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 166 of 1563

TM 9-2815-220-24

INTAKE MANIFOLD HEATER ABNORMAL OPERATION

0023 00

MALFUNCTION 1:

(Continued)

Manifold heater inoperative.

PROCEDURE

OBSERVATION

ANALYSIS

Fuel System Checks

WARNING

•

Keep hands away from nozzle during test.

Moderate flow with each

stroke indicates normal purge

pump operation.

Purge Pump: Disconnect

purge pump fuel hose quick

disconnect coupling at

engine main fuel back flow

valve.

Hold coupling valve

open and operate purge

pump.

Note fuel with each firm stroke

of purge pump.

If flow is not evident, purge

pump is defective, or purge

lines are blocked or leaking.

See appropriate vehicle

technical manual.

Moderate flow with each

stroke indicates no in-line

filter restriction.

Filter

satisfactory.

Fuel Filter: Disconnect fuel

tube between fuel check

valve tee and manifold

heater fuel filter and

operate purge pump.

Note fuel flow with each stroke

of purge pump.

No flow, or restricted flow,

indicates filter is plugged.

See appropriate vehicle

technical manual.

WP 0023 00-4