Refrigeration System

The V5 A/C compressor is belt driven from the engine crankshaft through the compressor clutch pulley. The compressor pulley rotates without driving the compressor shaft until an electromagnetic clutch coil is energized.. When voltage is applied to energize the clutch coil, the clutch plate and hub assembly is drawn toward the pulley. Magnetic force locks the clutch plate and pulley together as one unit to drive the compressor shaft.

When the compressor shaft is driven, the compressor pulls low-pressure, low temperature vapor from the accumulator, compresses it into high-pressure, high temperature vapor, and pumps it into the condenser. Carried with the refrigerant is the refrigerant oil which is used to lubricate the compressor.

When the engine is turned off with the A/C system operating, the refrigerant in the system will flow from the high pressure side of the expansion tube to the low pressure side until the pressure is equalized. This may be detected as a faint sound of liquid flowing (hissing) for 30 to 60 seconds and is a normal condition.

Unit Repair Information

Bench repair procedures for the A/C compressor can be found in V-5 Air Conditioning Compressor Service or Unit Repair.