Simon,
One set in my TD lasted 25M miles or so, the second about 35M.
Easy to check the things, though, so do that first. What you are
looking for is clearance between the spring and the guide of the brush.
If the spring is touching the guide, the brush is worn down to the point
that it's not getting good contact.
The procedure for adjusting the regulator seems intimidating, but it
works just as described in the workshop manual.
Bob
On Tue, 26 Aug 2008 11:07:52 -0700 "Simon Matthews"
<simon.d.matthews@gmail.com> writes:
> 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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