Exploded View

Fig 1: Exploded View Of Alternator With Torque Specifications

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Special Tools Required 

• Driver Handle, 15 x 135L 07749-0010000
• Bearing Driver Attachment, 42 x 47 mm 07746-0010300

1. Test the alternator and regulator  before you remove them.
2. Remove the alternator .

   Alternator Disassembly 

3. If the front bearing needs replacing, remove the pulley locknut with a 10 mm wrench (A) and a 22 mm wrench (B). If necessary, use an impact wrench.
   Fig 2: Identifying Wrenches And Locknut Of Alternator

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4. Remove the three flange nuts.
   Fig 3: Identifying Flange Nuts

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5. Remove the end cover (A) and the terminal insulator (B).
   Fig 4: Identifying End Cover And Terminal Insulator

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6. Remove the brush holder assembly (A).
   Fig 5: Identifying Brush Holder Assembly

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7. Remove the four through bolts, then remove the rear housing assembly (A) and the washer (B).
   Fig 6: Identifying Rear Housing Assembly And Washer

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8. If you are not replacing the front bearing, go to step  13. Remove the rotor from the drive-end housing.
   Fig 7: Identifying Drive End Housing

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9. Inspect the rotor shaft for scoring, and inspect the bearing journal surface in the drive-end housing for seizure marks:
   • If the rotor is damaged, replace the rotor assembly.
   • If the rotor is OK, go to step 10.
10. Remove the front bearing retainer.
    Fig 8: Identifying Front Bearing Retainer

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11. Drive out the front bearing with a brass drift and a hammer.
    Fig 9: Driving Out Front Bearing With Brass Drift And Hammer

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12. Install a new front bearing in the drive-end housing with a hammer, the driver handle, 15 x 135L, and the bearing driver attachment, 42 x 47 mm.
    Fig 10: Installing Front Bearing In Drive End Housing Using Hammer

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    Alternator Brush Inspection 

13. Measure the length of both brushes (A) with a vernier caliper (B):
    • If either brush is shorter than the service limit, replace the brush holder assembly.
    • If the brush length is OK, go to step 14.

    Alternator Brush Length 

    Standard (New): 10.5 mm (0.413 in) 

    Service Limit: 1.5 mm (0.059 in) 

    Fig 11: Identifying Brushes In Alternator

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    Rotor Slip Ring Test 

14. Check for continuity between the slip rings (A):
    • If there is continuity, go to step 15.
    • If there is no continuity, replace the rotor assembly.
    Fig 12: Identifying Slip Rings, Rotor And Rotor Shaft

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15. Check for continuity between each slip ring and the rotor (B) and the rotor shaft (C):
    • If there is no continuity, go to step 16.
    • If there is continuity, replace the rotor assembly.

    Alternator Reassembly 

16. If you removed the pulley, put the rotor in the drive-end housing, then torque its locknut to 110 N.m (11.2 kgf.m, 81 lbf.ft).
17. Remove any grease or any oil from the slip rings.
18. Put the rear housing assembly and the drive-end housing/rotor assembly together, tighten the four through bolts.
19. Push the brushes (A) in, then insert a pin or drill bit(B) (about 1.6 mm (1/16 in) diameter) to hold them there.
    Fig 13: Pushing Brushes Inwards

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20. Install the brush holder assembly, and pull out the pin or drill bit.
    Fig 14: Pulling Out Pin Or Drill Bit

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21. Install the end cover.
22. After assembling the alternator, turn the pulley by hand to make sure the rotor turns smoothly and without noise.
23. Install the alternator .