TM-9-2350-273-BD
M48/M60 SERIES TANK, COMBAT FULL-TRACKED 105-MM GUN
TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR
TM-9-2350-273-BD - Page 80 of 288
TM 9-2350-273-BD
COOLING
SYSTEM
SECTION II. BDAR Procedures
5-4.
. COOLING FAN FAILURE
General Information:
The AVDS-1790 engine utilizes two cooling fans.
The fan at the front of the engine
primarily cools the engine oil coolers. The rear fan cools the transmission oil coolers.
A damaged fan should be replaced. However, the transmission can function much
longer at a higher temperature than the engine.
The rear fan can be installed on the
front drive. However, the rear fan drive must not be disabled because it drives the
engine fuel injector pump. Fans from AVDS-1790 series engines are interchangeable on
the M48A5, M60, M60A1, M60A3, and M88A1 vehicles. If a fan is defective operate at
low speeds and monitor power pack oil temperatures.
Limitation:
Reduced mobility
Personnel/Time Required:
2 to 3 soldiers
Less than 2 hours
Materials/Tools:
Replacement fan, or rear fan
Spacer, fan hub sleeve, NSN 4910-00-795-7952
Procedural Steps:
1. Remove rear deck.
2. Remove defective fan assembly.
3. When replacement fan is not available,
replace the front fan with rear fan. The
overflow of air from front fan will help
cool the transmission.
4. Install the fan spacer in place of
the removed fan.
5-3
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