TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 135 of 1563
TM 9-2815-220-24
ENGINE ABNORMAL OIL PRESSURE
0018 00
MALFUNCTION 7:
High oil level (overfull).
PROBABLE CAUSE
CORRECTIVE ACTION
a. Overfilled in error.
(1) Drain to proper level.
b. Oil diluted with fuel.
(1) Refer to Malfunction 8 in this work
package.
MALFUNCTION 8:
Oil diluted with fuel (evidenced by rising oil level, thin oil consistency).
PROBABLE CAUSE
CORRECTIVE ACTION
(1) Drain oil and refill with proper oil (refer to
lubrication order).
a. Engine operating at idle for extended
periods during cold weather.
(2) Avoid operating at idle for extended periods
during cold weather.
b. Fuel leakage at fuel injector nozzle body.
(1) Locate faulty nozzle as follows.
PROCEDURE
OBSERVATION
ANALYSIS
Look for any signs of fuel leakage at
nozzle.
Leakage indicates
nozzle is defective.
Operate engine at idle
speed.
Note any movement (jumping) of nozzle
in cylinder head (visually or by touch).
Movement indicates
loose nozzle cap nut in
body or collapsed
nozzle holder spring.
Nozzle is defective.
PROBABLE CAUSE
CORRECTIVE ACTION
b. (Continued)
Fuel leakage at fuel injector
nozzle body.
(2) Repair or replace nozzle assembly
(WP 0114, Fuel Injector Nozzle
Replace/Repair).
c. Engine fuel supply pump shaft seal leak.
(1) Repair or replace pump assembly
(WP 0047, Fuel Pump Replacement (2CA
& 2DA), use (WP 0048 for 2DR).
d. Fuel injection pump internal fuel leak into
oil.
(1) Replace fuel injection pump (WP 0115,
Fuel Injection Pump Assembly
Replacement).
MALFUNCTION 9:
Excessive oil consumption (150:1 fuel-to-oil ratio maximum).
PROBABLE CAUSE
CORRECTIVE ACTION
a. Loss of oil due to leaks.
(1) Inspect engine for oil leaks.
Repair as
required.
b. Oil level overfull.
(1) Refer to WP 0031, Engine Oil Replacement.
WP 0018 00-3
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