Compressor and Clutch Assembly

An A/C compressor serves two primary functions. First, it pumps refrigerant type R-134a and refrigerant oil throughout the A/C system. Second, it compresses low-pressure R-134a vapor as it pumps, greatly increasing the pressure and temperature of the R-134a. The A/C compressor is driven by the crankshaft pulley via an A/C compressor drive belt. The A/C compressor circuit is completed when the climate control assembly A/C switch is pressed. Assuming all A/C system components are operating normally, the Powertrain Control Module (PCM) then energizes the compressor via the A/C clutch.

The FS-10 type A/C compressor is used in this vehicle. It is a Ford built A/C compressor with a displacement of 170 cc (10.40 cu. in.), and is lubricated with a charge of Motorcraft YN-12b Polyalkylene Glycol (PAG) refrigerant oil or equivalent refrigerant oil, meeting Ford specification WSH-M1C231-B. The evaporator to compressor suction line includes the suction and discharge manifold which is mounted on the rear face of the A/C compressor and is secured with a single bolt. A system pressure relief valve is located in the discharge line.