By Paul DeGuiseppi, MACS manager of service training The Mobile Air Conditioning Society’s blog has been honored as the best business to business blog in the Automotive Aftermarket by the…
From MACS Technical Think tank Controller area networks may be the new standard, but even they have three different levels, or speeds, at which they operate. CAN C is the…
New 2010/2011 data from the Professional Automotive Repair Technician Survey (P.A.R.T.S.) shows that only 5 percent of technicians responding to the survey keep A/C Compressors in stock. They rely on 2.8 sources when it comes time to re-stock for the three jobs per month, on average, they perform requiring this part. P.A.R.T.S. is conducted annually by Counterman magazine and tracks technician preferences in a number of product categories.
By Jim Taylor, Editor MACS ACtion Magazine In California, plaintiff Kerry O’Shea has brought suit against Ford Motor Company, alleging that the company built and sold vehicles that “are defective…
1) What is HFO-1234yf?
HFO-1234yf is a chemical refrigerant that will be used in new cars in place of R134a.
Once again, the MACS office is beginning to receive calls about bad, contaminated or mislabled refrigerant. Some folks in theU.S.are receiving offers to purchase refrigerants that contain hydrocarbons (HC), notably under the designations HC-12a or similar names. All of these are listed as “unacceptable for use” on the EPAs companion page to the SNAP list.
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.
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
