Question 1

How to remove and install the alternator on 2002 through 2006 Toyota Avalon?

Accepted Answer

To remove the alternator, first detach the cable from the negative terminal of the battery, then remove the drivebelt. Next, detach the electrical connectors from the alternator and the electrical harness that goes over it. Remove the two bolts securing the alternator, and for V6 models, loosen the alternator adjustment bolt to take off the drivebelt before removing the two alternator mounting bolts. If replacing the alternator, take the old unit when purchasing a new or rebuilt one, ensuring it is identical in terms of terminal number, size, and location, as well as matching identification markings. Many new or rebuilt alternators may not come with a pulley, so check the shop's policy on switching pulleys from the old unit. Installation follows the reverse order of removal, and after installation, adjust the drivebelt tension and check the charging voltage to ensure the alternator operates correctly.

Question 2

How to disassembly, component checks, and reassembly of the alternator on 1996 through 2002 Toyota 4Runner?

Accepted Answer

To disassemble the alternator, first remove it and place it on a clean workbench. Next, take off the rear cover nuts, the nut, and terminal insulator, followed by the rear cover. Remove the mounting screws for the voltage regulator and brush holder, then take out the brush holder and regulator from the rear end frame. If only the regulator is being replaced, install the new unit and reassemble the alternator. If replacing the brushes, measure the exposed length of each brush and compare it to the minimum length; if either is below the specified minimum, replace the brushes and brush holder assembly, ensuring each brush moves smoothly. Remove the rectifier assembly by taking out the mounting screws, then remove the rubber insulators and seal plate. Mark the front and rear end frame housings for reassembly, then remove the nut retaining the pulley to the rotor shaft and take off the pulley. Separate the rear end frame assembly from the front end frame by removing the four nuts, then take out the thrust washer and rotor. For component checks, ensure continuity between the rotor slip rings and check for grounds; there should be no continuity between the rotor and either slip ring. Check for opens between each end terminal of the stator windings, and if any reading is high, the stator is defective. For the positive rectifier assembly, check continuity with an ohmmeter, ensuring continuity one way and none when the probes are reversed; repeat for the negative diode assembly. For reassembly, install components in reverse order, ensuring to depress each brush with a small screwdriver to clear the shaft during brush holder installation, followed by securing the voltage regulator and brush holder screws, the rear cover, terminal insulator, and finally reinstalling the alternator.

Question 3

How to disassemble and reassemble the alternator on 1993 and later Toyota Land Cruiser?

Accepted Answer

1980 through 1987 models have an integral voltage regulator mounted on the side of the alternator body, accessible with the alternator in the vehicle. 1988 through 1992 models have a true internal regulator attached to the rectifier assembly within the alternator body. 1993 and later models have an integral voltage regulator and brush assembly accessible by removing the rear cover from the back of the alternator. The alternator must be removed from the vehicle first. This procedure covers only the 1993 and later models. The alternators are basically the same but differ in voltage regulator designs. To disassemble, remove the alternator and place it on a clean workbench. Remove the rear cover nuts, nut and terminal insulator, and the rear cover. Remove the five voltage regulator and brush holder mounting screws. Remove the brush holder and regulator from the rear end frame. If only replacing the regulator, proceed to install the new unit, reassemble the alternator, and install it on the engine. If replacing the brushes, measure the exposed length of each brush and compare it to the minimum length. If necessary, replace the brushes and brush holder assembly. Make sure each brush moves smoothly in the brush holder. Remove the rectifier assembly by removing the mounting screws, rubber insulators, and seal plate. Scribe or paint marks on the front and rear end frame housings for reassembly. Remove the nut retaining the pulley to the rotor shaft and remove the pulley. Remove the four nuts retaining the front and rear end frames together, then separate the rear end frame assembly from the front end frame. Remove the thrust washer and remove the rotor from the front end frame. For component checks, check for an open between the two slip rings and for grounds between each slip ring and the rotor. Check for opens between each end terminal of the stator windings and for a grounded stator winding between each stator terminal and the frame. Check the positive and negative rectifiers by checking continuity and polarity. If any components fail the tests, they are defective. To reassemble, install the components in the reverse order of removal, ensuring the brush holder is depressed to clear the shaft. Tighten all nuts and screws securely. Finally, install the alternator.

Genuine Toyota Alternator

401 Alternators found

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly

Toyota Alternator Assembly

Toyota Generator Alternator

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly W/Regulator

Toyota Alternator Assembly W/Regulator

About Toyota Alternator

Toyota Alternator Parts Questions & Experts Answers

Related Toyota Parts

Browse by Model