Section II. MAINTENANCE PROCEDURES
6-3. ENGINE ASSEMBLY MAINTENANCE INSTRUCTIONS
This task includes.
a. Run-ln Test.
Tool Kit, General Mechanics
Stand, Engine: Item 45, Appx F
Oil, Lubricating; item 6, Appx E
Fuel Oil, Diesel, item 3, Appx E
Element, Air Cleaner (1)
General Safety Instructions
Observe all WARNINGS and CAUTIONS
An engine that has been repaired to include ma-
jor component replacement, including; piston as-
sembly, cylinder, connecting rod, crankshaft,
governor, fuel pump, crankcase (engine hous-
ing), and gear cover, a run-in test is necessary to
determine engine performance.
Mount engine in an engine stand, in accordance
with instructions of tester.
Service the engine with normal lubricating oil
Service the pre-cleaner (Para. 3-6).
Service the fuel tank (Para. 3-7).
Operate the engine on the engine stand per the
Engine at idle speed, no load for 10 minutes.
Engine at half speed, half load for 10 minutes.
Engine at full speed, full load for 20 minutes.
Engine at idle speed for 2 minutes.
During test run observe and check the following:
Check for proper function.
Check for unusual noise.
Check for leakages.
Check rpm output at idle speed, normal
speeds should be 900 - 1100 rpm.
Check rpm output at full load speed, normal
full load speed is 2850 rpm.
Check exhaust gas temperature, maximum
exhaust temperature is 1000°F (550°C).
Check lubrication oil temperature, maximum
oil temperature is 250°F (120°C).
Check lubrication oil pressure and record.
Maximum oil pressure is 58 psi (4.0 bar) at
Minimum oil pressure is 26 psi (1.8 bar) at
Service the engine oil (Para. 4-12).