float that rises in water and sinks in fuel. Drain water from the unit by opening the manual drain valve
located at the bottom of the sump. Keep the valve open as long as water is running out. When fuel appears
close the value. While product is flowing through the separator, check the pressure differential. A 300 GPM
positive displacement meter is located on the right side of the roadside equipment cabinet. The meter
counter registers up to 9,999 gallons. A knob on the side of the meter is used to reset the counter. Turn the
knob clockwise until the counter is back to zero. The meter also has a totalizer which keeps a record of all
issues. There are three dispensing assemblies on the M131A5C tank semitrailer. One assembly is made up
of three 15-foot sections of 3-inch suction hose. These sections are stored in tubes located on the roadside
of the vehicle. The other two assemblies are housed in the roadside equipment cabinet. The one on the left
side of the cabinet is a 0-55 GPM dispensing assembly. It has a 50-foot section of 1 1/2-inch discharge
hose, a hose reel, and a 1 1/2-inch nozzle with a bonding clip and a plug. The assembly on the right side of
the cabinet is a 225 GPM dispensing assembly. It has a 50-foot section of 2 1/2-inch discharge hose, a hose
reel and a 2 1/2-inch nozzle with bonding clip and plug. The 2 1/2-inch nozzle comes with two nozzle spouts.
The standard 14-inch spout used for most fueling operations is normally attached to the nozzle. The 24-inch
spout, is used only for defueling operations and is stored on the left side of the fire extinguisher, in the
roadside equipment cabinet. Each dispensing assembly is controlled by a brake assembly and a rewind
mechanism. There are two fusible link connections and two fusible nut connections on the semitrailer. The
two fusible links are installed at the tank compartment discharge valves and the two fusible nuts are part of
the operating lever assembly. If there is a fire in any of these places, the fusible links and nuts melt and
close the tank compartment discharge valves.
Figure 4-1. M131A5C 5,000-gallon semitrailer.
M967 5,000-Gallon Semitrailer. The M967 5,000-gallon semitrailer is a bulk hauler with self-
load/unload capability. It is designed for general highway and limited cross-country use. It has a 5,000-
gallon capacity and weighs 13,000 pounds empty and 46,950 pounds full. The entire vehicle is about 31 feet
long, 8 feet wide, 9 feet high. The semitrailer can be transported by a C-130 aircraft. It is also designed to
be towed by a 5-ton, 6x6 truck tractor or similar vehicle equipped with a fifth wheel. It has a fording
capability of 24 inches in salt or fresh water without major component preparation. TM 9-2320-356-12&P
gives detailed information on this tank semitrailer. The stainless steel tank body of the M967 is constructed
as one 5,000 gallon compartment with evenly distributed integral baffles. The compartment has pressure
and vacuum vents and a manhole with locking device. There is a walkway on top of the tank body with a
slip-resistant steel grating. A ladder at the front of the tank leads to the walkway. The tank compartment is
connected by piping to the vehicle's fuel receipt and delivery system. This system is mounted on the
roadside of the vehicle. There is a pump and engine compartment, pump engine fuel tank, landing gear
crank, and landing gear ground board on the curbside of the vehicle. There is also a hose trough,
emergency valve shutoff, and two batteries on the curbside of the vehicle. There is a hose trough, landing
gear ground box, toolbox, and control panel on the roadside of the vehicle. There is also a portable
grounding rod and manifold valve on the roadside of the vehicle. The auxiliary engine and pump assembly
4-3
QM 5094
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