IF (and it's a bif 'if') the 81B and the 85 LEB refer to the year of
manufacture then the later the year the higher the output if they are MGB
alts. It is a combination of things that result in the max current that can
be drawn, there is no current regulator as such. The Workshop Manual
describes a method of testing the maximum current, by disabling the voltage
regulator and putting a very high-wattage variable resistor and ammeter on
the output and reducing the resistance. The current should increase then
stabilise at the max rated output of the alt. Gotta be brave, though...
----- Original Message -----
From: "Phil Cleobury" <mgsoftt@yahoo.com>
To: "MG car club" <mgs@autox.team.net>
Sent: Wednesday, January 16, 2002 1:50 AM
Subject: Lucus altenator
> I have three alternators...lucky me!
>
> One, 5 terminal dont know number!
> Two, part number LRA 23802 28 81B
> Three, part number LRA101 37 85 LEB
>
> I know alternators have different otput AMPs and was
> wondering which one would be the best to refurbish and
> fit i.e. if it had a higher output AMPS.
>
> Without being able to decifer the part numbers... I
> cant do this!
>
> If one is higher output, what makes this (rectifier,
> winding etc etc and can I use the others to rebuild
> one more powerful with my best parts.
///
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