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

pressure servicing and closed-circuit fuel servicing nozzles. The control system shall include a pump bypass valve, a pressure sensing venturi, dispensing hose reel shutoff valves, a filter/separator water slug discharge control, and operating controls. The pressure sensing venturi shall be located downstream of the filter/separator.

3.8.9.1 Pneumatic operation. The control system shall be pneumatically operated from the truck air brake system. Safety provisions shall be incorporated that will prevent loss of air in the air brake system in the event of failure of any portion of the control system. Components which operate with fuel and vehicle air under pressure shall be so designed that leakage of fuel into the air system or leakage of air into the fuel system cannot occur. Where possible, components or valves which operate with only one medium (either fluid or pneumatic) shall be used. The pneumatic power system shall be essentially a static system which releases air only when the controls are operated and only to the extent necessary to purge the components. Under no condition shall air be vented into the tank. The bottom loading system pneumatic and fuel components shall be protected with screens, filters, or other devices to prevent contaminants

from entering critical components. All pneumatic controls shall be compatible and designed to

provide reliable operation in the available air pressure range.

3.8.9.1.1 Pneumatic lines. All pneumatic lines shall be of corrosion-resistant metal and shall be secured to the tank or frame and protected from damage. All lines exposed to possible ground or brush contact shall be protected with skid plates. All pneumatic lines that pass through holes shall be grommeted against chafing.

3.8.9.2 Control panel. The pumping system shall incorporate a control panel on the driver's side of the truck in the underslung compartment. The control panel shall be located within easy reach and shall be clearly visible to an operator standing on the ground. The control panel shall be easily removable or accessible from the rear for maintenance purposes. The control panel shall contain the throttle speed selector control, selector valve control, dispensing hose reel shutoff valve controls, underwing or pressure servicing nozzle pressure gage, filter/separator differential pressure gage, contamination monitor differential pressure gage, pump discharge pressure gage, and pumping compartment light switch. The controls shall be arranged for the maximum convenience of the operator. All controls shall be protected from damage and inadvertent operation.

3.8.9.3 Operating controls. The operating controls shall include a selector valve, a throttle control, a deadman control, dispensing hose reel shutoff controls, and operating and emergency controls for the automatic flow control valve.

3.8.9.3.1 Selector valve. A selector valve shall be the primary operating control of the pumping system. The selector valve shall have positions for overwing, pressure servicing, and defuel. The selector valve shall provide for automatic adjustment of the pumping system