| Author |
Message |
Verell Boaen (Verell)
Member
Username: Verell
Post Number: 990
Registered: 5-2001
| | Posted on Wednesday, July 23, 2003 - 8:29 am: | |
Bill,
The slip rings will probably be chewed up. If the rebuilder says the rotor must be replaced (@~$200 + must come from Germany) because of the slip rings, ask if he can replace the slip rings instead. Most rebuilders don't like to do it, because it involves soldering & time. Also, there's some chance that things will go wrong & the rotor will have to be scrapped anyway.
The replacement slip rings only cost $15-$20, but it's about an hour's labor to unsolder the wires to the old rings, pull them off, press on the new rings, re-solder the wires & turn them in a lathe to ensure runout is within tolerence. Tell him Ace Electric makes the replacement slip rings.
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Bill White (Nc_newbie)
Junior Member
Username: Nc_newbie
Post Number: 146
Registered: 2-2003
| | Posted on Tuesday, July 22, 2003 - 8:07 am: | |
Yes I did previously have a cam seal leaking oil on to the alternator before I replaced the cam seal. I will pull the alternator then and have it rebuilt.
Bill |
Verell Boaen (Verell)
Member
Username: Verell
Post Number: 988
Registered: 5-2001
| | Posted on Tuesday, July 22, 2003 - 7:59 am: | |
The light is controlled by the voltage regulator circuit inside of the alternator.
The symptoms you describe are commonly caused by the alternator brushes failing to make contact with the slip rings.
This can be due to:
- the brushes becoming worn,
- the slip rings being worn,
- problems with the connection between the brushes & the voltage regulator's internal circuitry.
- the regulator's internal circuitry.
BTW, the brushes are built into the voltage regulator which is mounted on the back of the alternator.
If the slip rings are OK, then try replacing the voltage regulator.
BTW, a very common cause of alternator failure is oil dripping down from the front head (usually cam seals or that general area). The oil gets sucked into the alternator & causes the brushes to chew up the slip rings. Easy to spot, the whole inside of the back of the alternator looks like it's been sprayed w/copper paint!!!
So, next step is to pull the alternator & give it a visual inspection. Be very careful removing the voltage regulator or you'll break the brushes.
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Bill White (Nc_newbie)
Junior Member
Username: Nc_newbie
Post Number: 145
Registered: 2-2003
| | Posted on Tuesday, July 22, 2003 - 6:21 am: | |
Need some basic advise... I'm going to go study wiring diagrams now. My alternator light keeps coming on intermittenly ("idoit light with a picture of a battery on it"). In the past it would come on very dim sometimes at idle. Now it is intermittenly coming on brightly at higher RPMs. I put a VOM across the battery when it was on a sure enough it was only 11.7volts so not charging.
How do I verify that the problem is the Altenator and not something else or another component?
Bill |
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