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TM 9-2330-272-14
2-21. PRESSURE DISCHARGE OF FUEL.
DO NOT smoke while loading or unloading fuel, when handling fuel containers, or when
located within 50 ft (15.3 m) of fueling or fuel storage areas. Failure to follow this
warning may cause a fire and explosion, resulting in serious injury or death to
personnel.
NOTE
. Product is not metered or filtered when using this unloading method.
. Refer to appropriate flow diagram at end of paragraph for assistance.
a. Shut down towing vehicle engine and set brakes. Refer to towing vehicle technical manual.
b. Remove fire extinguishers from mounting brackets and take to point of operation.
WARNING
Connect bonding and grounding connections before beginning any fuel handling
operation. Maintain bonding and grounding connections until after all fuel handling Is
completed. Connections must be made to clean, unpainted surfaces. An unbended
and ungrounded or Improperly bonded and grounded semitrailer could produce a
spark. The resulting explosion will cause serious Injury or death to personnel.
c. Connect bonding and grounding connections (para 2-13).
d. Ensure that all manually operated valves (2, 3, 4, 5, 6, 12, and 15) are closed. On M131A4C and
M131A5C, ensure that 3-way flow valve (24) is set in position 1 with operating lever pushed inward as far as possible.
e. On M131A4C and M131A5C equipped with a read-out flow selector dial, set selector knob to zero. Close
flow selector valve (0-55 gpm) (18).
WARNING
Use extreme caution when working or walking on top of semitrailer. Catwalk can
become slippery due to moisture or fuel spillage. Failure to follow this warning may
result In serious injury to personnel.
f. Have assistant open manhole fill cover of compartment (1, 8, 9, or 11) to be emptied (para 2-14).
g. Remove cap from pump discharge valve (6) outlet and connect transfer hose from outlet to fuel
receptacle.
h. Open emergency relief valve of compartment (1, 8, 9, or 11) to be emptied by pulling operating control
lever outward.
i.
Open manifold (2) valve of compartment (1, 8, 9, or 11) to be emptied.
j.
Open pump cutoff valve (4) and pump discharge valve (6).
WARNING
l DO NOT breathe fuel fumes. They are toxic and can cause serious medical problems.
Failure to follow this warning may result In serious injury or death to personnel.
l Give IMMEDIATE medical attention to personnel exposed to hydrocarbon or toxic
vapors. Signs of distress are weakness, nausea, coughing or Intoxication,
nosebleed or cramps, or other unusual symptoms. Qualified personnel able to
administer artificial respiration and simple first aid must be present.
k. Start auxiliary engine (para 2-15). Fuel will begin to flow.
2-52
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