I did a "full" maintenance on mine last year, at almost 1100 hours. All the filters and fluids were changed, including coolant, but the drive belt still looked like new and so did the hoses. I decided to leave them alone. I didn't change the radiator cap either.
The drive belt was a pain to even get an eyeball on - it is at the very back of the 7500 and you have to remove all the covers to get anywhere near it. Unless the generator slide comes really far out, you probably cannot do it without removing the genset either.
Maybe I'll regret not changing the belts and hoses some day, but for now I am happy. And I've put another 12 months and 90 hours on the genset since then too.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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