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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)
3. After the engine starts, if using a water
brake-type dynamometer, allow sufficient
water, by means of the control loading valves,
into the dynamometer absorption unit to show
a reading of approximately 5 lb. ft. on the
torque gage (or 10-15 HP on a horsepower
gage). This is necessary, on some units, to
lubricate the absorption unit seals and to
protect them from damage.
4. Set the engine throttle at idle speed, check
the lubricating oil pressure and check all
connections to be sure there are no leaks.
5. Refer to the Engine Test Report sample (see
page 5-926) which establishes the sequence
of events for the test and run-in, and to the
Basic Run-In Horsepower Schedule on page 5-919
which indicates the speed (rpm), length of
time and the brake horsepower required for
each phase of the test. Also, refer to the
Operating Conditions in Chapter 3 which pre-
sents the engine operating characteristics.
These characteristics will be a guide for
tracing faulty operation or lack of power.
6. Engine governors in most cases must be reset
at the maximum full-load speed designed for
the run-in. If a governor is encountered
which cannot be adjusted to this speed, a
stock governor should be installed for the
run-in.
7. After checking the engine performance at idle
speed and being certain the engine and dyna-
mometer are operating properly, increase the
engine speed to half speed and apply the load
indicated on the Basic Run-In Horsepower
Schedule on page 5-919.
5-923
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