TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 3 of 775
TM 9-2350-311-10
CARBON MONOXIDE POISONING CAN BE DEADLY
Carbon monoxide is a colorless, odorless, deadly poisonous gas, which, when breathed, de-
prives the body of oxygen and causes suffocation. Exposure to air contaminated with carbon
monoxide produces symptoms of headache, dizziness, loss of muscular control, apparent
drowsiness, coma, permanent brain damage, or even death from severe exposure.
Carbon monoxide occurs in the exhaust fumes of fuel-burning heaters and internal-combustion
engines and becomes dangerously concentrated under conditions of inadequate ventilation.
The following precautions must be observed to ensure the safety of personnel whenever the
personnel heater, main engine, or auxiliary engine of any vehicle is operated for maintenance
purposes or tactical use.
Do not operate heater or engine of vehicle in an enclosed area unless it is adequately ventilated.
Do not idle engine for long periods without maintaining adequate ventilation in personnel
compartments.
Do not drive any vehicle with inspection plates, cover plates, or engine compartment doors re-
moved unless necessary for maintenance purposes.
Be alert at all times during vehicle operation for exhaust odors and exposure symptoms. If either
is present, immediately ventilate personnel compartments. If symptoms persist, remove af-
fected personnel from vehicle and treat as follows: expose to fresh air; keep warm; do not permit
physical exercise; and if necessary, administer artificial respiration.
THE BEST DEFENSE AGAINST CARBON MONOXIDE
POISONING IS ADEQUATE VENTILATION.
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