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 143 of 1563

TM 9-2815-220-24

FUEL SYSTEM ABNORMAL CONDITIONS

0020 00

THIS WORK PACKAGE COVERS:

WP 0020 00-1

Troubleshooting Table and Diagnostic Tests

INITIAL SETUP:

Tools:

General mechanic’s tool kit (item 121, WP 0176)

Container (minimum 2 gallon/7.5 liter capacity)

Personnel Required

Track Vehicle Repairer (2) 63H10

Equipment Conditions:

Engine installed in vehicle or ground hop.

MALFUNCTION 1:

Air in system.

PROBABLE CAUSE

CORRECTIVE ACTION

(1) "Purge" fuel system.

Turn master and

in-tank fuel pump switches to "ON".

Operate in-tank fuel pump for 1 or 2

minutes.

Simultaneously operate purge

pump, completing 4 or 5 strokes after firm

handle pressure is noted.

CAUTION

Do not depress flame heater button.

Damage to engine could occur.

a.

Occurred during fuel filter replacement,

engine or power pack installation, or long

period shutdown.

(2) With in-tank pumps operating, open bleeder

valves (on cover of both primary and fuel/

water separator filters) until all fuel (no air)

is noted.

b.

Return fuel restriction.

(1) Refer to Malfunction 10 in this work

package.

c.

Damaged fuel hoses (fuel pump to filter, or

filter to fuel injection pump).

(1) Remove and install new hoses (WP 0084,

Fuel/Water Separator Automatic Drain

System and Wiring Harness Replacement).

MALFUNCTION 2:

Water contaminated fuel.

PROBABLE CAUSE

CORRECTIVE ACTION

a.

Automatic drain system inoperative.

(1) Refer to Malfunction 12 in this work

package.