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 150 of 1563

TM 9-2815-220-24
FUEL SYSTEM ABNORMAL CONDITIONS
0020 00
MALFUNCTION 6:
(Continued)
Fuel injection pump deficiencies.
PROBABLE CAUSE
CORRECTIVE ACTION
g. (Continued)
Fuel control stuck in "no-fuel"
position (result of improper preservative oil
during long term storage).
(6) If engine fails to start, replace fuel injection
pump (WP 0115, Fuel Injection Pump
Assembly Replacement).
h. Fuel injection pump drive coupling failure
(pump not rotating).
(1) Check fuel injection pump rotation as
follows:
PROCEDURE
OBSERVATION
ANALYSIS
Remove top deck, engine rear
cooling fan vane and rear fan.
Fuel injection pump shaft is
rotating.
Drive coupling is
satisfactory.
Crank engine.
Fuel injection pump shaft
and/or coupling do not rotate.
Fuel injection pump
coupling failed or is loose
on pump shaft.
PROBABLE CAUSE
CORRECTIVE ACTION
h. (Continued)
Fuel injection pump, drive
coupling failure (pump not rotating).
(2) Replace fuel injection pump drive coupling
(WP 0116, Coupling, Fuel Injection Pump
Replace/Repair.
i.
Fuel injection pump timing improper.
(1) Check timing (WP 0036, Injection Pump
Timing).
j.
Fuel injection pump internal failure.
(1) Replace fuel injection pump (WP 0115,
Fuel Injection Pump Assembly
Replacement).
MALFUNCTION 7:
Engine fuel supply pump defective.
PROBABLE CAUSE
CORRECTIVE ACTION
a. Fuel pump failure (insufficient fuel output
due to defective regulating valve, internal
pump wear or shaft seal leak causing fuel
leakage into engine oil).
(1) Check fuel pressure as follows:
WP 0020 00-8


Back to Top