Alternator removal

Removing the alternator from the vehicle is necessary when a mechanical or electrical malfunction is found that requires repair or replacement of the alternator. By electrical malfunctions, we mean that the alternator is not charging, insufficient or excessive charging voltage. Mechanical malfunctions include faulty bearings or other internal or external damage.

Be careful when removing the alternator because the battery voltage is always present at the alternator output terminals, and a strong spark may occur due to a short circuit to the ground. That’s why the minus terminal from the battery is removed first before removing the alternator. Then disconnect all electrical connections from the alternator.

Loosen the main bearing bolt that secures the alternator to the engine and remove the drive belt tensioning bolts. Moving the alternator toward the engine loosens and separates the drive belt from the pulley. On an alternator without a tension bolt, a lever is used to release the tensioner to loosen and separate the belt from the pulley.

After separating the drive belt, while holding the alternator unscrew the supporting screws all the way and remove the alternator from the engine.