electrical system provides starting, lighting, and
instrumentation. Front and rear mounted pintles are
used for aircraft towing. A universal jet-engine start
unit mounts to the rear of the tractor.
A/S32A-32
AIRCRAFT
TOWING
TRAC-
TOR.—The A/S32A-32 Aircraft Towing Tractor (fig.
9-4), also called "The Spotting Dolly," is designed to
tow, turn, and position aircraft within the confines of an
aircraft carrier hangar deck. It is powered by a
three-cylinder diesel engine, which drives two main
hydraulic pumps. The hydraulic pumps supply fluid to
drive motors that turn two open-chain reduction drives
via two gearboxes at each main wheel, which operates
independently. A mechanical wheel clutch handle is
used to engage or disengage the drive wheels, enabling
the tractor to pivot on a caster wheel around its center
within a zero turning radius. A Joystick Control, next to
the operator's seat, is an electromechanical device used
to control the speed and direction of the spotting dolly's
movement. The lift cylinder, which raises and lowers
the lifting arms, and two spread cylinders, which keep
the arms pinned against the aircraft nose gear, are
powered by an auxiliary hydraulic pump. Several pairs
of axle pins that engage both sides of the nosewheel are
carried on the tractor and fit a variety of aircraft.
A/S32A-37
AIRCRAFT
TOWING
TRAC-
TOR.—The A/S32A-37 aircraft towing tractor (fig.
9-5)
is
an
inline,
6-cylinder,
diesel-powered,
liquid-cooled, 4-wheel drive vehicle used to move
heavy, shore-based aircraft. The full power shift
transmission has six forward and three reverse speeds.
The tractor's front wheels are steered by two hydraulic
cylinders,
and
all
wheels
are
equipped
with
hydraulically powered disc brakes. A two-seat, heated,
enclosed cab with removable doors is provided for
operator comfort in all weather. Two 12-volt batteries,
24-volt alternator, electrical system provides power for
lighting, instrumentation, control panels, starter motor,
transmission control, switches, wiper/washer motor,
and heater/defroster. The tractor is capable of 35,000
pounds of drawbar pull with the traction ballast kit
installed.
A/S32A-42 AIRCRAFT MID-RANGE TOW
VEHICLE.—The A/S32A-42 aircraft mid-range tow
vehicle (fig. 9-6) is a 4-cylinder, diesel-powered,
9-3
ANF0906
JACK STAND
LOCATION
(ON FRAME)
JACK STAND
LOCATION
(ON FRAME)
LIFT/TIE-
DOWN
LOCATION
LIFT/TIE-
DOWN
LOCATIONS
LIFT/TIE-
DOWN
LOCATION
Figure 9-6.—A/S32A-42 aircraft mid-range tow vehicle.
