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

3.5.14 Bottom loading adapter. Unless otherwise specified (see 6.2), the bottom loading adapter shall be of the Y-type or of the elbow and tee type, capable of connection to both a

four-inch coupler conforming to API RP 1004 and to a 2.5 inch type D-1 nozzle conforming to

MIL-N-5877. The adapter shall have a dry break feature and shall be on the side of the vehicle

opposite the driving controls. The adapter shall be furnished with a bonded nose seal. The adapter shall be provided with a poppet type, spring loaded check valve. The valve shall be full swiveling and free floating, forming a fuel-resistant seal to prevent leakage. Dust caps, complete with security cables or chains, shall be provided for the adapters. All parts of the adapters, valves, caps, cables and chains shall be corrosion-resistant. Non-electrical interference type interlocks shall be provided on air brake trucks to prevent movement of the vehicle when either leg of the bottom loading adapter is engaged for loading or, on hydraulic brake trucks, to prevent the engagement of either leg unless the parking brakes are set.

3.5.15 Emergency controls. The automatic flow control valve shall be operable by cable linked controls. An opening and a quick acting closing control for each compartment shall be located in the underslung cabinet. Controls shall be mounted to provide interference with one of the doors of the underslung cabinet to ensure that the valve is closed when the cabinet door is closed. In accordance with paragraph 4-14.4 of NFPA No. 407, remote, emergency,

quick-acting controls for closing the valve (but inoperable for opening) shall also be provided, one set near the door on the driver's side outside the driver's cab, one set at the rear of the body

on the side opposite the driver's side and one set operable from the catwalk. The controls, except the catwalk controls, shall be operable from a ground level standing position. Each control shall

be outlined by a contrasting color panel at least 12 inches square, identified with the words

"EMERGENCY SHUTOFF," and provided with indicator arrows or instructions such as

"PUSH," "PULL," or other appropriate wording. Identification and instruction wording shall be in letters not less than 2 inches high. In addition, the controls shall have fusible links to ensure automatic closing of the valves in case of fire. One set of fusible links shall be located near the emergency valves and another set near the plumbing system in the underslung cabinet.

* 3.5.16 Catwalk. A flat catwalk of type 304 stainless steel, covered with a special abrasive type of paint (ship's grip), shall be furnished over the full length of the top of the tank. The catwalk walking surface shall be above the tank shell and shall not follow the curvature of the top of the tank shell. Type 304 stainless steel liquid-tight flashing shall be installed around the catwalk. The catwalk shall be provided with front and rear drains and stainless steel drain lines on opposite sides of the vehicle and in such other locations as are necessary to prevent liquids from standing on the catwalk and on top of the tank. Catwalks, flashing and drains shall prevent the possibility of spilled fuel coming into contact with the exhaust system and exhaust shields and shall prevent water from entering the tank. Drain lines shall be external to the tank and shall be of not less than 1.5 inch stainless steel tubing. Drain outlets shall be located not less than 3 feet away from the exhaust system.