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 178 of 775
TM 9-2350-311-10
Item
No.
69
70
71
Interval
Weekly
Weekly
Weekly
Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
FOR M109 SELF-PROPELLED HOWlTZER - CONTINUED
Location
Item to Check/
Service
WARNING
2-84 Change 2
Driver’s Hatch
Winterization
Heater Kit
Personnel Heater
Crewmember
Procedure
DRIVER
a. Check driver’s hatch cover seal for tears or
deterioration.
b. Check for proper operation.
DRIVER
NOTE
(Seasonal) Check only when operation is required.
Check for proper operation. Inspect for any fuel or
exhaust leakage and electrical shorts.
DRIVER
If the personnel heater operates improperly,
fuel may overflow, causing danger of fire or
explosion.
Be alert during personnel heater operation for
exhaust odors or signs of exposure to carbon
monoxide. Carbon monoxide can cause death.
If present, shut off the personnel heater and
ventilate the vehicle.
Explosive/flammable materials are a fire haz-
ard. Do not store aerosol cans, solvents, fuel,
etc., anywhere inside vehicle. Stow ammuni-
tion and powder in authorized stowage racks.
Fumes may accumulate in the ventilating air
circuit or the personnel heater may be dam-
aged by reverse burning if it is not operated for
at least five minutes each time it is started.
a. Operate personnel heater for at least five min-
utes each week. Be alert for signs of damage,
loose fittings, loose connections, and fuel leaks;
notify unit maintenance if any are found.
b. Check crew/driver duct outlets for steady warm
output. If there is no warm air output, shut off
heater and notify unit maintenance.
Not Fully Mission
Capable If:
Any electrical
short is found.
Any exhaust leak
is found.
Any Class Ill fuel
leak is found.
Loose fittings,
loose connec-
tions, or fuel leak
exists.
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