TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 83 of 1207
TM 9-2320-361-20
1-22. SPECIAL PURPOSE BODIES SYSTEMS OPERATION (Contd)
d. Water Tank System Operation (M50A2, M50A3).
Water tanks M50A2 and M50A3 are used for transferring quantities of water. They can operate in cold
weather using the exhaust pipe cap which causes engine exhaust to be diverted under the water tank. This
warms the water to prevent it from freezing in temperatures below 32°F (0°C). The water tank system
differs in operation compared to the fuel tank system operation. Refer to para. 1-22e for description of major
water tank components and para. 1-19e for exhaust components.
e. Fuel Tank System Operation (M49A2C).
The fuel tank is used to transport and dispense quantities of fuel. Fuel is dispensed with the use of a
pump driven by engine power through the transfer case PTO. Major components of fuel tank system are:
1-70
DISCHARGE VALVE CONTROL LEVERS
- Two manual control levers that allow fuel to be
discharged from either front or rear compartment of tank body.
METER
- Indicates quantity of fuel dispensed.
FUEL FILTER/WATER SEPARATOR
- Separates water from fuel and removes contaminates from
fuel before distribution.
PRESSURE GAGE
- Checks condition of filter elements by indicating difference in pressure
between inlet and outlet side of filter.
SUMP-
Collects water from separator and drains through the manual drain valve.
GATE VALVES
- Provide a means of turning on or shutting off flow of fuel.
MANIFOLD DRAIN
- Accepts fuel from discharge pipes and transfers it to pump.
PUMP-
Draws fuel from tank and discharges it under pressure.
EMERGENCY CONTROL LEVER RELEASE
- When actuated, it allows discharge valve control
levers to return to OFF position which stops flow of fuel.
STATIC REAR AND GROUNDING WIRES
- Transmits any static electricity produced by fuel
flowing through the piping harmlessly to the ground. The grounding wires are pulled out from static
reel and attached to ground and vehicle to be fueled.
MANUAL DRAIN VALVE
- Provides a means to periodically drain water from sump.
DUMP VALVE
- When opened, water collected by fuel filter/water separator is automatically
allowed to drain out.
FUEL DISCHARGE PIPE
- Receives fuel from tank body compartments and directs it to fuel
filter/water separator.
DISCHARGE VALVE
- Operates by cables and is used to drain front and rear tank compartments.
FRONT AND REAR DISCHARGE VALVE CABLES
- Connect discharge valve control levers to
the two discharge valves.
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