Thread: Defender Alternator Options

I've done it on my home jigged Bosch alternator out of a Magna Verada but I dunno about the Marelli one. Bloody stupid complicated italian rubbish! Splitting those required unsoldering of all the coils if they are anything like the original I had.

http://members.optusnet.com.au/mac.man/alternator_swap/

This shows how I did the W wire. It's a simple AC pickup from ONE of the field coils.

BTW - the W terminal is the source for you're tacho. The others are the main output and the battery sense terminals.

Originally Posted by Craig

Thanks for all the replies guys,

Well its a few months later and I have my new 100 amp model from the Disc and ready to fit it to the Defender
However… the old one has two connections (B+ and D+) and the new one has three connections (B+, D+ and W).

Does anyone know if there is any special way to wire this up?

Thanks


Craig

the extra one is for the tacho

on the old defender one it has a rubber cover over the unused tacho fitting point which is a screw on fitting not a blade (or mine did)

the OEX number for the Disco Tdi 100 amp MM alternator is

MXA 831

hole diam 8.2mm
adj hole to pivot 148mm
foot to foot 80mm
pulley diam 53mm, 7 PV groove.

Originally Posted by rangieman

I have a 100 amp alt of a transit van on my defender if you want a part number let me know and ill post it

That would be useful. Did yours have the extra terminal for the tacho feed?

Originally Posted by jik22

That would be useful. Did yours have the extra terminal for the tacho feed?

Yes it does its the same alt that suits a ford transit van

Sorry for the thread dig, but can someone tell me the part number of a 100 amp alternator that will fit in a 300TDI Defender?

Originally Posted by RhinoH

Sorry for the thread dig, but can someone tell me the part number of a 100 amp alternator that will fit in a 300TDI Defender?

I ordered locally and ask for a 300tdi disco alternator.