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

road test, the front and rear suspension and the drivetrain shall be periodically inspected for interference and contact with other vehicle components. Abnormal contact of the drivetrain or suspension components with other components shall be cause for rejection. Front spring bumpers shall not make contact with frame stops except under the most extreme cross country conditions. Operational or mechanical failures of vehicle components during the road test shall be cause for rejection. Failure includes permanent deformation as well as breakage.

4.3.4 Cleaning. Prior to the beginning of air pressure or fluid flow tests, the vehicle shall be cleaned. The vehicle shall be carefully inspected for evidence of contaminants in the tank and fuel system, such as loose, spattered or excess solder, metal chips, grinding dust, or other debris. Test fluid, as specified in 4.3.10, shall be pumped through the system for a minimum of

10 minutes at not less than 80 gpm. Filter/separator and contamination monitor filter elements

shall not be in place. At the end of the 10 minutes, strainers and low point drains shall be examined for evidence of contaminants. If any trace of contaminants is found, the recirculation of test fluid at 80 gpm shall continue for 10-minute periods until all trace of contaminants has been removed. Strainers and low point drains shall be examined at the end of each 10-minute period. When all trace of contaminants has been removed, testing may proceed. Filter/separator and contamination monitor filter elements shall be reinstalled before flow testing.

4.3.5 Tank leakage test. To determine conformance to 3.5.4, after the road test the cargo tank shall be subjected to a static air pressure test at 5 psig for a period of not less than 5 minutes. A soap solution shall be applied on the exterior of the tank at all welds and joints as an aid in the visual detection of leaks. Vents and other normal pressure relief systems shall be sealed closed during the test.

4.3.6 Hydrostatic test pressure. The entire fuel dispensing system of types III and IV

vehicles shall be tested for conformance to paragraph 4-10.2 of NFPA No. 407.

4.3.7 Vent operation and pressure/vacuum holding tests. The contractor may use pressure transducers or other industry accepted methods to measure normal venting pressure limits for conformance to 3.5.11.1. A suggested test method suitable for the low pressures involved is as follows:

(a) Position the first production truck such that a test fluid hose can be connected between the bottom loading adapter and a pressurized source for filling the tank and a hose can be connected to a receptacle for discharging test fluid from the tanks. Partially fill the tank (required for steps (f), (g) and (h) below).

(b) Attach the vapor recovery flange to a U-tube water manometer (mercury

unacceptable). (The U-tube manometer can be fabricated from clear plastic tubing mounted on a ruled board.)