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Re: [Mgs] How many miles should a generator brush set last?

To: 'Simon Matthews' <simon.d.matthews@gmail.com>, 'MG List'
Subject: Re: [Mgs] How many miles should a generator brush set last?
From: Phil Bates <jello@cableone.net>
Date: Tue, 26 Aug 2008 12:33:19 -0700
   I'll  chime  in  with  my  past  experience.   I  ran  through about 4
   generators  in  about  2  years.   There  were several issues.  First,
   rebuilt  units  were  not  as  good  as original.  Second, getting the
   generator  belt  too  tight  is a real issue, as the generator bearing
   surface  isn't  that  great.   Third,  regulators are a common failure
   point  (especially  external regulators - which I think all generators
   and the first couple or 3 years of alternators had).

   As  a  result,  I  ended up eliminating my generator, and replacing it
   with  an  alternator.   Further,  I  fully eliminated the regulator in
   doing so, as the alternator I used is internally regulated.

   I  know  not  everyone wants to make this change, but it really is the
   better system to have - although not original on early cars.

   Phil Bates

   '67MGB with an alternator

   '58 MGA with an alternator
   On Tue Aug 26 21:23 , "Hans Duinhoven" sent:
   
     I would say 50 K miles would be possible.
     Point maybe, that your brushes may not be worn perhaps.
     Dirt inside the brush holders might have caused, that the brush are
     not
     moving  freely  anymore  and by this not making proper contact with
     the rotor
     of the generator.
     Not  charging  also  may  have causes elsewhere like a defective or
     misadjusted
     regulator unit.
     Cheers,
     Hans
     ----- Original Message -----
     From: "Simon Matthews" <simo n.d.matthews@gmail.com>
     To: "MG List" <mgs@autox.te am.net>
     Sent: Tuesday, August 26, 2008 8:07 PM
     Subject: [Mgs] How many miles should a generator brush set last?
     > My car (MGA with original generator/regulator) is clearly not
     >  charging  the  battery,  so  I  need to investigate the charging
     system.
     >
     > It may be dirty contacts in the regulator, or it may be worn out
     >  brushes  in the generator. In order to know which to investigate
     first,
     >  it  would  be  useful  if  I  knew the expected life of a set of
     brushes in
     > a generator.
     >
     > Regards,
     > Simon
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