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 100 of 1563

TM 9-2815-220-24

ENGINE FAILS TO CRANK

0006 00

MALFUNCTION 2:

(Continued)

Starter engages but engine does not crank (audible solenoid action or starter gear engagement).

PROCEDURE

OBSERVATION

ANALYSIS

Perform compression test to

determine if hydrostatic lock

has damaged engine

(WP 0033, Cylinder

Compression Test).

Cylinder(s) compression normal

(above 330 psi and less than 70

psi differential); go to END OF

WORK PACKAGE.

No hydrostatic damage.

PROBABLE CAUSE

CORRECTIVE ACTION

d. (Continued)

Engine hydrostatic lock.

(5) If compression test indicates damage to

engine, repair or replace as necessary.

e. Engine seized internally.

(1) Repair and replace as required.

(1) Check transmission (refer to pertinent

vehicle technical manual).

f.

Transmission "locked up".

(2) Repair or replace transmission as necessary

(refer to pertinent vehicle technical manual).

MALFUNCTION 3:

Starter drive spins, but engine does not crank.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Starter clutch slipping or engagement

assembly damaged.

(1) Replace starter assembly (WP 0049, Starter

Motor Replacement).

b. Engine starter drive gear damaged (teeth

milled).

(1) Remove starter (WP 0049, Starter Motor

Replacement) and inspect engine drive gear

(WP 0157, Starter Drive Mechanism

Repair).

END OF WORK PACKAGE

WP 0006 00-4