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 TM 55-1905-221-14-3
6-22.
POWER UNIT - MULTIPLE ENGINE REMOVAL - AND RUN-IN INSTRUCTIONS
(Continued).
LOCATION/ITEM
ACTION
REMARKS
OVERHAUL (Cont)
(e) Final Run-In.
After all tests have been made and the Engine Test Report form completed through Section "D", the engine is
ready for final test. This portion of the test and run-in procedure will assure the engine owner that his engine has been
rebuilt to deliver factory rated performance at the same maximum speed and load which will be experienced in the
installation.
If the engine has been shut-down for one hour or longer, it will be necessary to have a warm-up period of 15
minutes at the same speed and load used for warm-up in the Basic Run-In. If piston rings, cylinder liners or bearings
have been replaced as a result of findings in the Basic Run-in, the entire Basic Run-In should be repeated as though the
run-in and test procedure were started anew.
All readings observed during the Final Run-In should fall within the range specified in the table under Operating
Conditions and should be taken at full load unless otherwise specified. Following is a brief discussion of each condition
to be observed.
Water temperature of the engine should be taken during the last portion of the Basic Run-In at full load. It should
be recorded and should be within the specified range.
Lubricating oil temperature reading must be taken while engine is operating at full load and after engine has been
operating long enough for the temperature to stabilize. This temperature should be recorded and should be within the
specified range.
Lubricating oil pressure should be recorded in pounds per square inch after being taken at engine speeds
indicated in Operating Conditions.
6-284
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