I performed this swap on a 1943 Ford tractor. I'm not familiar with the 68 moss malvern but the basic principles are the same.
Is the 68 moss malvern 6 or 12 V?
.......6 V:Are you going to convert a 6V vehicle to 12V?
....................Yes: Your old wiring can handle about twice the
...........................current needed by 12V replacement parts.
...........................You'll need to replace all lights, motors, etc
...........................except, perhaps, the starter. Some 6V starters work at 12V.
..........................The ignition requires special attention when changing voltage - new coil and all that.
Is there an alternator that bolts up in place of the dynamo?
...........No: You will need to buy or fabricate brackets.
.................You will need to find a belt the right length
Does the pulley on the crankshaft march the pulley on the alternator?
..........(Many new alternators use flat belts. Most dynamos used V belts.
............Replacing the alternator pulley can be a bear and V belt pulleys the
............proper outside and shaft diameter can be quite difficult to find.)
Are you going to use a "one wire" alternator
...........No: Reconsider! One wire alternators are much easier to use.
Do you know the maximum draw of the engine and vehicle?
...........No: Find out! You'll need to know to select proper fusing
.................Remember the 12V system will draw less current than the 6V system.
You'll love the change over to an alternator. Lights won't dim at idle, the ignition will work better, your battery stays charged better in city driving, alternators don't require brush changing, and starting is better in cold and wet weather (it's 32 degrees below wind chill here today and the tractor started!).
Last edited by MEKKMan; 1st January 2008 at 20:39..
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