Ford 4R3Z-19703-A Compressor Assembly

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The accumulator/drier and the orifice tube should be replaced whenever the compressor is replaced. Have the air conditioning system discharged and recovered. If you know the compressor is to be replaced, it's a good idea to have the professional who discharges your system perform a flushing procedure also, to remove any contaminants, dirt or metal that may corrupt the new compressor. Disconnect the negative cable from the battery. On 2001 and later models, remove the air cleaner tube. Disconnect the electrical connector from the compressor and detach the harness retainer from the back of the compressor. Remove the drivebelt. On 2001 and later models, remove the bolts and detach the power steering fluid reservoir from the bracket. Remove the bolt that secures the refrigerant lines to the rear of the compressor. On some models, the power steering lines are bolted to a bracket on the side of the compressor. Unbolt the compressor from the mounting brackets and lift it out of the vehicle. If a new compressor is being installed, follow the directions with the compressor regarding the draining of excess oil prior to installation. The clutch may have to be transferred from the original to the new compressor. Installation is the reverse of removal with the following additions: Replace all O-rings with new ones specifically made for air conditioning system used (R-12 or R-134a) and lubricate them with the proper refrigerant oil. Have the system evacuated, recharged and teak tested by the shop that discharged it.

The accumulator should be replaced whenever the compressor is replaced. On 2011 models, the drive belt does not need to be completely removed; it can be removed from the air conditioning compressor pulley only. Have the air conditioning system discharged. Disconnect the negative cable from the battery. On 4.0L engines, unbolt and set aside the power steering reservoir, then remove the four bolts and the power steering bracket. Disconnect the electrical connector from the compressor. Remove the drive belt. Remove the bolt that secures the refrigerant lines to the rear of the compressor. Plug the open fittings to prevent entry of dirt and moisture. On 2011 models, remove the compressor manifold bolts and remove the manifold and tube from the compressor. On 2011 4.0L V6 models, remove the inner fender well liner. Unbolt the compressor from the mounting brackets and lift it out of the vehicle. If a new compressor is being installed, follow the directions with the compressor regarding the draining of excess oil prior to installation. The clutch may have to be transferred from the original to the new compressor. Installation is the reverse of removal with the following additions: Replace all O-rings with new ones specifically made for air conditioning system use. Lubricate them with special PAG refrigerant oil designed for use in R-134a systems. Use mineral oil on R-12 systems. Do not use the wrong lubricant or you may contaminate the system! Have the system evacuated, recharged, and leak tested by the shop that discharged it.

Remove the drivebelt.

First, remove the drive belt(s) and the lower splash shield if equipped. Then, disconnect the electrical connector from the compressor clutch field coil. Remove the small brackets mounted to the compressor mounting fasteners. Disconnect the compressor inlet and outlet line manifold from the compressor. Finally, remove the compressor mounting fasteners and carefully remove the compressor.

On 2011 models, the drive belt does not need to be completely removed; it can be taken off from the air conditioning compressor pulley only. Discharge the air conditioning system, disconnect the negative battery cable, and on 4.0L engines, unbolt and set aside the power steering reservoir. Remove the power steering bracket and disconnect the electrical connector from the compressor.