Checking and replacing generator components [Toyota Camry XV10]

Generator parts

1 – pulley; 2 – front cover; 3 – bearing; 4 – bearing retainer; 5 – bearing; 6 – bearing cover; 7 – retaining ring; 8 – rotor; 9 – rubber insulator; 10 – insulator; 11 – back cover; 12 – insulating plate; 13 – holder; 14 – voltage regulator; 15 – brush holder; 16 – brush holder cover; 17 – rear casing; 18 – bushings; 19 – rear casing.

1. Remove the generator from the engine.

2. Unscrew the three nuts securing the generator rear casing and the contact nut B and remove the rear casing from the generator.

3. Unscrew the 5 screws securing the voltage regulator and brush holder.

4. Remove the voltage regulator with brush holder from the rear of the generator.

5. Using a ruler, check the amount of brush protrusion from the brush holder.

6. Check that the brushes move smoothly and without sticking in the brush holder.

7. Unscrew the screws and remove the diode block from the generator.

8. Place alignment marks on the front and rear generator covers.

9. Unscrew the mounting nut and remove the pulley from the rotor shaft.

10. Unscrew the four nuts securing the front and rear covers. Remove the rear cover from the generator.

11. Remove the lock washer and remove the rotor from the front cover.

12. Using an ohmmeter, check the resistance between the generator contact rings, which should be between 2 and 4 ohms. Check the resistance between the generator contact rings and the generator rotor. The resistance should be equal to infinity.

The original can be viewed on the website: TOYOTAMAN

13. Using an ohmmeter, check the resistance of the stator windings.

14. Check the diodes for proper operation by connecting the ohmmeter probes to the diode, determining the resistance, then swapping the probes and re-determining the diode resistance. In one case, the resistance should be low, and in the other case, it should be infinity.

15. The generator is assembled in the reverse order of disassembly.