1. Preparation and Safety:
* Disconnect the battery: This is crucial to prevent electrical shorts.
* Gather tools: You'll need wrenches (metric), sockets, a compressor clutch tool, refrigerant recovery/charging equipment (absolutely essential!), vacuum pump, possibly a manifold gauge set, and possibly a transmission jack to help support the components.
* Safety glasses and gloves: Protect yourself from sharp edges, refrigerant, and potential leaks.
* Recovery and Recycling: Before removing the old compressor, *completely recover the refrigerant* using a proper recovery machine. Releasing refrigerant into the atmosphere is illegal and harmful to the environment.
2. Removal of Old Compressor:
* Identify all components: Locate the compressor, hoses, mounting bracket, and related components. Take photos before disconnecting anything to aid reassembly.
* Disconnect hoses: Carefully disconnect the refrigerant lines and the compressor clutch wiring. Label each connection clearly to avoid mistakes during reinstallation. Use capped fittings to prevent contamination.
* Remove mounting bolts: Unbolt the compressor from its mounting bracket.
* Remove the compressor: Carefully remove the old compressor.
3. Installation of New Compressor:
* Inspect the new compressor: Ensure it's the correct model for your Bronco II.
* Install mounting bracket (if needed): If the bracket is damaged or needs replacing, install a new one.
* Mount the new compressor: Carefully install the new compressor onto the mounting bracket, ensuring it's securely fastened with the correct bolts and torqued to the manufacturer's specifications (found in your repair manual).
* Connect hoses: Carefully connect the refrigerant lines, ensuring they are properly seated and clamped.
* Connect clutch wiring: Reconnect the compressor clutch wiring, ensuring the connections are secure.
* Inspect for leaks: Before charging the system, carefully inspect all connections for leaks using leak detection equipment or soapy water.
4. System Evacuation and Charging:
* Evacuate the system: Use a vacuum pump to evacuate the system for at least 30 minutes to remove any moisture or air. This step is absolutely crucial to prevent damage to the compressor and other components.
* Charge the system: Use a refrigerant charging machine to add the correct amount and type of refrigerant to your system. The amount will be specified in your repair manual. Consult a professional for assistance if you're not experienced with this process.
5. Testing and Operation:
* Start the engine: Run the engine and check for leaks and proper compressor operation.
* Verify AC function: Check if the AC system is cooling properly.
Important Considerations:
* Refrigerant type: Use only the correct type and amount of refrigerant specified for your vehicle.
* Oil: The compressor likely requires a specific type of oil. Refer to your repair manual.
* Professional help: If you lack experience with automotive AC systems, it's highly recommended to seek professional help. Incorrect installation or charging can damage the system and be dangerous. Improper refrigerant handling is also illegal and environmentally damaging.
This detailed description provides a general overview. Always refer to a repair manual for your specific 1989 Ford Bronco II for accurate information and precise instructions. Failing to do so could lead to improper installation, system damage, and personal injury.
