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 153 of 1563

TM 9-2815-220-24
FUEL SYSTEM ABNORMAL CONDITIONS
0020 00
MALFUNCTION 8:
(Continued)
Fuel injector nozzle defective.
PROBABLE CAUSE
CORRECTIVE ACTION
(1) Bench test injector nozzle (WP 0114, Fuel
Injector Nozzle Replace/Repair).
(2) Repair or replace defective fuel injector
nozzle and holder assembly (WP 0114, Fuel
Injector Nozzle Replace/Repair).
b. Fuel injector nozzle valve stuck closed or
orifice plugged.
(3) If defective fuel injector nozzle is found, the
fuel injection pump must be tested for
damage.
Replace defective fuel injection
pump (WP 0115, Fuel Injection Pump
Assembly Replacement).
PROBABLE CAUSE
CORRECTIVE ACTION
(1) Locate faulty nozzle (as described earlier in
this work package).
c. Fuel injector nozzle holder spring failed
(result of improper installation of nozzle).
(2) Repair or replace fuel injector nozzle and
holder assembly (WP 0114, Fuel Injector
Nozzle Replace/Repair).
(1) Locate faulty fuel injector nozzle.
d. Fuel leakage at fuel injector nozzle body.
(2) Repair or replace fuel injector nozzle and
holder assembly (WP 0114, Fuel Injector
Nozzle Replace/Repair).
MALFUNCTION 9:
Fuel injector tube high-pressure fuel leakage.
PROBABLE CAUSE
CORRECTIVE ACTION
(1) Tighten fitting nut.
(2) Inspect tubing sleeve.
a. Fitting loose, tubing cracked or broken.
(3) Replace defective tube (WP 0113, Fuel
Injection Tube Replacement).
b. Fuel injector tube clamps (loose or missing
clamps allow tube vibration resulting in fuel
leaks).
(1) Tighten loose clamps, replace damaged
clamps and install missing clamps
(WP 0113, Fuel Injection Tube
Replacement).
WP 0020 00-11


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