My mate is in the process of rebuilding an old petrol 2A, and in the process is converting it to negative earth.
Its all fairly obvious except for the starter motor. Will this just work as normal if he swaps the earth round, or are +ve earth and -ve earth starters different items? (and therefore will it go bang or go backwards?)
Ta
No changes necessary. The starter will just work without being touched.
There's only 4 things he'll need to change:
Ammeter polarity (swap the wires on the back of it). The polarity of the dash mounted sockets (ie the colour). The ignition coil polarity (swap the wires on it) The generator polarity (have a google) or otherwise this is the ideal time to do an alternator conversion.
No need to swap anything on the starter especially if its an older model, the rotation will be the same as they are not a permanent magnet motor. Same with the old generators except you may need to flash the field coil over by connecting it momenteraly to a batery.
Peter.
Thanks guys. It's getting a rewire and an alternator too so everything else should be covered.
On or around Thu, 02 Dec 2004 09:14:13 +1300, EMB enlightened us thusly:
something that doesn;t apply to this one but I heard of a bit back... very early 2¼ engine blocks have a dynamo mount that won't allow fitting an alternator.
On or around Wed, 1 Dec 2004 20:16:41 -0000, "Peter Seddon" enlightened us thusly:
heater blower motor might go backwards, mind. I've seen both kinds of motor on heaters.
Can you not just change the mount in that case? My landy came with a petrol engine with an alternator conversion. I think most of the brackets on that were lifted off a metro or something along with the alternator.
Would that actually make any difference to the amount of heat produced in the cab? :) We will find out if the heater goes backwards as i'm going to stick it on my 2A, while he's had one of my spare series 3 bulkheads and a series 3 heater.
On or around Thu, 02 Dec 2004 23:01:40 +0000, Tom Woods enlightened us thusly:
Not on this one, it's apparently part of the block. Or so I was told.
LR did offer a part which picked up on the bottom dynamo bracket and a location down by the sump somewhere, to form the lower bracket for the acr series alternator. I converted a series 2 some 10 years ago with one. I thought there was also some issue with a voltage stabiliser for the fuel gauge.
AJH
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.