Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 01-19-2015, 10:03 PM   #15
Senior Member
jauguston's Avatar
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973

Actually engine speed does vary fan speed in the most common hydraulic driven fans. The pump out put varies with its speed and that relates to varying fan speed.


2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 01-19-2015, 11:51 PM   #16
Senior Member
GA Navigator's Avatar
Join Date: May 2013
Posts: 335
Originally Posted by jauguston View Post

Actually engine speed does vary fan speed in the most common hydraulic driven fans. The pump out put varies with its speed and that relates to varying fan speed.


I don't know if they're all the same, but my old side radiator fan does vary speed up to a point. I guess as the fluid flow increases, so does the fan speed but it seems to hit a max at a certain engine RPM which probably is related to some maximum fluid flow rate or pressure relief valve, etc.
FWIW my coolant temp stays at 180 degrees regardless of conditions. The transmission temp stays at 180 also unless I sit at a red light for a long time then it will increase to about 200. I've also seen the transmission temp rise a little bit when climbing steep hills at slow speed within a state park, etc. I try to speed up enough to get torque converter lock-up in 2nd gear to prevent the temp rise but it's not always possible.
Apparently, the torque converter makes a lot of heat until lock-up.
Sorry if my post rambled on.

1994 Holiday Rambler Navigator
Cummins 8.3
Allison MD3060

1994 Holiday Rambler Navigator
300HP Cummins 8.3
Allison MD 3060
GA Navigator is offline   Reply With Quote
Old 01-20-2015, 09:52 AM   #17
Senior Member
Country Coach Owners Club
Join Date: Jan 2006
Location: Redding
Posts: 3,520
Originally Posted by Ray,IN View Post
I thought all side-radiator chassis have a hydraulic driven(may be a electric too) cooling fan. If that is correct, RPM is immaterial to cooling fan speed. RPM does control water pump speed, which is more important.
You may be absolutely correct, but that does not help the OP.

All I know in our frequent uphill travels in the West Coast mountains these past 13 years from sea level to 7,000 feet in 70 miles, is that with the RPM's below 2000 rpm the water temp rises rapidly and can be reduced by keeping the rpm's above 2000 on my side radiator, Cummins equipped rig similar the OP's.

That was the message I was trying to convey to the OP.

1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote

beaver, heating

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
1996 Beaver Patriot Buying Used Thoughts TrvlnChefTom Class A Motorhome Discussions 20 12-05-2014 06:48 AM
1999 Beaver Patriot Coopers Mom Class A Motorhome Discussions 9 11-21-2014 07:51 PM
New to us 2001 Beaver Patriot Ticonderoga 37 Bill Dean New Rig Show-Off! 22 04-16-2014 03:23 PM
Just purchased a 1993 Beaver Patriot Cantiberos31 Monaco Owner's Forum 9 04-10-2014 09:09 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:02 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.