A-A-58045B
required, a copy of the application approval from the tire manufacturer shall be added in the
Technical Order.
3.10 Braking system. The tow tractor shall feature a four-wheel, hydraulically operated braking
system with power assist. If an air system is used as the power assist, cab instrumentation shall
include an air pressure gauge and a low-pressure indicator with buzzer and/or warning light (see
3.15).
3.11 Parking brake. The tow tractor shall be equipped with a spring applied and hydraulic
release parking brake. A lockout system shall be provided so that the tow tractor will shut down
when the parking brake is on and the tow tractor is placed in forward or reverse gear. The
lockout system shall also include a cab-mounted warning light.
3.12 Air system. Reserved.
3.13 Electrical system. The tow tractor shall be equipped with a l2V or 24V electrical system.
The battery(ies) shall be maintenance free. All external chassis wiring shall incorporate weather-
proof connections and terminations. Exceptions to this are under-hood terminal strips and
electrical posts that are protected from the elements. Any wire splicing (typically resulting from
special-request options) shall incorporate a mechanically-crimped connector, solder and heat-
shrink tubing. All crimped-on wire components (i.e. Weatherpac or Metri-pac style connectors)
shall be installed using the appropriate crimping tool for the application. All wiring shall be of
the appropriate gauge for the amperage the circuit is drawing and/or protected to. Batteries shall
be accessible for daily inspection without the need for hand tools.
3.14 Frame structure. The tow tractor shall have an all-welded, one-piece frame structure.
3.15 Cab design. The tow tractor shall be equipped with an enclosed two-man cab. Interior cab
sound level shall not exceed 84 dB (A) with doors and windows closed. Doors shall be
constructed of rigid materials. The first entrance step to the cab shall not exceed 18 inches in
height from the ground. If there is more than one step to the cab (including the cab floor), then
each step shall be offset out from the next step up by at least 3 inches. Cab instrumentation shall
be standard commercial installation to include an hour meter, odometer, tachometer,
speedometer, voltmeter, engine oil pressure gauge, engine coolant temperature gauge,
transmission temperature gauge, and a fuel level gauge. If an air system is used as the power
assist for the braking system (see 3.10), cab instrumentation shall include an air pressure gauge
and a low-pressure indicator with buzzer and/or warning light. When specified (see 7.2 g), the
tow tractor shall have an Air Conditioning system. The tow tractor cab shall he equipped with
wipers, a windshield washer, driver and passenger-door rear-view mirrors, windshield-area rear-
view mirror, visors, heater/defroster, ventilating fan, interior dome light, seat belts, and other
equipment as found in standard commercial offerings. The driver's and passenger's seats shall
incorporate a scissors-type suspension for driver and passenger comfort.
3.16 Lighting. The tow tractor lighting shall be equivalent to the standard commercial offering
to include a front and rear coupling light, parking lights, head lights (high and low beam), brake
lights, turn signals, hazard lights, and reverse lights. A flashing amber beacon light shall be
4
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business