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How to combat rust in alternator?

N

n9viw

Member
The patient: A NON-SHEDDED '49 Farmall M with Delco 10si 3-wire alt, neg. ground 12v conversion. No shed because I haven't got one... yet.

I've got the alternator apart to replace the internal regulator, which went belly-up due to the PO's bad wiring. There's a lot of rust in there, particularly on the terminals of the regulator, brushes, and resistor; secondarily on the terminals of the rectifier and the diode trio.

WITHOUT getting into a genny/alternator argument, has anyone:

1) had any experience with this?

2) Made a solution for this?

3) not experienced it but has a suggestion for it?

I'm hoping for something more elegant than "fab a sheetmetal cover for it", but I don't know if dielectric grease will hold up under all-weather conditions.

TIA,
Nick
 
After the rebuild and just before slidin' the two halves together, giver 'er a light coat of shellac (inside the business frame housing the stator) from a spray can making sure you stay away from the brush ends and the regulator's terminals.

That’s how they come from the factory anyhoo.

Allan
 
(quoted from post at 17:29:11 09/29/10) After the rebuild and just before slidin' the two halves together, giver 'er a light coat of shellac (inside the business frame housing the stator) from a spray can making sure you stay away from the brush ends and the regulator's terminals.

That’s how they come from the factory anyhoo.

Allan
Click to expand...

Will do, thanks Allan!

Nick
 
To add to Allen's suggestions, FILL the connector body that plugs into the regulator with dielectric silicone grease.
 
Alternators are not made to be exposed to the weather.A cover would make it overheat.My Ford tractor has a sealed generator.
 
I would try and find a Marine Alternator. They are sealed for marine use with a internal regulater. Sealed to prevent corrosin and fire. GM engine"s are used in many inboard,inboard outboard boats. 2.5/3.0 liter iron duke"s I4, 4.3 liter V-6, 5.0 liter 305ci V-8, 5.7 liter 350ci V-8, 7.4 liter 454ci V-8, 8.1 liter 502ci V-8. Most will have a high AMP output for running marine electroinc"s. Look for Boats with Mer-Cruser outdrives.
 
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