alternator rebuild

Post by **Ruggers** » Tue Oct 21, 2003 7:07 pm

my alt siezed up on me today. i was wondering if any has pulled one apart. i tought about giving it a ago as today is geelong cup and nothing is open. im pretty sure its a bearing as the vac pump still works. or has anybody got one for sale.

Post by **V8Patrol** » Tue Oct 21, 2003 8:42 pm

Ruggers wrote:my alt siezed up on me today. i was wondering if any has pulled one apart. i tought about giving it a ago as today is geelong cup and nothing is open. im pretty sure its a bearing as the vac pump still works. or has anybody got one for sale.

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Post by **Ruggers** » Tue Oct 21, 2003 8:46 pm

on my alternator there is a vacum pump at the rear of it which provides vacum for brakes and clutch boosteres. this has an oil feed which i thought might have dried up but it hasnt and i pulled the vac pump off and it still spun the alternator stll didnt spin.

Post by **DAZZ** » Tue Oct 21, 2003 8:46 pm

Not much to them. If it comes apart OK. Sometimes if a bearing seizes the outer race can spin in the housing, stuffing it.
If it comes apart ok check to see if the rotor has been hitting the stator (poleing) or if these haven't come apart. What vehicle is it off??

Post by **Ruggers** » Tue Oct 21, 2003 8:53 pm

well it wont turn so if it hasnt siezed then its locked up. it was fine then went to restart and it was locked up

Post by **Kev80** » Wed Oct 22, 2003 6:55 pm

Easy, just rip er apart & replace the two $5 bearings & the brushers while your there & off you go. (not much else could be wrong with it)

Post by **dumbdunce** » Wed Oct 22, 2003 9:51 pm

except if it's a nippon denso he might spend a lot of time looking for a second bearing, they only have one in the front.

not much to them, anyway. you need a soldering iron to change the brushes.

Post by **robbie** » Wed Oct 22, 2003 10:04 pm

dumbdunce, I read somewhere that there are some brushes that you buy that just bolt in or something like that.. cant remember, would that be true?

apparantly they are already soldered to whatever they are soldered too, and you just bolt it in.. never rebuilt one, just read about it

Post by **dumbdunce** » Wed Oct 22, 2003 10:25 pm

yeah that's true for some models - some externally regulated alternators use a brush carrier that is held into the back of the alt body with 2 screws. some internal electronically regulated alternators (bosch, lucas) have the brushes installed in the regulator 'black box' which also is held into the back of the alternator with 2 screws. you can buy a new regulator assembly with brushes installed for about $40 - $50, but the brushes are only about $5/pair, and the soldering only takes 20 seconds plus the time it takes the soldering iron to warm up :) the later nippon denso electronically regulated alternators have a cute little brush carrier buried deep inside the guts, could probably get a brush carrier assembly with brushes for not heaps.

Post by **Ruggers** » Thu Oct 23, 2003 6:56 pm

got it fixed today it was a coplased bearing. cost 100 all up and that was a full reco of the alt

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