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Author Topic: voltage regulator  (Read 1141 times)
Denny
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« on: August 08, 2010, 03:05:23 PM »

My Delco-Remy 9000551 regulator is starting to act up. It jumps up and down 14v to 14.5+.  I used to just turn off the enging and restart it and it would go back to normal, but now starting and stopping does not seem to help.  I need to know if anyone out there has a source for either and new(ha ha) or a rebuilt one.  My bus is a 58 4104.

Denny
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gus
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« Reply #1 on: August 08, 2010, 04:33:58 PM »

Denny,

If you're talking about the huge, heavy original, I have the one I took out of my '54. I have no idea if it works but you are welcome to it if you pay shipping costs. It is sitting in my shop somewhere, I just have to find it!!

My bus was long ago converted to a regular truck alternator and the old reg was just taking up space in my rear elect panel.

If it were mine I wouldn't worry about that much minor fluctuation. However, it could also be a sign of worse things to come!

I think it is pretty simple and may be no more than a burned connector, those things are sturdy and built like they belong in a tank. My guess is that if you remove the cover you will be able to see the problem.
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PD4107-152
PD4104-1274
Ash Flat, AR
pvcces
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« Reply #2 on: August 08, 2010, 09:03:36 PM »

Denny, that regulator or a replacement is available for that number. You can probably scare one up from the bus suppliers, like Luke at US Coach.

Also, it is repairable. We had a bad one and I only had to order the power transistor and solder it in. It works fine.

Good luck.

Tom Caffrey
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Tom Caffrey PD4106-2576
Suncatcher
Ketchikan, Alaska
TomC
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« Reply #3 on: August 08, 2010, 09:20:26 PM »

I replaced my transistorized huge black box regulator with a digital regulator that is about the size of a pack of cigarettes.  It has much better voltage regulation. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
Melbo
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« Reply #4 on: August 08, 2010, 10:07:40 PM »

I replaced my regulator with a new one and set it up for my Isolator and it works MUCH better than the original in spite of the regulator between the house and coach start batteries

Melbo
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If it won't go FORCE it ---- if it breaks it needed to be replaced anyway
Albuquerque, NM   MC8 L10 Cummins ZF
Denny
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« Reply #5 on: August 09, 2010, 03:47:41 AM »

Tom C - I know you are a So. Cal guy so do you know of a shop that could  put a more modern one in.  I take my mechanical things to Delaney&Ahlf in Bakersfield but I don't think they like to work on electrical things.  I am also going to call Luke today.  We are just returning from a 3 month trip to Newfoundland, 8500 miles so far and we still have 1600 to get home.  It seams to be running OK but it is not normal and I want to get it fixed.

Thanks for your help, and any other suggestions are welcome
Denny
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Denny
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« Reply #6 on: August 10, 2010, 04:05:53 AM »

I called Luke and he has the parts to rebuild my old regulator.  $116 plus shipping.  Luke is truly a great resource for guys like us that are driving 50 year old rigs.

Thanks to Luke and all of you that helped.  This board is great.

Denny
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