Tools You'll Likely Need:
* Pulley puller: A specific power steering pump pulley puller is ideal. These are usually three-jaw pullers designed to grip the pulley without damaging it. Improvising can lead to a damaged pulley or pump.
* Socket wrench and sockets: To remove and install bolts holding the pulley to the pump shaft.
* Torque wrench: Essential for tightening the pulley to the correct specification; over-tightening can damage the pump shaft.
* Wrench (possibly): Depending on the design, you might need a wrench to hold the pump shaft still while tightening or loosening the pulley.
* Clean rags or shop towels: To keep the area clean and prevent debris from getting into the pump.
* Penetrating oil (like PB Blaster): To help loosen any stubborn bolts.
Procedure:
1. Disconnect the battery: This is a crucial safety step to prevent accidental shorts or damage.
2. Remove the old pulley: This is the hardest part. If the pulley is seized, apply penetrating oil and let it soak for a while. Use the pulley puller according to its instructions. It will typically involve screwing the puller into the center of the pulley and applying pressure to pull it off the shaft. Be patient and avoid using excessive force, which could damage the pump shaft.
3. Inspect the pump shaft: Check the shaft for any damage, scoring, or excessive wear. Replace the pump if there is significant damage.
4. Inspect the new pulley: Ensure the pulley is undamaged and free of any burrs or imperfections.
5. Install the new pulley: Carefully align the new pulley onto the pump shaft.
6. Tighten the pulley bolt(s): Tighten the bolt(s) holding the pulley to the pump shaft using the correct torque specification from your vehicle's repair manual. Do not over-tighten.
7. Reconnect the battery:
Important Considerations:
* Shaft Key: Many power steering pumps use a keyway on the shaft to properly position the pulley. Ensure this key is properly aligned before tightening the pulley bolt.
* Pulley Alignment: Make sure the pulley is seated correctly and flush against the pump.
* Torque Spec: Using the correct torque is crucial. Over-tightening can strip the threads or damage the shaft. Under-tightening can lead to the pulley coming loose. This information is vital and should be found in a repair manual specific to your 1995 Chevy pickup.
If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Improper installation can lead to serious problems, including power steering failure. Remember safety first!
