Boy! That Air Feels Good!, by Rod Barclay, covers the story of how three pioneers: a Fort Worth department store owner, a Dallas Cadillac dealer and a Dallas manufacturer of…
(illustration: Sanden International)Richard Hawkins is a technical advisor at 1-800-Radiator. He recently told MACS about a question he received from one of the company’s franchise offices.I cringe whenever I hear…
by Jacques Gordon If his customer ever questions the labor cost, Chuck Braswell uses pictures like this to explain why some jobs just take a little longer. At Rocky Mount…
There’s nothing cheaper or more benign than soap bubbles for finding a leak. As a technician with a 1999 Pontiac Bonneville complained, he tried trace dye and two different electronic leak detectors with no luck, despite the fact that the system was gushing between a half-pound and a pound overnight. But when he swabbed the compressor nose with soap solution, presto, it bubbled. His conclusion: back to basics does it.
1) What is HFO-1234yf?
HFO-1234yf is a chemical refrigerant that will be used in new cars in place of R134a.
Usually made of aluminum and mounted at the front of the vehicle, condensers are one of the two heat exchangers in a mobile air conditioning system. They are constructed as a series of tubes with fins surrounding the tubes. The fins attached to the tubes increase the surface area exposed to the air.
The compressor is usually belt-driven by the engine crankshaft, and engages through an electromagnetic clutch.
The Mobile Air Conditioning Society (MACS) Worldwide has been honored with two Automotive Communications Awards for its technical newsletter MACS Service Report. The September 2009 issue of the MACS Service Report covering A/C performance in hybrid vehicles was the winner in the business-to-business technical magazine article category and was chosen best in show for the business-to-business communication category. The awards were presented during the Car Care Council Women’s Board reception, which took place Tues., Nov. 2, at the Sands Expo Center during the Automotive Aftermarket Products Expo (AAPEX).
In a scroll compressor, a scroll shaped “paddle” rotates inside a channel. By the offset of the paddle drive pin, the compressor drive shaft rotates the paddle in an orbiting or circular motion.
There are two types of piston compressors currently in use, the opposed axial type, (also often referred to as the swash plate type), and the single row axial or wobble-plate type. Depending on design, these compressors may contain five, six, seven, or ten pistons.
With either type of piston compressor, the pumping action of the pistons draws low
