MIL-T-62032 Trucks, Tank: Fuel Servicing And Aircraft Fuel Servicing, 1,000 To 4,000 Gallon, Diesel And Gasoline Engine Driven, 16,000 To 50,000 Pounds Gvw, 4X2, 4X4, 6X4, And 6X6, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two- or four-wheel drive, and six-wheel, four- or six-wheel drive, single or dual delivery fuel servicing and aircraft fuel servicing tank trucks, with product capacities from 1,000 to 4,000 gallons, having minimum gross vehicle weights GVW of 16,000 to 50,000 pounds for normal operating conditions. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62032H

controls to accomplish the corresponding pumping mode. The control for the automatic flow control valve shall automatically revert to the closed position when the selector valve is placed in the defuel position.

3.8.9.3.2 Deadman control. A deadman control shall be provided and shall be of the air-operated type. The deadman control shall consist of not less than a 50-foot hose with a deadman control at the free end. The hose shall be stored on a spring loaded reel. The deadman control shall provide control of a pressure control valve (see 3.8.5.5) and shall prevent operation of the pressure control valve unless the deadman control is operated. The deadman control reel shall be located in the driver's side underslung cabinet and shall be so designed as to prevent overrunning at end of rewind. Means shall be provided to deactivate the deadman control for overwing refueling, and to reactivate the deadman automatically for pressure refueling. The means shall be keyed as to which nozzle is out of its holder, such that while the underwing pressure servicing nozzle is lifted, the deadman system is operative. When the overwing nozzle is lifted and the selector valve is in the "OVERWING" position, flow control shall be provided through the trigger control on the overwing nozzle.

3.8.9.3.3 Throttle. A deadman operated throttle control shall be furnished and shall be governor regulated. The control shall be of reliable design to provide repeated positive and smooth operation on demand. The throttle speed selector control shall have two speeds and shall be marked to indicate the dispensing rate applicable: "THROTTLE: OVERWING,

CLOSED-CIRCUIT AND DEFUEL--PRESSURE UNDERWING (50 psi)."

3.8.9.3.4 Emergency controls. Remote, emergency, quick acting controls for closing (but inoperable for opening) the automatic flow control valve shall be provided in accordance with paragraph 4-8.2 of NFPA No. 407. Three emergency controls shall be provided: One near the front of the tank on the driver's side; one near the rear of the tank on the side opposite the driving controls; and one accessible from the catwalk. The controls shall have fusible devices to insure automatic closing of the valve in case of fire, in accordance with paragraph 4-8.4 of

NFPA No. 407. Placarding for each emergency control shall comply with paragraph 4-8.3 of

NFPA No. 407.

3.8.9.4 Pressure servicing nozzle pressure gage. The nozzle pressure gage shall continuously monitor pressure at the venturi throat. The gage shall read a corrected pressure which simulates the actual pressure at the nozzle. The pressure gage shall be shock mounted and marked "UNDERWING NOZZLE PRESSURE." The gage shall be of adequate size and located so as to be readily visible during refueling. The gage shall have a compound scale with a range from minus 30 psig to plus 160 psig, and shall be accurate to within one percent of the full-scale range.