POWER UNIT - MULTIPLE ENGINE REMOVAL - AND RUN-IN INSTRUCTIONS
2 Engine governors in most cases must be set 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 period of
After checking the engine performance at idle and being certain the engine and dynamometer are operating
properly, increase the engine speed to 1200 rpm and apply the load indicated on the Basic Run-In Horsepower Schedule.
The engine should be run at this speed and load for 15 minutes to allow sufficient time for coolant temperature to reach
the normal operating range. Record length of time, speed, horsepower, coolant temperature and lubricating oil pressure
on the Engine Test Report.
Run 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 phase, engine performance will improve as new parts begin to "seat-in". Record all
the required data.
(c) 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.
Upon completion of the Basic Run-In and Inspection, the load should be removed from the dynamometer and the
engine speed gradually reduced to idle and the engine finally stopped.
(d) Inspection After Basic Run-In.
The primary purpose of this inspection is to provide a fine engine tune-up. First, the cylinder head and rocker
arm shaft bolts should be tightened to the proper torque. Next, the applicable tune-up procedure should be completed.