Classic cars forum & vehicle restoration.

[jessejazza]

I have been reading my Haynes Automotive Electrical book as I am planning to get my S2 Landrover on the road. She is currently fitted with a 340. To set up the 340 I gather one needs a setting tool which I haven't been able to source. May not need one but I think it is likely.

Would the 106 be a better bet for setting up? The problem with the 106 is that the cap easily breaks - I've two unused and somehow after moving from place to place the cap gets broken. This doesn't happen with the 340.

However, which is the better of the two. Of course there is the option of alternator but I have 6 new dynamos in a box and alternators I find don't last. If one does not have ancillaries needing the extra output an alternator is not necessarily required. Had my Escort off the road for 8 months and as I was testing electrics found the alternator wasn't charging.

Be grateful for opinions and advice.

[ukdave2002]

Both the RB106 and RB340 are control box's; they do more than just regulate the Dynamo voltage.

The RB106 is a "Compensated voltage regulator" the RB340 a "Current voltage regulator" one can be substituted for the other, but it's not a straight swap. One other consideration is that the field resistance built in to the control box is correct for the specific dynamo, otherwise the control will be compromised. If you google Lucas dynamo control box, you should find a compatibility table. If you alter the control box type you may also have to swap the dynamo.

Unless you are happy dealing with vehicle electrics, I'd be inclined to stick with the standard set up.

In theory the RB340 does a marginally better job of charging and looking after the battery, but neither are as good as an alternator
Whilst there is a special tool for adjusting the RB340, a pair of long nose pliers can be used instead, just remember to reverse the direction of the Lucas instructions!

Dave

[jessejazza]

[Phil - Nottingham]

Set up properly the RB106 should be entirely adequate unless you are using more accessories od driving always at night and in winter.

If you are an alternator conversion is the best option but not the cheapest unless its warranted
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