Quantcast ENGINE OVER SPEEDS

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TM 9-2815-220-24
ENGINE OVER SPEEDS
THIS WORK PACKAGE COVERS:
Troubleshooting Table and Diagnostic Tests
INITIAL SETUP:
Tools:
Personnel Required
General mechanic's tool kit (item 121, WP 0176)
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.
b. Cooling fans malfunction.
(1) Inspect cooling fans (WP 0053, Cooling
Fan Inspection).
(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
(1) Inspect throttle linkage (WP 0122, Throttle
disconnected.
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)

 


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