MIL-T-62518 Trucks, Maintenance: With 9 To 37 Meters 30 To 120 Foot Multi-Position Aerial Platform, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive; four-wheel, four-wheel drive; and six-wheel, four-wheel-drive trucks having minimum gross vehicle weights GVW of 6800 kilograms kg 15,000 to 22 700 kg 50,000 pounds, equipped with maintenance bodies and 9 to 37 meters m 30 to 120 foot multi-position, articulating, boom type aerial platforms. 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-62518A

3.5.5.3.1 Receptacles. The generator shall be equipped with two receptacles: one U-ground,

120-volt, 30-ampere and one three-wire, twist-lock type, 240-volt, 15-ampere.

3.5.5.3.2 Engine for generator. The engine for the generator shall be an air cooled,

four cycle, magneto ignition gasoline engine having not less than 5.2 kW (7 horsepower). The engine fuel tank shall have a capacity of not less than 3.78 L (one gallon). The fuel tank shall have a drain and an inlet valve to the engine.

* 3.6 Aerial tower. Aerial tower structural components shall have a calculated design stress not greater than that allowed by ANSI A92.2. The aerial device shall be designed and constructed in its entirety in accordance with ANSI A92.2.

3.6.1 Turntable. The turntable assembly shall be rotated by a hydraulically operated motor. The turntable shall be so constructed as to eliminate all side thrusts on the motor shaft.

* 3.6.2 Fiberglass reinforced plastic. Fiberglass booms, basket(s) and components shall consist of extruded, molded, or spiral wound fiberglass. Each component shall conform to the performance requirements for electrical insulation specified herein. All components shall be made from a combination of multiple layers of sterile electrical grade fiberglass roving cloth,

mat or strands with high impact strength resins with weathering and fire-retardant characteristics.

The insulated booms shall have a hard, smooth surface inside and outside to prevent contamination and to preserve dielectric characteristics. When gelcoat is applied, the thickness of the gelcoat shall be not less than 0.16 mm (0.006 inch) and not more than 0.76 mm

(0.030 inch). The parts shall be free from uncured areas, gaps, cracks, holes, blisters, fuzzy

surfaces, resin pockets, areas lacking resin, laps, wrinkles, delamination, air or gas pockets, patches, porosity and other similar defects. The entire surface shall be smooth, fully cured and free of tackiness. Percentage of glass by weight shall be approximately uniform. The plastic construction insulation shall meet or exceed the specified performance requirements in 3.6.3.

* 3.6.3 Dielectric properties. The complete aerial platform (aerial device) shall conform to and shall pass the design, quality assurance and qualification tests required for a category A or category B aerial device rated at 69 kV in accordance with ANSl A92.2, without exceeding the maximum allowable boom currents specified in ANSI A92.2 for a 69 kV rating. Any mechanism within or along the insulated boom(s) shall be made of insulating materials, or so insulated as to demonstrate the same dielectric properties as the boom(s).