Quantcast MALFUNCTION 11: Generator oil pressure abnormal (650 ampere generator).

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TM 9-2815-220-24
ENGINE ABNORMAL OIL PRESSURE
0018 00
MALFUNCTION 10: (Continued)
Excessive crankcase blow-by (high crankcase pressure).
PROCEDURE
OBSERVATION
ANALYSIS
5 inch H2O (max.) pressure.
Start engine, warm up to
Crankcase pressure is normal.
operating temperature, and
perform "stall" test
(WP 0041, Engine Stall
Test). Go to WP 0016,
Engine Abnormal Exhaust.
Above 5 inch H2O pressure.
Crankcase pressure is high,
indicating excessive blow-by or
restricted crankcase vent at
turbocharger exhaust outlet pipe.
PROBABLE CAUSE
CORRECTIVE ACTION
a. (Continued) Rings worn or damaged.
(2) Clean engine crankcase breather tube
(WP 0078, Engine Oil Hose Assemblies,
Tube Assemblies and Related Parts
Replacement).
(3) Replace piston rings WP 0142, Pistons,
Rings, and Associated Parts Replace/Repair.
MALFUNCTION 11:
Generator oil pressure abnormal (650 ampere generator).
PROBABLE CAUSE
CORRECTIVE ACTION
a. Restricted oil lines.
(1) Inspect lines for plugging or damage
(WP 0091, Generator Oil Cooling System
Lines and Fittings Replacement).
b. Generator oil pump failure.
(1) Perform Oil Pressure Test as follows:
PROCEDURE
OBSERVATION
ANALYSIS
Remove 1/8-inch pipe plug in center
of generator end plate and install 200
psi gauge.
Oil pressure 100 10 psi.
Generator oil pump
Start and warm up engine at idle
operation is normal, the
speed (675-725 rpm) to operating
temperature (140 F).
generator is rotating
and the drive coupling
is functioning.
Generator oil pump
Oil pressure same as normal
failed, and/or generator
engine gallery pressure
not rotating, and/or
(15-25 psi).
drive coupling failed.
WP 0018 00-5

 


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