TM 5-3895-376-14&P
Section II. MAINTENANCE PROCEDURES
6-3. ENGINE ASSEMBLY MAINTENANCE INSTRUCTIONS
This task includes.
a. Run-ln Test.
INITIAL SETUP
Equipment Condition
Tools
Engine removed.
Tool Kit, General Mechanic's
Stand, Engine: Item 45, Appx F
General Safety Instructions
Materials/Parts
Observe all WARNINGS and CAUTIONS
Oil, Lubricating; item 6, Appx E
Fuel Oil, Diesel, item 3, Appx E
Element, Air Cleaner (1)
7.
During test run observe and check the following:
RUN-IN TEST
Check for proper function.
a.
1.
An engine that has been repaired to include ma-
jor component replacement, including; piston as-
Check for unusual noise.
b.
sembly, cylinder, connecting rod, crankshaft,
governor, fuel pump, crankcase (engine hous-
c.
Check for leakages.
ing), and gear cover, a run-in test is necessary to
determine engine performance.
d.
Check rpm output at idle speed, normal
speeds should be 900 - 1100 rpm.
2.
Mount engine in an engine stand, in accordance
with instructions of tester.
e.
Check rpm output at full load speed, normal
full load speed is 2850 rpm.
Service the engine with normal lubricating oil
3.
f.
Check exhaust gas temperature, maximum
exhaust temperature is 1000F (550C).
4.
Service the pre-cleaner (Para. 3-6).
Check lubrication oil temperature, maximum
g.
Service the fuel tank (Para. 3-7).
5.
oil temperature is 250F (120C).
6.
Operate the engine on the engine stand per the
h.
Check lubrication oil pressure and record.
following schedule:
Maximum oil pressure is 58 psi (4.0 bar) at
220F (100C).
a.
Engine at idle speed, no load for 10 minutes.
i.
Minimum oil pressure is 26 psi (1.8 bar) at
b.
Engine at half speed, half load for 10 minutes.
220F (100C).
c.
Engine at full speed, full load for 20 minutes.
8.
Service the engine oil (Para. 4-12).
d.
Engine at idle speed for 2 minutes.
6-2
