressure gage or mercury manometer to the engine air box.
d. Water temperature gage installed in the thermostat housing.
e. Adapter for connecting a pressure gage or water manometer to the crankcase.
f. Adapter for connecting a pressure gage or mercury manometer to the exhaust manifold at the flange.
g. Adapter for connecting a vacuum gage or water manometer to the blower inlet.
h. Adapter for connecting a fuel- pressure gage to the fuel manifold-inlet passage.
i. Adapter for connecting a pressure gage or mercury manometer to the turbo-charger.
In some cases, gages reading in pounds per square inch or kilopascals are used for determining pressures
while standard characteristics are given in inches of mercury or inches of water. It is extremely important that
the scale of such a gage be of low range and finely divided if accuracy is desired. This is especially true of a
gage reading in psi or kPa, the reading of which is to be converted to inches of water. The following conversion
factors may be helpful.
Inches of water
=
psi x 27.7 inches
Inches of mercury
=
psi x 2.04 inches
Inches of water
=
kPa x 4.02 inches
Inches of mercury
=
kPa x 0.30 inches
CAUTION
Before starting the run-in or starting the engine for any reason following an overhaul, it is of extreme
importance to observe the instructions on Preparation to Start Engine First Time in Chapter II Operations.
Run-In Procedure
The procedure outlined below will follow the order of the sample Engine Test Report.
A. PRESTARTING
1. Fill the lubrication system as outlined under Lubrication System -- Preparation to Start Engine First Time in
Chapter II Operations.
2. Prime the fuel system as outlined under Fuel System -- Preparation to Start Engine First Time in Chapter
II Operations.
3. A preliminary valve clearance adjustment must be made before the engine is started. Refer to Exhaust
Valve Clearance Adjustment.
4. A preliminary injector timing check must be made before starting the engine. Refer to Fuel Injector
Timing.
5. Preliminary governor adjustments must be made. Refer to Governor and Injector Rack Control
Adjustment.
6. Preliminary injector rack adjustment must be made. Refer to Governor and Injector Rack Control
Adjustment.
B. BASIC ENGINE RUN-IN
The operator should be observant at all times, so that any malfunction which may develop will be detected.
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