The towed aircraft air source unit mainly consists of a towed chassis, chassis frame, unit and air supply assembly. The air supply flow rate is ≥300PPM, and the auxiliary air supply is 1.7-2.1bar(25-30psi), which is adjustable. Start gas supply :2.4-2.9bar(35-42psi) Applicable aircraft models include Boeing 707, 717, 727, 737 series, 757, 767, 747 series, some B777, DC8, DC9, DC10, MD80 series, MD90, MD11, Airbus A320 series, A340 series, A300, A310, A330, that is, not adopted All models other than the GE90 engine
The base load-bearing capacity of the air source unit is 8 tons, with a maximum of 10 tons. It is connected to the upper and lower components by 6 huge connecting plates through 72 12.9 grade M16 bolts. The upper air source unit and the lower towed chassis can be separated as needed. The rear end of the main beam is welded with a hose slot assembly and can be used as a step. The chassis frame, cover shell and various units are fixed on the top. In the middle of the frame is where the fuel tank is stored. Fuel can be supplied to the diesel engine and the compressor through oil pipes. The tractor tows the trailer through the front pull frame at the front.
In order to facilitate the identification of the position of the air source unit and let the machine operators and maintenance personnel be familiar with the location of each component, it is now assumed that the radiator is at the front of the machine and the compressor is at the rear. The personnel stand at the rear of the machine, facing the unit. This type of machine is powered by a 4-stroke 6-cylinder turbocharged engine equipped with the Williams diesel electronic control system. The engine is equipped with a 24-volt vehicle battery and a DC charging system. The engine is equipped with an oil filter, a fuel filter and two full-flow engine fuel/water separators.
