Freestar V6-4.2L VIN 2 (2004)
Compressor Clutch: Description and Operation
A/C COMPRESSOR AND CLUTCH ASSEMBLY
NOTE:
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Internal A/C compressor components are not repaired separately. The Visteon FS-10 A/C compressor is repaired only as an assembly. The A/C
clutch disc and hub assembly, A/C clutch pulley, A/C clutch field coil and the compressor shaft seal are repairable.
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Installation of a new suction accumulator/drier is not required when repairing the air conditioning system except when there is physical evidence of
system contamination from a failed A/C compressor or damage to the suction accumulator/drier.
The Visteon FS-10 A/C compressor has the following characteristics:
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A ten-cylinder swashplate design utilizing the tangential design mount.
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A one-piece lip-type seal (installed from the front of the A/C compressor) is used to seal it at the shaft opening in the assembly.
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Five double-acting pistons operate within the cylinder assembly. The pistons are actuated by a swashplate that changes the rotating action of the
shaft to a reciprocating force.
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Reed-type discharge valves are located between the cylinder assembly and the head at each end of the A/C compressor.
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The A/C compressor uses PAG oil or equivalent. This oil contains special additives required for the A/C compressor.
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The A/C compressor oil from vehicles equipped with an FS-10 A/C compressor may have a dark color while maintaining a normal oil viscosity.
This is normal for this A/C compressor because carbon from the piston rings will discolor the oil.
A/C Compressor Clutch Assembly
The magnetic A/C clutch disc and hub assembly has the following characteristics:
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The A/C clutch drives the compressor shaft.
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When battery positive voltage (B+) is applied to the A/C clutch field coil, the clutch disc and hub assembly is drawn toward the A/C clutch pulley.
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The magnetic force locks the clutch disc and hub assembly and the A/C clutch pulley together as one unit, causing the compressor shaft to rotate.
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When B+ is removed from the A/C clutch field coil, springs in the clutch disc and hub assembly move the clutch plate away from the A/C clutch
pulley.
