F 350 4WD Super Duty V10-6.8L VIN Z CNG (2003)
Compressor Clutch: Description and Operation
A/C compressor and Clutch Assembly
NOTE:
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Internal A/C compressor components are not serviced separately. The FS-10 A/C compressor is serviced only as an assembly. The A/C clutch,
A/C clutch pulley, A/C clutch field coil and the shaft seal are serviceable.
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Whenever the A/C compressor is replaced due to a failure that produces debris in the system, also replace the suction accumulator and the A/C
evaporator core orifice.
The 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 (replaceable 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 Refrigerant Compressor Oil (R-134a Systems) or equivalent. This oil contains special additives required for the
A/C compressor.
Compressor Clutch Components
The magnetic A/C clutch has the following characteristics:
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It drives the compressor shaft.
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When battery positive voltage (B+) is applied to the A/C clutch field coil, the clutch plate and hub assembly is drawn toward the A/C clutch
pulley.
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The magnetic force locks the clutch plate and hub assembly and the A/C clutch 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 plate and hub assembly move the clutch plate away from the A/C clutch
pulley.
