Thanks for all of Ernies footwork we now have a reliable source for replacement radiator fans on our coaches.
Superior Turbo & injection 3745 Central Detroit Michigan 48210
313-203-3700
P/N ACS449200-21
If you search this number on the WEB nothing comes up. I personally called and verified this number does exist and can be ordered in the future.
Again thank you Ernie for finding a source.
These are not IMO expensive and I would recommend replacement in sets.
I have not seen these in person and this is the extent of my knowledge about them. I only write this to allow someone else down the road an easy way to find them.
At the top of the Foretravel Tech Talk forum there is a "sticky" thread called Part Number Collection. You might wish to duplicate your post over there as a backup location for valuable info.
Foretravel Tech Talk (https://www.foreforums.com/index.php?board=5.0)
After the installation of the 10 blade fan, I drove on a short 100 mile trip. Ambient temp was 70. It took about 45 minutes to get up to 180 degrees. So, I am quite satisfied with the results.
Actually, that would suggest that the thermostat is not completely closing. Should not take 45 minutes at highway speed to get the engine up to operating temperature.