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 4 of 991
TM 9-2320-272-24-2
WARNING SUMMARY (Contd)
Remove all jewelry when working on electrical circuits. Jewelry coming in contact with electrical
circuits may produce a short circuit, causing extreme heat, explosions, and fling particles of metal.
Failure to do so will result in injury or death and damage to equipment.
Use eyeshields and follow instructions carefully when performing assembling, disassembling, or
maintenance on this device. Components of this device are under spring tension and may shoot out
at a high velocity. Failure to do so will result in injury to personnel.
Do not remove hoses with engine running or start engine with hoses removed. High-pressure fluids
may cause hoses to whip violently and spray randomly. Failure to do so may result in injury to
personnel.
Keep hands out from between metal surfaces when removing heavy components. Failure to do so
may result in injury to personnel.
Keep personnel out from under equipment and components of equipment when supported by only a
lifting device. Sudden loss of lifting power or shift in load may result in injury or death.
Do not drain engine, transmission, or radiator fluids, or remove lines containing these fluids, when
hot. Doing so may result in injury to personnel.
Vehicle will become charged with electricity if it contacts or breaks high-voltage wires. Do not leave
vehicle while high-voltage lines are in contact with vehicle. Failure to do so may result in injury to
personnel.
Wear hand protection when handling lifting and winching cables, hot exhaust components, and
parts with sharp edges. Failure to do so may result in injury to personnel.
Do not perform fuel system procedures while smoking or within 50 ft (15.2 m) of sparks or open
flame. Diesel fuel is highly flammable and can explode easily, causing injury or death to personnel
and/or damage to equipment.
Ensure drainvalve on aftercooler is open when filling cooling system. Failure to do so may result in
injury to personnel.
Turbocharger intake fins are extremely sharp and turn at very high rpm. Keep hands and loose
items away from intake openings. Failure to do so may result in injury to personnel.
Do not place hands between frame and radiator when removing screws from trunnion or lifting
radiator. Sudden changes in support may cause the radiator to shift, causing injury to personnel.
Air pressure may create airborne debris. Use eye protection or injury to personnel may result.
Air system components are subject to high pressure. Always relieve pressure before loosening or
removing air system components.
Wear safety goggles when using a hammer.
Ether is extremely flammable. Do not perform ether start system procedures near fire. Injury to
personnel may result.
Warning c/(Warning d blank)
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