A-A-58004F
air being dried. The dryer shall have a filter to screen out oil and solid contaminants. The dryer
shall have an automatic self-cleaning cycle and a thermostatically controlled heater to prevent
icing of the purge valve.
2.3.4.2 Compressed air shoreline. A flush mounted, checked, auto-eject compressed air shoreline
connection shall be provided to maintain brake system pressure while the vehicle is not running.
It shall be located on the exterior of the vehicle, either adjacent to the driver's door or within 6
inches of the left side front corner of the body. An air chuck shall be provided as loose
equipment.
2.3.4.3 Auxiliary braking system. The service brakes shall be augmented by one of the following
auxiliary braking systems:
a. A system which opens all or some of the engine exhaust valves near the end of the
compression stroke, thereby converting vehicle motion to a pumping loss. The engine
brake shall be approved by the engine manufacturer.
b. A controlled gate valve in the exhaust manifold, which produces engine back
pressure. The exhaust brake shall be approved by the engine manufacturer.
c. A hydrodynamic retarder integral with the transmission.
d. A dash mounted switch shall be provided to activate, modulate, or cut out the brake
augmentation. The switch shall be marked to indicate its position. When active, the
system shall be fully controlled by means of the conventional driving controls to
apply retardation during vehicle deceleration, and cut out in the other operating
modes.
2.3.5 Tires and wheels. The tanker shall be equipped with tubeless steel belted radial tires with
highway type tread rated for specified highway speeds (see 2.1.3.3) as well as off-road
conditions (see 2.3.1 above), mounted on steel disc wheel assemblies. If all tire and wheel
assemblies are identical, one spare tire and wheel assembly shall be provided. If two different
tire and wheel assemblies are provided, two spare tire and wheel assemblies shall be provided,
one of each configuration. Spare tire tread patterns, size, and type will be the same as those
mounted on the vehicle. Spare tires and wheels are not required to be mounted on the tanker. The
spare tire(s) and rim(s) shall be inventoried, crated and shipped as loose equipment.
2.3.6 Tire chains. When specified (see 6.2), the tanker shall be equipped with driver activated
automatic type tire chains for the rear axles.
2.2.7 Fenders. Rear fenders and fender liners having tire chain clearance shall be provided. For
vehicles painted Desert Tan, the fender flairs shall be painted Desert Tan.
2.3.8 Steering. The tanker shall be equipped with power steering.
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