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