5-4. MAIN PROPULSION ENGINE/MARINE GEAR - REMOVAL AND RUN-IN
MAINTENANCE INSTRUCTIONS. (Continued).
RUN IN (Cont)
Refer to Engine Test Report sample which estabilshes the sequence of
events for the test and run-in and to the Basic Run-In Horsepower Schedule 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
presents the engine operating characteristics. These characteristics will be a guide
for tracing faulty operation or lack of power.
Engine governors in most cases must be reset at the maximum full-load
speed designated 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.
After checking the engine performance at idle speed and being certain the
engine and dynamometer are operating properly, increase the engine speed to
half speed and apply the load indicated on the Basic Run-In Horsepower Schedule.
The engine should be run at this speed and load for 10 minutes to allow
sufficient time for the coolant temperature to reach the normal operating range.
Record length of time, speed, brake horsepower, coolant temperature and
lubricating oil pressure on the Engine Test Report.
Run the engine at each speed and rating for the length of time indicated in
the Basic Run-In Horsepower Schedule. This is the Basic Run-In. During this time
engine performance will improve as new parts begin to "seat in". Record all of the
Basic Run-In Inspection
While the engine is undergoing the Basic Run-In, check each item indicated
in Section "C" of the Engine Test Report. Check for fuel oil or water leaks in the
rocker arm compartment.
During the final portion of the Basic Run-In, the engine should be inspected
for fuel oil, lubricating oil and water leaks.