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 101 of 1563

TM 9-2815-220-24

ENGINE CRANKS TOO SLOW

0007 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:

Cranking speed too slow for starting: (below 90 rpm).

PROBABLE CAUSE

CORRECTIVE ACTION

a. Batteries partially discharged.

(1) Check battery condition:

PROCEDURE

OBSERVATION

ANALYSIS

Indicator (Battery/Generator) Preliminary Check

Indicator needle at extreme left (no

voltage indicated).

Indicator satisfactory.

Master switch “OFF”.

Indicator needle at any position other than

extreme left.

Indicator defective.

Indicator needle moves into “yellow” area

(indicating battery voltage) with panel

lights on.

Indicator satisfactory.

Turn master switch

“ON”.

Indicator needle does not move from

extreme left position with panel lights on.

Indicator defective.

Battery Preliminary Check

Indicator needle in “yellow” area.

Battery charge

satisfactory.

Indicator needle in left “red” area.

Batteries discharged.

Indicator needle in “green” area.

Batteries overcharged.

Turn master switch

“ON”.

Indicator needle at extreme left position.

Batteries dead or cables

disconnected or

corroded.

PROBABLE CAUSE

CORRECTIVE ACTION

b. Incorrect seasonal grade of oil.

Applies in

cold weather.

(1) Drain and refill with proper oil (refer to

pertinent vehicle lubrication order).

END OF WORK PACKAGE

WP 0007 00-1 (2 blank)