6-11. ENGINE RUNNING-IN.
This Task Covers:
Tools and Test Equipment Required
Tool Kit, General Mechanic's: Automotive (Appendix B, Section IlI, Item 1).
Tachometer, Mechanical (Appendix B, Section III, Item 27).
Writing Paper (Appendix E, Section II, Item 24).
Writing Pencil (Appendix E, Section II, Item 23).
LO 9-2350-264-12. Lubrication Order.
Run. (Refer to Figure 6-10).
To avoid excessive oil consumption, the running-in procedure must be performed
on repaired engines.
Install engine (1) in locally fabricated run-in fixture.
The level of engine oil usually falls slightly after initial circulation during engine
Run engine (1) for 2 minutes and check for oil and fuel leaks.
Stop engine (1) and check engine oil level (LO 9-2350-264-12).
Loosen jamnuts (2) on control rod (3).
State engine (1) and place tachometer to center of flywheel (4) long enough to obtain revolutions-per-minute
(RPM) reading. Record reading.
Engine speed should be 3000 rpm ± 150 rpm.
Screw in the adjusting nut (5) to increase the speed or out to decrease it. Adjust engine RPM to proper speed.
Tighten jamnuts (2).
Place tachometer to center of flywheel (4) and verify engine speed.
Allow engine (1) to run for 10 minutes
Stop engine and check engine oil level (LO 9-2350-264-12).