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Old 09-19-2015, 06:36 AM   #1
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Belt Service on an 8kw Onan Generator

I am wondering what the belt life is on a 8kw Onan generator for an 2005 CC Allure 37' with 46,000 miles and 477 hrs on the generator. In addition, how involved is it and cost to replace? Another member on the forum indicated to me that the belt on his 10kw generator failed on his 42' 05 Allure and was a major job to replace as not easily accessible. I am wondering if the same would apply to the 37'? Typical cost to replace?

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Old 09-19-2015, 06:49 AM   #2
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The drive belt/s on an Onan generator are accessible by removing the top of the cabinet and, in some cases, one of the sides. The difficulty is more in how much access you have to the generator. If it is mounted on a slide out tray, it will be more easy than if it is not. If it is bolted to the coach frame, it will have to be disconnected and dropped out from the bottom. That is a big job.

'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
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Old 09-19-2015, 10:03 AM   #3
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Originally Posted by cspieg View Post
I am wondering what the belt life is on a 8kw Onan generator for an 2005 CC Allure 37' with 46,000 miles and 477 hrs on the generator.
My PowerTech 7kw belt failed at about 800 hours and 18 years.
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
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Old 09-19-2015, 10:15 AM   #4
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If the generator is on a slide, not bad to access, just go ahead and have it replaced at the next LOF change service.

If it is not on a slide, which my 04 Allure is not (And maybe the 05 too?), then yep it can be a PITA and expensive process. The shop I worked with back then, had to drop the generator out of the coach to obtain access to the generator. (For other reasons, but had the belt replaced at that time too.) If you do have to drop the generator, go ahead and have more preventative maintenance done at the same time. Flush the radiator, thermostat, temp sensor along with the belt. And personally I recommend either a Gates or Cummins/Onan OEM belt. Most belts are pretty good now days, but due to the costs of dropping the generator, I did drive out to Cummins and picked up an OEM belt. And I also had my coolant changed to Final Charge, at the same time I had to replace a clogged up radiator (poor maintenance by previous owner). I run Final Charge in the ISL engine, so that makes it carrying one coolant for top off's a bit easier!

Best of luck to you!
Roo II is our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
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Old 09-22-2015, 10:36 AM   #5
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I just replaced the belt and hoses on my 8K Onan while I was changing the oil and filters (fuel filter as well). My gen is mounted on a front and center slide and I had to remove the top, side and back panels in order to get access to the front of the engine, as the front of the engine is at the back of the slide tray. I was able to slide underneath the front of my MH and with the gen moved all the way out had plenty of room working on the front of the engine in the space that was created when I slid the gen out. I might mention that the fan belt appeared to be the original belt and was in good condition with just under 1,000 hours on it and being 15 years old.
Tim Sullivan, 2000 Country Coach Magna, C10 Cat with 2015 Toyota Prius toad.
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