Voltage Regulator

[63monte]

Help!
Does anyone have a wiring diagram to show how to connect up an Lucas RB310 voltage regulator to a 1962 charging system. The original Lucas 106s had 8 connections (ok 7 if you discount the Earth) whereas the RB310 has only 4 terminals, 2 of which are a twin.

[Peter Laidler]

I don't even pretend to know the answer but have looked in the (very basic) section in the workshop manual - as I suspect you have too.

What I can't get my hear around is why u you are wanting to fit an old 50's era regulator to a '62 car.

[iain1967s]

Lucas standard terminal labelling is

B = output to battery and fusebox
F = dynamo field coil
D = input from dynamo

Service info here
https://www.lrsoc.com/forum/forum_files ... 0Boxes.pdf

Theory of operation here - p26
https://www.traction-owners.co.uk/wp-co ... ontrol.pdf

[ But do yourself a favour and just fit a modern solid-state ADR or similar instead ]

[63monte]

You’re right Peter, I have looked in the usual manuals, not much on line either.
Simple reason for wanting to use it, it was on the build sheet for my car’s ‘63 Monte, Abingdon fitted them to quite a few of the works cars, I was hoping that someone with a works car of that era had one in their car. Might be a question of trial and error if no one can help.
The car’s last incarnation when I last had it on the road in the 80’s had an Alternator. I have reverted back to the works dynamo with tacho drive, for the chronometric rev counter which I have fortunately had stashed away for 40 odd years.

[63monte]

Thanks Iain, I’ve seen those but am struggling to get my tiny brain, which does not seem to work very well any more, around the relationship with the additional wiring in the Mini loom and which terminals each wire links to.
As far as new fangled, solid state is concerned ….. it ain’t going to happen

[iain1967s]

Found this reference online for the Sebring Sprite:

John Sprinzel had included the wiring steps necessary to convert from the 5 terminal RB106/2 control box to the 3 terminal RB310 control box in Chapter 5 of “Modified Motoring”.

I don’t have that book, but it should be pretty simple to match up. Lucas automotive wiring has the benefit of being very consistent across models for the post-war years thanks to ‘British Standard AU7’.

Mini mk1 factory wiring harness has A [brown] and A1 [brown/blue] for the regulator outputs.
Connect both those to B on the 3-pin regulator.

The rest connect to the same letter. i.e.
D = brown/yellow input from dynamo
F = brown/green field to dynamo
E = Earth is via mounting screw to car body

In terms of solid state, you can get any original Lucas regulator re-worked to have solid state on the inside and look identical on the outside. That’s what I did for my mk1 S because of reliability issues with the electro-mechanical workings. But I know that isn’t for everyone.

ps. Fantastic Lucas training docs here:
https://mgaguru.com/mgtech/books/lts_otcc.htm

[63monte]

Good info Iain, thanks for your research, it’s obviously been a quiet day in Massachusetts I will give it a try tomorrow whilst I continue my attempt at re-wiring the works dash