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.
Reply
  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 06-08-2013, 06:32 AM   #1
Senior Member
 
joeplazek's Avatar
 
Join Date: Jul 2011
Location: CAISTOR CENTRE
Posts: 535
Side radiator fans run at all times

I have a 1996 Cummins M11 450E Plus with an Allison HD 4060 Transmission. The concern I have is that the side hydraulic cooling fans run at all times. I have asked a reputable diesel mechanic about this and he told me it was for the intercooler more than the radiators. Just wondering if anyone else has info on this matter? I have read on this forum that other owners have had their fan controllers go bad and their fans would run all the time and drop their fuel mileage 2mpg. If it is for the intercooler so be it and I will leave it alone,,,,


The coach is a 1996 Monaco Signature on a R3500S Roadmaster chassis,,,


joe
__________________

__________________
joeplazek 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 06-08-2013, 06:44 AM   #2
Senior Member
 
BCooke's Avatar
 
Join Date: Aug 2011
Posts: 1,523
My father had problems with the fan kicking on high speed when the temperature was to low. In his case the control was shot and the default is high to protect the engine from over heat.
Some of the hydraulic pumps can draw 70 hp, so yes there is a mpg hit.
__________________

__________________
2017 F350 Lariat Diesel Dually, White, Hitch Kit.
2013 Dutchman Voltage 3200 Epic II 5th wheel.
BCooke is offline   Reply With Quote
Old 06-08-2013, 08:35 AM   #3
Senior Member
 
Country Coach Owners Club
Join Date: Jan 2011
Posts: 929
try the easy fix first. Make sure your electrical connections to the controler are thight. From what I've read on the subject a controler with parts and labor runs about $700. If you're taking a 2 mpg hit (that might be a bit high) fixing it will pay ou back pretty quickly with fuel at $4/gal. The thing I don't like is when you pull into a campground and it is all dusty you fill the air with dust.
__________________
pumper9x9 is offline   Reply With Quote
Old 06-08-2013, 08:36 AM   #4
Member
 
Join Date: Jun 2011
Posts: 38
Investigated my unit and seems the same as yours. The situation appears to be 'built that way' on my unit. There is no conroller on the fan hub, just hyd hoses. There are two heavy electrical wires near the the control box but they are factory capped (dead ends) It is my understanding that temprature sensing fan hyd. conrollers are an option at time of purchase and can be retro fitted, but when not installed the default is to 'run all the time' Hope this helps, Good luck.
__________________
held4ever
DieselOne is offline   Reply With Quote
Old 06-08-2013, 09:02 AM   #5
Senior Member
 
336muffin's Avatar
 
Join Date: Apr 2011
Posts: 2,569
I had the two wires going to the control switch on the hydrolic motor corrode and was not making a connection. Killed my power and my MPG. Cut out the weather-pack connecter and soldered and shrink wrapped the wires, no more problem.
__________________
American Tradition 42R-Cadillac SRX Blue Ox Koni 5050XL MCD Scangauge D Samsung rf197
Fulltime since 2012
336muffin is offline   Reply With Quote
Old 06-08-2013, 09:05 AM   #6
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Are you saying that the side hydraulic fan runs WAO all the time right after starting the engine?

If so, then it's possible that your fan controller has failed.

Dr4Film ----- Richard
__________________
Dr4Film is offline   Reply With Quote
Old 06-08-2013, 11:40 AM   #7
Senior Member
 
joeplazek's Avatar
 
Join Date: Jul 2011
Location: CAISTOR CENTRE
Posts: 535
Quote:
Originally Posted by 336muffin View Post
I had the two wires going to the control switch on the hydrolic motor corrode and was not making a connection. Killed my power and my MPG. Cut out the weather-pack connecter and soldered and shrink wrapped the wires, no more problem.


Was this drop in power and MPG because the intercooler had no air flow?
__________________
joeplazek is offline   Reply With Quote
Old 06-08-2013, 11:42 AM   #8
Senior Member
 
joeplazek's Avatar
 
Join Date: Jul 2011
Location: CAISTOR CENTRE
Posts: 535
Quote:
Originally Posted by Dr4Film View Post
Are you saying that the side hydraulic fan runs WAO all the time right after starting the engine?

If so, then it's possible that your fan controller has failed.

Dr4Film ----- Richard

The fans run wide open at all times. Seems wrong. But I have been told this is the design from Cummins,,,


?? joe
__________________
joeplazek is offline   Reply With Quote
Old 06-08-2013, 11:44 AM   #9
Senior Member
 
joeplazek's Avatar
 
Join Date: Jul 2011
Location: CAISTOR CENTRE
Posts: 535
Quote:
Originally Posted by DieselOne View Post
Investigated my unit and seems the same as yours. The situation appears to be 'built that way' on my unit. There is no conroller on the fan hub, just hyd hoses. There are two heavy electrical wires near the the control box but they are factory capped (dead ends) It is my understanding that temprature sensing fan hyd. conrollers are an option at time of purchase and can be retro fitted, but when not installed the default is to 'run all the time' Hope this helps, Good luck.

What engine and year?
__________________
joeplazek is offline   Reply With Quote
Old 06-08-2013, 07:12 PM   #10
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Nope, it's not normal in any way shape or form.

Your fan controller is shot and needs to be replaced. If you don't have a fan controller then I guess it is WAO all the time.

Dr4Film ----- Richard
__________________
Dr4Film is offline   Reply With Quote
Old 06-09-2013, 07:44 AM   #11
Senior Member
 
joeplazek's Avatar
 
Join Date: Jul 2011
Location: CAISTOR CENTRE
Posts: 535
Quote:
Originally Posted by Dr4Film View Post
Nope, it's not normal in any way shape or form.

Your fan controller is shot and needs to be replaced. If you don't have a fan controller then I guess it is WAO all the time.

Dr4Film ----- Richard
Do you have a guess on the location?
__________________
joeplazek is offline   Reply With Quote
Old 06-09-2013, 08:28 AM   #12
Member
 
brandonklink's Avatar
 
Join Date: Jan 2013
Location: WV
Posts: 84
I have a 2000 500 ISM I just looked and off hydro pump I have two wires that are capped and no wires on fan hub. Does this mean I don't have a fan controller? Where would the controller be located? And does it use the two wires from the pump as control?
__________________
brandonklink is offline   Reply With Quote
Old 06-09-2013, 08:43 AM   #13
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Your best source of information is to call Source Engineering in Oregon and talk to them about fan type, controller and location if in fact there is one on your setup.

Source Engineering Inc.

Dr4Film ----- Richard
__________________
Dr4Film is offline   Reply With Quote
Old 06-09-2013, 11:57 PM   #14
Senior Member
 
chboone's Avatar


 
National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 2,933
Quote:
Originally Posted by joeplazek View Post
I have a 1996 Cummins M11 450E Plus with an Allison HD 4060 Transmission. The concern I have is that the side hydraulic cooling fans run at all times. I have asked a reputable diesel mechanic about this and he told me it was for the intercooler more than the radiators. Just wondering if anyone else has info on this matter? I have read on this forum that other owners have had their fan controllers go bad and their fans would run all the time and drop their fuel mileage 2mpg. If it is for the intercooler so be it and I will leave it alone,,,,


The coach is a 1996 Monaco Signature on a R3500S Roadmaster chassis,,,


joe
Is the coach new to you or has it just start doing it? If you have owned it for a while and just started running on high. You either have a bad connection or a bad controller.

Chuck
__________________

__________________
1999 35 ft. Dolphin 5350,F53 Chassis Chassis build date 1/99, Banks System, 5 Stars Tune, Air Lift Air Bags front & rear, Koni Shocks,Blue OX TruCenter,TigerTrak track bars front & rear, Roadmaster 1-3/4" rear auxiliary sway bar,2004 F450 Lariat 6.0 Diesel Crew Cab DRW with B & W Custom Truck Bed, 1994 36 ft. Avion 5th Wheel
chboone is offline   Reply With Quote
Reply

Tags
radiator



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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:30 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.