A/C Compressor and Clutch


Only EPA-certified technicians can purchase R-12 refrigerant, since proper recovery and recycling techniques are required to prevent damaging the environment. Improper disposal of R-12 refrigerant can result in a fine.

a system with r-12 refrigerant can be Retrofit to use r-134a refrigerant.
Parts of the clutch and compressor.


  • Purge the system of refrigerant (If your car uses R-12 refrigerant, this step should be perform by an EPA-certified technician for proper recovery and recycling).
  • Disconnect the battery ground cable.
  • Remove the inlet and outlet hoses or the service valves from the compressor.
  • Remove the clutch lead wire.
  • Loosen and remove the belt(s).
  • Remove the mounting bolts from the compressor brackets and braces and lift the compressor from the car.


  • Remove the compressor and clutch assembly.
  • Remove the pulley and bearing assembly.

Shaft Seal

  • Using snap-ring pliers, remove the seal retaining snap ring.
  • Remove the seal seat using the seal seat remover and installer.
  • Remove the seal, using the seal remover tool.
  • Remove the shaft seal seat O-ring using the O-ring remover.
  • Flush the seal cavity with refrigeration oil.
  • Coat the new seal parts with refrigeration oil.
  • Install the new shaft seal O-ring. Make sure it is properly seated in the internal groove. Use the remover tool to position the O-ring properly.
  • Install the seal protector or dust cover on the compressor crankshaft.
  • Lubricate the part liberally with clean refrigeration oil.
  • Place the new shaft seal in the seal installer tool and carefully slide the shaft seal into place in the inner bore.
  • Rotate the shaft seal clockwise until is seats on the compressor shaft flats.
  • Rotate the tool counterclockwise until it seats on the compressor shaft flats.
  • Rotate the tool counterclockwise to remove the seal installer tool.
  • Remove the the shaft seal protector.
  • Place the shaft seal seat on the remover/installer tool and carefully reinstall in the compressor seal cavity.
  • Replace the seal seat retainer.