A/C Compressor & Clutch Assembly
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Internal FS18 A/C compressor components are not serviced separately. The A/C compressor is serviced only as an assembly. The clutch disc and hub, A/C compressor pulley and bearing, and clutch field coil are serviceable.
The FS18 A/C compressor has the following characteristics:
- A non-serviceable shaft seal.
- A pressure relief valve is installed in the rear of the compressor to protect the refrigerant system against excessively high refrigerant pressures.
- The A/C compressor uses PAG oil or equivalent. This oil contains special additives required for the A/C compressor.
- The A/C compressor oil from vehicles equipped with an FS18 A/C compressor may have some slightly dark-colored streaks while maintaining normal oil viscosity. This is normal for this A/C compressor because of break-in wear that can discolor the oil.
- Use standard oil matching procedures when installing new compressors.
| Item | Part Number | Description |
|---|---|---|
| 1 | - | A/C clutch bolt |
| 2 | 19D786 | A/C clutch disc and hub |
| 3 | 19D648 | A/C clutch disc and hub spacers |
| 4 | - | A/C compressor pulley snap ring |
| 5 | 19D784 | A/C compressor pulley |
| 6 | 19D798 | A/C clutch field coil |
When battery voltage is applied to the A/C compressor clutch field coil, the clutch plate and hub assembly is drawn toward the A/C clutch pulley. The magnetic force locks the clutch plate and hub assembly and the A/C clutch pulley together as one unit, causing the compressor shaft to rotate. When battery voltage is removed from the A/C compressor clutch field coil, springs in the clutch plate and hub assembly move the clutch plate away from the A/C clutch pulley.