If you're replacing the compressor, also replace the accumulator and the orifice tube. REMOVAL: Have the air conditioning system discharged. Disconnect the cable from the negative battery terminal. Raise the vehicle and securely support it on jackstands. Remove the accessory drive belts. Unplug the electrical connector from the compressor clutch connector and the high-pressure cutout switch. Disconnect the refrigerant lines from the compressor. Plug the open fittings to prevent entry of dirt and moisture. Be sure to remove and discard the old refrigerant line fitting O-rings. Remove the compressor mounting bolts and remove it from the vehicle. INSTALLATION: If a new compressor is being installed, pour out the oil from the old compressor into a graduated container and add that amount of new refrigerant oil to the new compressor. Also, follow any directions included with the new compressor. The clutch might have to be transferred from the original compressor to the new unit. Installation is the reverse of removal. Replace all O-rings with new ones specifically made for use with R-134a refrigerant and lubricate them with R-134a-compatible refrigerant oil. Have the system evacuated, recharged, and leak tested by the shop that discharged it.