A-A-58009B
2.2.2.1 High idle switch. A high idle switch, which does not increase engine speed more than 25
percent above normal low idle speed and does not exceed the engine manufacturer's
recommendation, may be provided to increase alternator, air compressor, or air conditioning
compressor output to meet the maximum load requirements. A lighted rocker switch, accessible
from the driver's seated position, shall activate the high idle control unit. The high idle switch
shall operate only when the vehicle is out of gear and the parking brake is engaged and shall
automatically disengage if the transmission is placed in gear or the parking brake is released.
2.2.2.2 Fuel filters. Primary and secondary fuel filters and a fuel/water separator shall be
provided. The fuel/water separator shall include a water coalescer and a drain valve, and shall be
in accordance with SAE J1839. A combination fuel filter and fuel/water separator may be
provided. Fuel filter elements shall be replaceable without loss of engine prime.
2.2.3 Exhaust system. The exhaust system outlet(s) shall be directed away from personnel
accessing equipment compartments or the roof access ladder.
2.2.3.1 Exhaust filter system. When specified (see 6.2), the vehicle shall be equipped with an
exhaust filter system. The system shall remove all visible smoke from the exhaust for an
adjustable period of 10 to 99 seconds after the vehicle starts, at all times when the vehicle is in
reverse gear, and for an adjustable period of 10 to 99 seconds after the vehicle's transmission is
shifted out of reverse. The time of filter operation shall be easily set by a mechanic with common
hand tools. The system shall be completely automatic, not requiring action by any personnel at
any time, with the exception of normal maintenance. Operation of the system shall not be
detrimental to the vehicle or any vehicle components. The system shall protect the engine by
automatically preventing itself from activating when back pressure exceeds 1.8 pounds per
square inch (psi), at which time a light on the cab dash shall indicate that the filter requires
changing. The filter shall be easily replaced by a mechanic using common hand tools.
2.2.4 Brake system. The vehicle shall be equipped with an all-wheel antilock brake system; the
brakes shall be fully air-actuated. Brakes shall be in accordance with Code of Federal
Regulations (CFR) 49 CFR 393.40 through 393.42(b)), 393.43, and 393.43 through 393.52. The
braking system complete with all necessary components shall include:
a. Air compressor having a capacity of not less than 15 standard cubic feet per minute
(scfm).
b. Air storage reservoir(s), each tank equipped with drain, and with safety and check
valves between the compressor and the reservoir tank.
c. Automatic moisture ejector on air storage reservoir.
d. Automatic slack adjusters on cam brakes or internal self-adjusting brakes on wedge
and disc brakes on all axles.
e. Spring set parking brakes.
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business