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 103 of 1563

TM 9-2815-220-24

ENGINE FAILS TO START AT NORMAL CRANKING SPEED

0008 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:

Cylinders not firing (insufficient fuel or incomplete combustion).

PROBABLE CAUSE

CORRECTIVE ACTION

a. Out of fuel.

(1) Refuel.

b. Air in fuel system.

(1) Bleed and purge system (WP 0020, Fuel

System Abnormal Conditions).

(1) Operate engine intake manifold heater to

assist in starting (refer to pertinent vehicle

manual).

c. Cylinders too cold. Applies in cold weather.

(2) If engine does not start, check heater

operation as follows:

PROCEDURE

OBSERVATION

ANALYSIS

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 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 heater

is inoperative.

Heater Voltage Checks

NOTE

Disconnect purge pump fuel hose quick-disconnect coupling at engine

before performing test.

WP 0008 00-1