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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #391  
Old 02-24-2013
Randy Dupree's Avatar
Randy Dupree Randy Dupree is online now
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Cool,that fixed that!
Now,lets fix that caps key on your key board!
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  #392  
Old 02-24-2013
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Jeff,
You are very welcome...
Please do tell us your story, I'm sure a lot of us would like to hear it...
Good Luck
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  #393  
Old 05-07-2013
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Question PACS 1500 fuse?

Hi Randy--

Tracing out my old inverter's 12V wiring can't find a fuse. I expected to find one in the Neg batt cable near the batteries, but all I see in the entire compartment are breakers, solenoids, and shunts. Is it true--there was originally no "catastrophe" fuse for the inverter?!

Thanks.

--Ned
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  #394  
Old 05-08-2013
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No Fuse that I am aware of in our bird.
I added with a new install.
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  #395  
Old 04-06-2014
jim11dd jim11dd is offline
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Exclamation Kohler 12.5 gen down and out.

I'm trying to locate the voltage regulator for a Kohler 12.5 generator on my 86 pt40. Also any ideas on the location of the over temp or low oil pressure auto shut down switches for this generator. Leaving Jonesboro ga on Wednesday (April 9th) morning for Dallas tx and wanted to try and get my generator up and running so I can have some a/c for the trip. Thanks for any help!
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  #396  
Old 04-06-2014
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Quote:
Originally Posted by jim11dd View Post
I'm trying to locate the voltage regulator for a Kohler 12.5 generator on my 86 pt40. Also any ideas on the location of the over temp or low oil pressure auto shut down switches for this generator. Leaving Jonesboro ga on Wednesday (April 9th) morning for Dallas tx and wanted to try and get my generator up and running so I can have some a/c for the trip. Thanks for any help!
The regulator is behind the louvered cover on the rear of the generator.
If the gennie runs,take a look at your AC Volt meters to see if they show AC power,if they don't,it could be the regulator.
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  #397  
Old 04-06-2014
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On my Kohler/Perkins the over temp sensor is on the top rear of the head. The low oil pressure sensor is on the left side of the engine below the injection pump, right by the oil pressure sender.
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  #398  
Old 04-06-2014
jim11dd jim11dd is offline
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Thanks Randy, the genny will run for approx 30 seconds and then it shuts down. You can keep it running by holding the switch, however once you start it you can't shut it down with switch.
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  #399  
Old 04-06-2014
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Quote:
Originally Posted by jim11dd View Post
Thanks Randy, the genny will run for approx 30 seconds and then it shuts down. You can keep it running by holding the switch, however once you start it you can't shut it down with switch.
In my Perkins/kohler control box there is a relay called the CR relay. It is a three poll double throw clear plastic relay. When there is AC voltage generated it picks this relay. One of the sets of points enables the stop switch circuit. So if the CR relay does not pick (bad relay or no AC) the stop switch will not work.

The stop switch grounds the same circuit that the over temp and low oil pressure switch ground, so if the stop switch doesn't work it is likely the CR relay did not pick and the over temp and low oil pressure switch can't cause the shutdown.

You stated that the fan runs, so there is AC being generated. Is it possible the CR relay has failed or the wiring is loose or broken. The voltage regulators are very expensive, and not returnable

30 seconds is a long time for the engine to run with no AC present, normally it will quit as soon as the start switch is released. I would look at the CR relay points to see if they are burned and not working consistently. I had an issue with burned points on the CR relay and did some magic with a bosch relay to compensate.

Another set of points in the CR relay supply 12 volts to the B terminal of the voltage regulator. This gives the generator voltage to start generating power. Once it is generating power and the CR relay picks, the 12 volts is routed to the switch light. So if the switch light doesn't come on, the relay either failed or did not get AC to pick it.

I know this is complicated,, and I have moments of lucid thinking so I can sometimes figure this stuff out, but it passes quickly.
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  #400  
Old 04-06-2014
Kubla Kubla is offline
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my regulator was in a box beside the generator, your generator is doing exactly what mine did with a bad regulator
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