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A vehicular air cooling-ventilating system which provides cooled, filtered, and dehumidified air for the operating cab of a large off the road vehicle in a unitary package usually mounted in the cab overhead. Unit utilizes available hydraulic fluid power for all shaft horsepower requirements. A uniq

A vehicular air cooling-ventilating system which provides cooled, filtered, and dehumidified air for the operating cab of a large off the road vehicle in a unitary package usually mounted in the cab overhead. Unit utilizes available hydraulic fluid power for all shaft horsepower requirements. A unique compensated drive system provides operation of the pulsating torque compressor load by a hydraulic motor prime mover. The compensated drive system also provides operation in the presence of pulsating hydraulic fluid pressure commonly encountered in the supply of large vehicles. Internal components are protected from contamination by an air operated vent cover. Additionally, the difficult condensate handling problem caused by motion of the vehicle and consequences of condensate loss in the vehicle cab is overcome through the use of a flow metered baffle design in the condensate receiver.

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