| Fan Clutch [message #92559] |
Mon, 19 July 2010 10:39  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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I thought I'd start a new thread on this since I hijacked another thread on this earlier. A few weeks ago, on my camping trip, I left Phoenix and my fan clutch cycled normally on my way up into the mountains. It was pushing 110F and as normal, by that time the clutch would gradually stay on full time. When I got to Globe, my coach started to overheat and I realized the fan clutch was no longer on. I was surprised that it failed so suddenly. I nursed it up to Roosevelt Lake and camped for about 10 days. On the way back, I picked up a Hayden "severe duty" 2797 and took off for Phoenix. Luckily most of that run is downhill, but the fan never came on and the coach ran hot (about 210) all the way home. At the same time, my storage neighbor mentioned that his coach runs at that temp all the time and he has never heard his fan clutch come on. I encouraged him to try a new clutch and he bought a Napa 271301. He reported that now it runs between 190 and 200 and the clutch cycles on and off during about a 100F day. So, I decided to try one of those. I quickly discovered that the Napa 271301 is identical to the Hayden 2797--in fact the box even says 2797. I was discouraged, but since I had it, I decided to swap it. Well, lo and behold, it cycles perfectly and seems to duplicate how my original Delco operated. I can only conclude that buying a Hayden is a crap shoot when it comes to calibration. I returned the 2797 I bought in Globe at the local Checker--no questions asked. Interestingly, these models are made in the USA if that makes any difference. I had toyed with ordering a Delco, but suspected I may have wound up with a Hayden anyway. Sorry for the long post, but for now I'm satisfied with what I have, but it sure isn't very comforting for anyone who needs a new clutch. BTW Steve, thanks again for your great writeup on the Western States site.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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