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 163 of 1563

TM 9-2815-220-24

INTAKE MANIFOLD HEATER ABNORMAL OPERATION

0023 00

THIS WORK PACKAGE COVERS:

Troubleshooting Table and Diagnostic Tests

INITIAL SETUP:

Tools:

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

Personnel Required

Track Vehicle Repairer (2) 63H10

Equipment Conditions:

Engine installed in vehicle or ground hop.

MALFUNCTION 1:

Manifold heater inoperative.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Electrical or fuel system malfunction.

(1) Check manifold heater operation.

Repair or

replace defective parts as indicated by the

following tests.

PROCEDURE

OBSERVATION

ANALYSIS

Manifold heater Operational Check

Hold fuel shut-off (engine

"STOP") switch and crank

engine.

While cranking engine,

engage manifold heater

switch and hand operate

purge pump.

Evidence of heat indicates

manifold heater operation

is normal.

Place hand on intake

manifold heater housing.

Check both sides of engine.

Note housing temperature (warm

or hot to touch).

No heat indicates

manifold heater is

inoperative.

Replace

manifold heater

(WP 0088, Manifold

Heater Assembly and

Related Parts

Replacement).

WP 0023 00-1