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Rebuilding an alternator is a fairly elementary procedure, which anyone with basic automotive knowledge can accomplish. Although the construction of some brands will vary slightly, the bones anatomy of an alternator consists of the same components.[1] Follow these steps as you lot learn how to rebuild an alternator.

Steps Download Commodity

  1. i

    Disconnect the battery leads.

  2. 2

    Remove the air cleaner for easier to access the alternator.

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  3. 3

    Marker the placement of the electrical leads before removing them.

  4. 4

    Disconnect the electrical leads. [two]

  5. 5

    Remove the vehicle's serpentine chugalug. [3]

  6. vi

    Remove the mounting bolts and familiarize yourself with their placement.

  7. 7

    Pull the alternator out.

  8. viii

    Remove the plastic cover from the dorsum of the unit of measurement by unscrewing it.

  9. 9

    Inspect the bearing. If it does not seem snug, or makes dissonance when it spins, it volition have to exist replaced.

  10. 10

    Supercede the bearing, if necessary, before moving on.

  11. xi

    Disengage the screw which holds the resistors in place.

  12. 12

    Pay conscientious attending to the placement of each wire before disconnecting whatsoever.

  13. 13

    Replace the rectifier past prying out the soldered leads and and then undo the mounting screws.

  14. 14

    Pull the rectifier out.

  15. 15

    Install the new rectifier by replacing the mounting screws. Solder the pb wires to reconnect them.

  16. sixteen

    Reinstall the screw which separates the rectifier from the brush assembly.

  17. 17

    Replace the brushes by first undoing the screws which hold each brush assembly in place. Remove the brushes from their channels.

  18. 18

    Clean the expanse of the armature shaft that the brushes contact.

  19. 19

    Assure that the leap for each new brush is directly at the back, pushing into the brush slot. Install the replacement brushes.

  20. 20

    Remove the voltage regulator by beginning removing the screw from the lesser brush assembly. Remove the spiral that holds the atomic number 82 into the grounding screw.

  21. 21

    Install the replacement voltage regulator by replacing the screws mentioned in the previous step.

  22. 22

    Apply an ohmmeter to assure that the diodes are receiving the proper current.

  23. 23

    Supersede the plastic comprehend as well every bit both of the resistors.

  24. 24

    Put the alternator dorsum in the vehicle.

  25. 25

    Reconnect the electrical leads assuring that yous're installing them properly.

  26. 26

    Replace the serpentine chugalug. [4]

  27. 27

    Reinstall the air cleaner and verify that the belt tension and mounting bolts are right.

  28. 28

    Inspect the estrus shield at the back of the alternator to verify that it is properly installed.

  29. 29

    Reinstall the bombardment leads.

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Add New Question

  • Question

    Where practice I buy the alternator kit for a 1997 BMW?

    Community Answer

    If you know how to rebuild it, look for the rebuild kit in your local auto parts store or go along machine-parts.com. You can purchase a used 1 with warranty for less than what you would pay for a new one or a remanufactured one.

  • Question

    How practice I fix the alternator of a 2004 Honda CRV?

    Community Answer

    You're ameliorate off replacing your alternator instead of fixing information technology.

  • Question

    What if information technology is not charging the battery?

    Community Answer

    Remove ane of the battery terminals, if the car turns off, most likely information technology'southward the alternator. If yous can drive it, go to the mechanic or auto parts shop, they volition about likely check it for costless. The meter should read 14 amps while it'south running, don't let them sell you an alternator and find out later on it was the battery.

  • Question

    What alternator is used in a 1985 Chevy 305, small block?

    Community Answer

    Any GM from 1979 to 1986, equally long as the bolts line upward like yours do. If yous can't find one, try car-parts.com, they ship right to your firm or you can pick it up. Y'all shouldn't have to pay more most $25-35.

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Video

  • When installing a new volt regulator, exist sure to apply thermal grease to the dorsum of the appliance.

  • You may find information technology helpful to take photos, or depict diagrams of, the electrical leads and mounting bolts. It is disquisitional that they are properly reinstalled.

  • Consult the owner's transmission for the specifics about your vehicle's alternator brand.

  • Alternator parts are all fairly cheap at your local motorcar parts store.

  • Be careful not to over torque the postal service, which serves as the principal lead, from the brush ready. This could cause it to break.

  • In some alternators, the rectifier will be constitute pressed into the rear half of the alternator's frame.

  • It may exist helpful to disconnect only 1 wire at a fourth dimension in order to replace them correctly.

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References

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