How to Reattach an Alternator Pulley Wheel

The alternator pulley wheel is an important part of the car alternator. It basically spins with the belt to help produce energy to recharge the battery. When the wheel is not in its proper position, it may be caused by a loose bolt or an internal damage. When reattaching alternator pulley wheel, it is a good time to check the alternator and inspect all parts for damage.

Tools and Materials

  • Socket set
  • Screwdrivers
  • New bolts
  • Other replacement parts

Step 1 – Detach the Battery

Detach the battery’s positive terminal by loosening the nut counterclockwise. Pull it away from the battery so that the terminal does not touch the metal post.

Step 2 – Detach the Belts

There are two ways to do this. The first one involves pressing the tension puller arm to allow the belts to get loose. As soon as the belts slack off sufficiently, slide them off the wheel. Another method that you can use involves removing the mounting and adjustment bolts from the alternator until the belt can be removed. This applies to old single-pulley style systems. Be careful not to remove the belts from the engine, only from the alternator.

Step 3 – Tighten the Mounting Bolts on the Wheel

If the problem is simply caused by a loose bolt, the wheel can be reattached easily by tightening the bolts in place. To ensure that they are correctly aligned, remove them first from the system using a wrench. Insert them back and retighten. Be careful not to put too much tension to avoid damage. Place the belt back into position.

Step 4 – Replace the Mounting Bolts

Inspect the threads on the mounting bolts and check for any signs or damage. Purchase new bolts to replace all damaged ones. Reattach the wheel back to the alternator. Align the wheel correctly and insert the bolts properly. Tighten them carefully.

Step 5 – Remove the Entire Alternator

If none of the above steps helps solve the problem, it is best to remove the entire alternator first. Disconnect the wiring connections on the harness. Remove the wire nuts counterclockwise and pull out the wires. Remove the mounting and adjusting bolts with a wrench and pull the device out of the engine. All bolts should be loosened in a counterclockwise direction.

Step 6 – Inspect the Device

Disassemble the wheel from the alternator and check for any damage in the system especially in the bolts, the rubber gaskets and the metal washers. Keep in mind to replace damaged parts. If the alternator itself has incurred damage, then it has to be replaced. If the belt is worn out, replace it as well.

Step 7 – Reinstall the Entire Alternator

When all damaged parts have replacements, reconnect the wheel back to the device following the correct order of the gaskets and washers. Slide the alternator to the mounting bracket in the engine and secure it with undamaged bolts. Reconnect the belt to the wheel and the wires to the harness. Reconnect the positive battery cable as well. Test the engine.