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

pilot check valve which will hold the outrigger in the retracted position without settling and which may be manually released.

3.6.7.1.2 Outrigger pads. Each outrigger shall be provided with a ground pad. Ground pads shall be of the hinged or fixed type. Each pad shall have a ground contact surface of not less

than 929 cm2 (144 square inches) for sizes 30 through 50, and not less than 2065 cm2

(320 square inches) for all other sizes. In order to provide the 2065 cm2 (320 square-inch) ground contact per pad, a portable pad for each outrigger may be furnished to be used in conjunction with manufacturer's standard pads. The portable pads shall be steel plates equipped with a handle. The vehicle body shall be equipped with secure stowage provisions for the portable pads. The stowage provisions shall be designed so as to prevent loss of the pads due to vehicle motion.

3.6.7.1.3 Outrigger warning light. A red warning light shall be installed in the cab in a conspicuous location to warn the driver when the outriggers are extended.

3.6.7.1.4 Circular level. A circular level, with 0 to 5 degrees reading, shall be furnished. The circular level shall be mounted in a protected position, visible from all outrigger controls. The circular level shall indicate the degree of body level as the outriggers are maneuvered.

The circular level shall be corrosion-resistant and resistant to inclement weather. A

corrosion-resistant warning plate shall be mounted adjacent to the level to indicate the maximum longitudinal incline and the maximum transverse slope in degrees on which the vehicle is

capable of safely operating.

3.6.8 Hydraulic system. A hydraulic fluid, nonconductive system consisting of all components required to perform all hydraulic operations of the boom assembly and outriggers with the degree of control specified herein shall be provided. The hydraulic system shall also include the components required to power the front mounted winch, when required (see 3.4.22). Mechanisms and reservoirs shall be positioned or shielded to prevent hazardous fluid contact with heated surfaces or electrical apparatus. A two-speed manual or an automatic hydraulic throttle actuator shall be furnished which increases the speed of the truck engine (and auxiliary engine, when furnished) when the pump is being loaded. An accumulator may be used as a component of the hydraulic system to provide the maximum degree of temperature control under continuous service. All hydraulic components shall comply with ANSI A92.2.

3.6.8.1 Hydraulic cylinders. All hydraulic cylinders shall incorporate seals to prevent entrance of moisture and dirt into the cylinders and leaks of hydraulic fluid from the cylinders. Preformed packings shall be used in the cylinders where static seals are required. Manufacturer's standard seals shall be furnished where applied to reciprocating parts. All