Rebuilding an alternator is a fairly simple procedure, which anyone with basic automotive knowledge can accomplish. Although the construction of some brands will vary slightly, the basic anatomy of an alternator consists of the same components. Follow these steps as you learn how to rebuild an alternator.
This video shows you how you can repair a faulty alternator, with a $25 replacement component. You can buy ''Alternator Repair Kits'' and fix your own alternator for a fraction of...
If you choose to refurbish it completely, you can purchase new brushes, bearings, a voltage regulator, diodes, and more. For extensive damage or if the alternator is old, or even if you don''t have time to perform an in-depth repair, replace it with a new or remanufactured unit.
It''s popular because it''s user-friendly, a universal fit, readily available, and a bolt-in deal. You can swap the GM alternator into an early GM 4x4 or an early non-GM 4x4. Yep, it works...
The alternator is a crucial component of your vehicle’s charging system. It keeps the battery charged and provides power to the electrical system while the engine is running. Over time, the alternator components can wear down, and it may need to be rebuilt or replaced. Rebuilding an alternator can save you money and provide you with a good understanding of how this essential part works. In this article, we will go through the steps involved in rebuilding an alternator.
Step 1: Gather Tools and Materials
Before you start rebuilding an alternator, it’s essential to gather all the necessary tools and materials. Some commonly used tools include:
4. Screwdrivers (flathead and Phillips)
You’ll also need some replacement parts, such as:
3. Voltage regulator (if needed)
Step 2: Remove the Alternator
Before you can rebuild your alternator, you need to remove it from your vehicle. Disconnect the battery cables, then locate and remove the mounting bolts that secure the alternator in place. Slide out the unit from its bracket and unplug any electrical connections.
Step 3: Disassemble the Alternator
Start by removing the pulley nut, washer, and fan assembly from the front of the alternator. Next, remove various screws that hold together different exterior components like the rear cover plate, voltage regulator, brushes, diode heat sinks, and case halves.
Step 4: Inspect and Replace Components
Now that your alternator is disassembled inspect each part for signs of wear or damage thoroughly. Replace worn brushes with new ones, swap out any damaged diodes, and replace the voltage regulator if needed. Then, remove the bearings (front and rear) and install new ones.
Step 5: Reassemble the Alternator
Carefully put the alternator components back together following the reverse order of disassembly. Make sure all screws are tight, and electrical connections are secure.
Step 6: Test the Rebuilt Alternator
Before reinstalling your rebuilt alternator on your vehicle, it’s essential to test it. Manually spin the pulley to ensure that it moves smoothly with no resistance. Connect an alternator bench tester or use a multimeter to check for proper voltage output and operation.
Step 7: Reinstall the Alternator
Reinstall your rebuilt alternator by sliding it back into its bracket, securing all mounting bolts, and reconnecting electrical connections. After reinstalling, reconnect the battery cables and start your engine to make sure everything works correctly.
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