TM-9-2320-272-24-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4
JUNE 1998
TM-9-2320-272-24-2 - Page 3 of 991
TM 9-2320-272-24-2
WARNING SUMMARY
Hearing protection is required for the driver and passenger. Hearing protection is also required for
all personnel working in and around this vehicle while the engine is running (AR-40-5 and TB MED
501).
If required to remain inside vehicle during extreme heat, occupants should follow the water intake,
work/rest cycle, and other stress preventive measures (FM 21-10, Field Hygiene and Sanitation).
If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective
equipment. Consult with your unit NBC officer or NBC NCO for appropriate handling or disposal
instructions.
This vehicle has been designed to operate safely and efficiently within the limits specified in this
TM. Operation beyond these limits is prohibited by IAW AR 70-1 without written approval from the
commander, U.S. Army Tank-automotive and Armaments Command, ATTN: AMCPEO-CM-S,
Warren, MI 48397-5000.
Never work under dump body unless safety braces are properly positioned. Failure to do this will
result in injury to personnel.
During winching operation, never stand between vehicles. Assistant must remain in secondary
vehicle to engage service brake if cable snaps or automatic brake fails while towing vehicle. Failure
to do this may result in injury to personnel.
Accidental or intentional introduction of liquid contaminants into the environment is in violation of
state, federal, and military regulations. Refer to Army POL (para. l-7) for information concerning
storage, use, and disposal of these liquids. Failure to do so may result in injury or death.
Cleaning solvents are flammable and toxic. Do not use near open flame and always have a fire
extinguisher nearby when solvents are used. Use only in well-ventilated places, wear protective
clothing, and dispose of cleaning rags in approved container. Failure to do this will result in injury
to personnel and/or damage to equipment.
Eyeshields must be worn when cleaning with compressed air. Compressed air source will not exceed
30 psi (207 kPa). Failure to do so may result in injury to personnel.
Extreme care should be taken when removing surge tank filler cap if temperature gauge reads
above 175°F (79°C). Steam or hot coolant under pressure will cause injury.
Alcohol used in the alcohol evaporator is flammable, poisonous, and explosive. Do not smoke when
removing alcohol evaporator or adding fluid, and do not drink fluid. Failure to do this will result in
injury or death.
Do not perform electrical circuit testing fuel tank with fill cap or sending unit removed. Fuel may
ignite, causing injury to personnel.
When performing battery maintenance, ensure batteries are seated and clamped down, all rubber
boots are installed, clamps are well down on battery posts, and all battery cables lie flat against the
top of the batteries. Failure to do this may result in injury to personnel and/or damage to
equipment.
Ensure companion seatbelts are not caught inside battery box. This will cause belts to rot which
may lead to injury of personnel.
On M936/A1/A2 model vehicles, remove spare tire prior to changing tire and install tire in spare tire
carrier after tire change is complete. Operation of crane and/or vehicle engine while vehicle is on
jacks may result in injury to personnel or damage to equipment.
Never assemble or disassemble tire and rim assembly while inflated, use inflation to seat lockring
on split rim or tire on two-piece rim, or inflate a tire without a tire inflation cage. Injury to
personnel may result.
Do not disconnect air lines or hoses, remove safety valves or CTIS components, or perform brake
chamber repairs before draining air reservoirs. Small parts under pressure may shoot out with high
velocity, causing injury to personnel.
Warning b
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