Here's a general outline of the process. Specific steps may vary slightly depending on your Ranger's model and condition:
1. Preparation:
* Safety First: Disconnect the battery negative terminal. Use jack stands securely under the frame, never rely solely on a jack. Wear safety glasses and gloves.
* Gather Tools: You'll need a variety of tools, including:
* Jack and jack stands (rated for the weight of your truck's cab)
* Engine support (to prevent engine sag)
* Socket set (various sizes)
* Wrenches (various sizes)
* Breaker bar (may be needed for stubborn bolts)
* Pry bar
* Hammer
* Penetrating oil (PB Blaster or similar)
* New cab mounts
* Torque wrench (to tighten bolts to the manufacturer's specifications)
* Ratchet straps or chains (to secure the cab)
* Wood blocks (for support and protection)
2. Disconnect Components:
* Disconnect the battery: As mentioned above.
* Remove any obstructions: This might include parts of the exhaust system, wiring harnesses, or other components that interfere with accessing the cab mounts. Take pictures or make notes to help with reassembly.
* Locate and identify the cab mounts: There are typically four mounts, two at the front and two at the rear.
* Apply penetrating oil: Generously spray penetrating oil onto all the bolts attaching the cab mounts to both the frame and the cab. Allow sufficient time (ideally overnight) for the oil to penetrate.
3. Support the Cab:
* Use a strong jack: Carefully jack up the cab using a suitable jack point near the front of the cab. Never jack directly on the cab itself. Use a piece of wood to distribute the pressure.
* Secure the cab: Use ratchet straps or chains to securely hold the cab in the raised position. The cab needs to be supported safely and stably. Have a helper assist.
* Install Engine Support: Use an engine support to prevent the engine from sagging during the process.
4. Remove the Old Cab Mounts:
* Remove the bolts: Carefully remove the bolts attaching the old cab mounts to both the frame and the cab, using the appropriate sockets and wrenches. You'll likely need a breaker bar for some of the rusted or stubborn bolts.
* Remove the old mounts: Once the bolts are removed, carefully remove the old cab mounts. They may be stuck due to rust or corrosion; a pry bar may be necessary.
5. Install the New Cab Mounts:
* Position the new mounts: Carefully position the new cab mounts onto the frame and the cab.
* Install the bolts: Install the bolts and tighten them slightly.
* Lower the cab: Carefully lower the cab, ensuring it's aligned and the mounts are seated properly. Have a helper assist.
* Tighten the bolts: Once the cab is fully lowered and seated, fully tighten all bolts using a torque wrench to the manufacturer's specifications.
6. Reconnect Components:
* Reconnect any components: Reinstall any parts you removed earlier, ensuring everything is properly connected.
* Lower the truck: Carefully lower the truck to the ground.
* Test for movement: Carefully check for any movement or vibrations in the cab to ensure the mounts are properly installed.
7. Test Drive:
* Take a test drive: After completing the installation, take a test drive to ensure everything is working correctly. Pay attention to any unusual noises or vibrations.
Important Notes:
* Consult a Repair Manual: A factory service manual for your specific 1991 Ford Ranger is highly recommended. It will provide detailed instructions and diagrams specific to your vehicle.
* Rust and Corrosion: On a 30+ year-old truck, rust and corrosion can make this job extremely difficult. Penetrating oil and patience are your friends. Broken bolts are a possibility.
* Professional Help: If you're unsure about any part of this process, it's best to seek professional help. Improperly installing cab mounts can lead to serious safety issues.
This is a complex procedure. Again, if you're not comfortable tackling this yourself, take it to a qualified mechanic. The cost of repair may be less than the potential cost of an accident resulting from improperly installed mounts.
