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Fan clutch bearing making noise
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I had to replace mine at 114000 miles and yes, it runs all of the time the dash air is on.
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Not sure you misspoke. Mine does cycle while I’m stopped on high idle with the OTR running. It doesn’t come on often, but it does cycle. Maybe coolant temp is what triggers it, but it does run on high speed.
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I notice the retarder equipped coaches the fan clutch has short life span when the retarder is engaged the first speed comes on and after a 7 second delay the second speed comes to life and will repeat the process every time the retarder is engaged it makes no difference what the engine tempature is it will engage
good luck
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This is starting to make good sense.
Newer coaches are cycling the fan a lot more through either the air temperature sensor or retarder being engaged. As you may know, the older coaches cycled primarily on water temperature and the tempertures were quite high. And dash air coaches don’t cycle at all when the dash air is engaged. Dash air activates the high speed setting so nothing else will trigger a cycling.
Newer coach folks might want to add clutch replacement to a 60K-75K routine replacement scedule.
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Recently at Prevost Dallas, a tech mentioned a problem with my fan clutch. He hand spun the fan and pressed down on the flat belt. There was a very minor amount of noise only to be felt in the belt, not heard. With this “diagnosis” a fan clutch replacement was recommended. Part was $1778 and labor at$784. My coach is an 06 H3-45 with 86k miles. I would be interested in whether a new fan clutch would have any “feel” in the belt upon a hand spin.
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Les,
I have my fan out at the moment, when I put it back, I’ll try that trick, but not sure I understand the logic.
For what it’s worth, I couldn’t get the fan blade out without removing the fan assembly even with the carriage laid all the way over and air bag removed.
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Les,
When I got my 97 after 15 years of owning a clutchless fan coach I spun the blades and there was a low growl. No wobble, no indication anything was wrong, just a noise I could detect but nothing that could be felt as a drag or impediment to spinning freely.
I never did anything with the clutch for about 5 or 6 years. I would spin it every time I had a chance to see if it dragged, or wobbled or if the noise was worse. It remained the same. Others would tell me it was bad because their’s made less noise but it worked fine. I changed it when the low speed portion failed to engage.
My point is you can likely get thoousands of miles from your clutch beyond when it starts making noise. At your next rally spin as many other clutches as you can for comparison purposes. And learn the procedure which Gil listed for locking it up.
This is just my opinion.
Jon
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I replaced mine when I started to hear an unusual noise WHILE THE ENGINE WAS IDLING!
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Horton makes a lot better fan clutch IMO than the Kendrion/Linning Prevost sells the last Linning clutch I bought from Prevost lasted 22,000 miles they did make it good but I ask for the refund after a debate I got the refund and purchased a Horton it’s smooth as silk
The Kendroin/Linning clutch will kinda mislead you it says Germany but a close look it will say made in China,Mexico,Brazil and who knows were else I have had good luck from the Horton plus it 100’s of bucks cheaper than Linning at Prevost
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Can you provide the Horton part number, what years will it work in?
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Yes, this is an old thread but likely still of interest – at least to me.
My fan clutch too makes a loose bearing growl and has a bit of wobble to it. Current Prevost replacement assembly (got to buy the whole thing) is around $2,000. Luverbus above indicates that an alternative is a Horton part.
Now the questions: What is the Hrton part #? Has anyone made this swap? Are owners still experiencing early failures (less than 75,000 miles)?
THANKS
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Like mirrors, charge air coolers, and dog bone bushings Prevost has not done the best job of selecting a fan clutch.
I have not heard of a better replacement, or if one is available if it is a direct replacement or requires modifications to the wire connector, mounting points or belt drive, but I do know that I am on my second clutch on this coach at less than 140,000 miles and a similar mileage on the clutch on the previous coach.
Like the poor decision regarding the charge air cooler it would be far better to equip the coaches with the best available rather than subjecting customers to the inconvenience and expense of replacing lousy ones multiple times.
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Next time I need a fan clutch, considering going to electric fans. Haven’t done the research yet.
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