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|  MIL-T-62735
chafing and other damage. Size, bracing and reinforcements for the hitch mainframe members
and the lift frame vertical and horizontal members shall sustain the loads imposed under severe
loading conditions. The hitch shall be removable from the truck.
3.7.10 Snowplow hydraulic system. The hydraulic system shall include a pump, a
hydraulic fluid reservoir under the hood or integral with the hoist, controls, cylinder(s), hoses,
piping, and all other parts needed for operation. The system shall incorporate pressure relief to
prevent buildup of pressures exceeding the rating of any component.
3.7.11 Snowplow pump. Controls for the pump shall be operable by the seated driver.
Controls shall be identified in accordance with 3.10.5. The hydraulic pump shall be driven by
the engine fan belt, an electric motor or by the engine crankshaft. Belt driven systems shall have
application approval by the chassis manufacturer. Belt and crankshaft driven pump ratings shall
be adequate for continuous duty. The hydraulic fluid reservoir capacity shall be not less than
110 percent of the capacity required to fully operate the system.
3.7.12 Snowplow hoist cylinder. The hoist cylinder shall hoist the plow to provide not
less than 200 mm (8 inches) road clearance. The hoisting mechanism, hoist cylinder, and
hydraulic system shall hold the plow in the fully raised position while the truck is driven over
secondary gravel roads at speeds up to 48 km/h (30 mph).
3.7.13 Snowplow markers. Snowplow markers shall be provided for the street side and
the curbside of the snowplow. The markers shall be removable. The markers shall eliminate
snowplow position blind spots.
3.7.14 Snowplow hydraulic hoses. Hydraulic lines for the hydraulic cylinder and the
pump shall have quick disconnect hose couplings. Hose caps, pump caps and hydraulic cylinder
caps or other self-contained means to prevent entrance of contaminants in the hydraulic system
shall be provided. Caps shall have a corrosion-resistant security device to prevent loss.
3.7.14.1 Snowplow hydraulic standards. Hydraulic hose shall be single wire braid or
double wire braid, rubber covered, conforming to SAE J517. Hose fittings shall conform to
SAE J516. The hydraulic system shall incorporate a filtration system conforming to SAE J931.
3.7.15 Snowplow auxiliary lights. The snowplow shall include a set of raised auxiliary
dual beam headlights, parking lights, and turn signal lights. Parking and turn signal lights shall
use a single light bulb. The lights shall have mounts, adapters and appropriate wiring harness.
The system shall have quick disconnect, weatherproof plugs and receptacles. A high beam
indicator light shall be provided, readily visible to the seated driver.
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