A/S32A-32 AIRCRAFT TOWING TRACTOR

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.