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 113 of 1563

TM 9-2815-220-24

ENGINE OVER SPEEDS

0011 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.

MALFUNCTION 1:

Over speeds during vehicle operation.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Vehicle operating on steep downgrade.

(1) Apply vehicle brakes to avoid over-speed.

(1) Inspect cooling fans (WP 0053, Cooling

Fan Inspection).

b. Cooling fans malfunction.

(2) Inspect cooling fan drives (WP 0129, Fan

Drive Clutch Assembly and Associated

Parts Replace/Repair).

c. Governor improperly adjusted.

(1) Adjust per TM 9-2910-212-34&P or replace

fuel injection pump (WP 0101, Fuel

Injection Pump Assembly Replacement).

MALFUNCTION 2:

Engine speed excessive with accelerator pedal released.

PROBABLE CAUSE

CORRECTIVE ACTION

a. Accelerator or throttle stuck or

disconnected.

(1) Inspect throttle linkage (WP 0122, Throttle

Control and Manual Fuel Shutoff

Replace/Repair).

(WP 0123 for 2DR)

b. Fuel control stuck.

(1) Refer to WP 0020, Fuel System Abnormal

Conditions.

c. Fuel injection pump governor defective.

(1) Replace fuel injection pump (WP 0115,

Fuel Injection Pump Assembly

Replace/Repair).

END OF WORK PACKAGE

WP 0011 00-1 (2 blank)