MIL-T-62021 Trucks, Pipe And Sewer Cleaner: High Pressure Water Jet Type, 5680 Liter 1,500 Gallon, 12 700 Kilograms 28,000 Pounds Gvw, 4X2, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive, 5680 liter L 1,500 gallon, high pressure water jet, pipe and sewer cleaner modified commercial trucks having a gross vehicle weight GVW of 12700 kilograms kg 28,000 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-62021E(AT)

* 3.5.7.4 High pressure cleaning gun. A high pressure, general purpose cleaning gun shall be provided. The gun capacity shall be 13.25 to 102 Lim (3.50 to 27 gpm) within a pressure range of 1379 to 5515 kPa (200 to 800 psi). A high pressure hose 7600 mm (25 feet) in length and

13 mm (0.50 inch) id shall be provided for use with the gun. The hose shall be equipped with fittings for connection to the gun and to a high pressure water outlet.

* 3.5.7.5 Containment system. The hose and hose reel shall be provided with a containment system. The containment system shall consist of an upper guard constructed entirely of extruded transparent polycarbonate thermoplastic. The polycarbonate thermoplastic shall have a minimum impact strength of 3200 Joules per meter (Jim) (60 foot pounds per inch) and shall be ultra violet (UV) stabilized for protection against yellowing. In addition, it shall, as a minimum, have a Rockwell hardness of M70, a tensile modulus of 2,068,410 kPa (300,000 psi) and a shear modulus of 758 420 kPa (110,000 psi). The entire upper guard shall be transparent to permit viewing the hose reel and sewer hose. The containment system shall easily retract in one continuous motion around the reel, without removing any parts, and shall extend past the reel edge not more than

25 mm (1 inch). The guard shall be hinged at the top and shall have a locking mechanism for locking the guard in the work position. In addition, a hose which will fit over the sewer hose shall be furnished and shall extend from within the upper guard to the manhole lip. The entire containment system shall be constructed so as to contain the sewer hose and couplings within should a burst occur.

3.5.8 Warning light. An amber rotating, vehicular warning light conforming to MS 51317-4 shall be furnished. The light shall be mounted with reinforcement on vehicle centerline for 360 degree visibility. The warning light shall be operated by means of a separate switch with a red indicator light located on the instrument panel in the cab, and marked to indicate the function of the switch.

3.5.9 Body mounting. The body shall be secured with U-bolts, twin studs, or brackets, and shall include breaker strips. At least the most forward pair of mounting devices shall be spring loaded to permit vertical movement between the chassis and body.

3.5.9.1 U-bolts or twin studs. When U-bolts or twin studs are used, there shall be not less than three U-bolts or twin studs per side. Each U-bolt or twin stud shall have a 14 mm

(0.5625 inch) diameter body with 16 mm (0.6250 inch) minimum thread diameter. Tie plates shall be at least 13 mm (0.50 inch) thick. The vehicle chassis frame shall be braced, using wood

blocks at each mounting point unless the mounting point is located at a full-depth, frame crossmember. Blocks shall incorporate a keeper strap or groove for the mounting bolt and shall

be of a width and thickness to assure retention. Two tie-back straps shall be provided, one on each side of the rear portion of the body sub frame to maintain body alinement on the vehicle

chassis. Forward body mounting bolts shall be located to the rear of the tapered portion of the breaker strips (see 3.5.9.3).