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Generators In this forum we will try to answer any of your questions about the different model generators that can be found on Blue Bird coach's.

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  #1  
Old 05-27-2011
markusfmeyer markusfmeyer is offline
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Default Help needed!

About to head out for the weekend in an hour or so. Ran generator yesterday for about 4 hours no problem. Turned it on today at about noon, went to walk the dog at 1, came back at 2, generator not running. Shuts off right away the relay pulls back out. If I hold it it keeps running, but that isn't a fix. The odd thing is though that even with it running, no voltage at all in the coach. Wife isn't going to be happy with a 4 hour ride in these temps and no air running....

Ideas?
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VB 1570
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Old 05-27-2011
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racin41bb racin41bb is offline
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If your cooling fan is not running the generator is probably not producing any AC. Lots of threads on this type of problem. Ours was intemittent connection in harness & a later problem was caused by a bad cannon connector. The PT's may not have those *@#$$
cannon connectors. Don't force the engine to run too long if the fan is not turning (Overheat).
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Old 05-27-2011
markusfmeyer markusfmeyer is offline
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Good point. Fan was running yesterday and earlier today, but just now when trying to restart, holding relay in, it wasn't I don't think. Ralph suggested a slew of things to check but not enough time before liftoff. As long as it won't affect shore power, we can make it through the drive I hope. I was concerned with no power that something else had happened.
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Old 05-27-2011
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Randy Dupree Randy Dupree is offline
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if no power indicated on the gauges when running it is most likely the regulator.
Common problem.
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Old 05-27-2011
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There is an 8amp fuse under the cover on the back of the genset. Poor access & difficult to see. It is just above the regulator on our generator. Worn out slip rings can also cause loss of output.

Markus, If you are headed down I-81 I have a spare regulator which you are welcome to try & send back to me if it doesn't fix the problem.

I think the 86 PTs have the same generator as our 87 FC because ours was the first '87 produced.

This is probably why we have the Kohler 12.5 while most of 87-89's FC's have the 8.0 Onan.

Hope this makes sense--phones, internet, credit card machine, etc. out from 8am to 1pm
due to Cox system problems. Also the building A/C layed down on us.
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Bill & Rita Brinner in Roanoke, VA
"IRON HOUSE"
1987 FC-35SB ('87 factory demo)
Cat 3208ATAAC-300
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"Magic carpet made of steel"
Steve Goodman 1970

"You never fail until you stop trying".
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Old 05-27-2011
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Is the coolant level OK? There is a sensor for that also.
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  #7  
Old 05-28-2011
markusfmeyer markusfmeyer is offline
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All levels are fine. No time to debug, hit the road and dealt with traffic. Four and a half hours to go 160 miles. At campground now with nice ocean breeze. Will debug after get back home. Have two spare regulators so can try that.
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Old 05-30-2011
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Quote:
Originally Posted by markusfmeyer View Post
All levels are fine. No time to debug, hit the road and dealt with traffic. Four and a half hours to go 160 miles. At campground now with nice ocean breeze. Will debug after get back home. Have two spare regulators so can try that.
Markus,

Didn't the regulator change at the Hershey Rally fix the problem ?
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Old 05-31-2011
markusfmeyer markusfmeyer is offline
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I really didn't change the regulator at Hershey. Well, I did, but I also didn't read the instructions ahead of time and like a stubborn man, just swapped it in and it wouldn't run. Found nobody available to help me so I took it out and put the original back in and all was well, so figured I'd deal with it in the spring. Well, now its spring.

What I don't get about the adjustable regulator I bought is that you need to adjust it "down" before starting it, then you dial it up till its where you want it. Hm, if everyone has to dial it down, why not set it that way from the factory? Anyhow...

So I put another known good regulator in that Shane had given me this morning. No change, still won't stay running. Will have to start debugging now as the wife made a comment on the way home to the effect "this problem will be fixed before the next trip, right?".
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Old 05-31-2011
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I have had this happen twice. The first time it was one of the Bosch style relays in the control box. I just replaced all of them while I was at it.

The second time I had to replace the slip rings and brushes.

If you get to that point (slip rings) there is a good article that was referenced here that helped a lot. The article has part numbers, pictures,etc.
http://www.ryanwright.com/wanderlodge/sliprings/


It is not a pleasant job but once done gives you some peace of mind. It might be easier on a PT than on the FC.
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