Re: 6 Volt Regulator Questions

Posted by Jim McDermaid On 2012/11/14 10:40:24

I would be interested in pursuing the original part (I like originality); I should make contact off line?

I am going to check the brushes in the generator sometime soon, are they hard to come by?

According to the service manual the Generator is Delco-Remy 1102778.

The Regulator is (should be) 1118829.

All rated at 45 Amps (6 Volt).

I didn't actually crawl under the hood but so far the part numbers have all matched the service manual numbers perfectly. The electrical is all Delco-Remy stuff.

No possible way the existing regulator could carry 45 Amps through the little single contact even though the voltage stayed up with all the accessories running.

The original regulators employed some temperature compensation which boosted the charge rate in cold weather which I know this replijunk regulator doesn't provide.

I have the eBay item coming so I will know how this all works out soon.

I have a pile of stud mount diodes that are rated at 150 Amps with a 600 volt peak reverse. I have both the anode to stud and cathode to stud version. I figured I could remove the old cutout relay and put the best diode in its place and mount it so I get some heat sink value through the base of the regulator. The Armature voltage comes to the cutout through the relay frame and goes out to the battery terminal through the contact so mechanically this should be easy to adapt and still put the cover back on. This would preserve the voltage and current relays. I don't know if the current relay can get the generator up to 45 Amps but the contacts look OK. I would expect the diode to have about 0.7 volts saturation drop.

Here in Phoenix AZ it can easily get up to 120 degrees F ambient outside, and under the hood it will be considerably hotter than that. These diodes can run at 392 degrees F so they may survive.

Diodes usually fail shorted which should not cause more trouble than a dead battery.

Jim