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Old 06-17-2013, 05:05 PM   #1
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Need Info on generator repair---HELP

I ask for help earlier this week with a generator issue and you good folks were great help. I have a 2004 41ft Dutchstar with an Onan 7500 generator that will start and run for 1 to 5 minutes then shut down with a code of 33. Some of the good people here let me know that the sensor may be faulty and need changing.

My question is does the generator need to be completely removed from the rv to make this repair, this is what I was told by the repair shop that I am scheduled to visit tomorrow for repair. This is a total of 2 to 3 hours of labor before they even start to look for the true problem. I don't know what to expect the total repair price to be, so some feed back from someone that has experience with this repair would be great.

I am approximately 35 miles east of Los Angeles so if you have any leads in this area to a repair shop that works on diesel generators please let me know this evening. THANKS
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Old 06-17-2013, 05:42 PM   #2
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Your gen is mounted on a slide out to the front. If it is the temp sensor on the engine it located at the very back side of the gen enclosed box. I will bet I can change it without removing complete gen and causing other problems. While they are in there consider replaceing the belt. Dealers sometime like to go the costly way when they quote you a price but the guy that does the work knows how to do it faster and easier.

Dave
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Old 06-18-2013, 10:47 AM   #3
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I would think only a generator winding issue would require the removal of the whole unit. Did they say which sensor they believe it to be, or are they just guessing?

Peter
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Old 06-18-2013, 01:12 PM   #4
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TEEGEE1997, I had the same code on a Onan 7500 watt diesel. It is in a Itasca 04 Meridian with 520 hours with no slide. Went to the Onan generator repair shop. It had to be removed by unbolting and dropping down. The temperature sensor cost $17. At the time I had them replace the thermostat, belt, and sensor as well as service. It resulted in a $700 bill!!!! This is a poor design and the next MH will have a slide.

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Old 06-18-2013, 11:53 PM   #5
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Thanks folks

We got everything taken care of for less than 300.00. The problem was the belt was completely shredded and needed to be replaced, I also had them also replace them thermostat and the temp probe. The good news is that on my Dutch Star the generator does slide out for easy access for repairs. This allowed me to pay for 2 hour of labor instead of the 4 hours I was quoted before learning the gen could be moved and worked on very easily. Everything work out and I thank you all for your help.
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Old 06-30-2013, 05:14 PM   #6
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I have had same problems with my GenSet. I called Onan and they said before I started throwing parts at it, clean the split rings with a narrow emery file. The split rings(2) are on the area that the contact brushes make contact to armature. I tried it and no more problems. Onan does sell a file tool that you can purchase. The fix can be accomplished removing air cleaner cover and removing plastic cover the exposes the brushes. Its about a 10 minute job.
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