RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
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 11-01-2006, 03:57 AM   #1
Senior Member
 
Join Date: Jan 2005
Location: Destin, Fl
Posts: 568
While at Cummins South in Atlanta having my Onan fixed, J.J. Yelley's(sp) 2006 Essex, Nascar # 18 driver, coach was there to get a broken fan and turbo pipe replaced. Also I noticed that they were replacing the twin belt setup with the single unit. I thought this was just a recall on 2007 ISM's. Is it also on 2004, 05 & 06's?

Also, his golf cart was there and has a souped up two cylinder Honda engine in it that goes 55mph. SPEED...

John, 2005 4502 Essex
__________________

__________________
John,
2015 LADP, Destin, Fl
2010 Buick Enclave, SMI AFOne
racer0624 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 11-01-2006, 03:57 AM   #2
Senior Member
 
Join Date: Jan 2005
Location: Destin, Fl
Posts: 568
While at Cummins South in Atlanta having my Onan fixed, J.J. Yelley's(sp) 2006 Essex, Nascar # 18 driver, coach was there to get a broken fan and turbo pipe replaced. Also I noticed that they were replacing the twin belt setup with the single unit. I thought this was just a recall on 2007 ISM's. Is it also on 2004, 05 & 06's?

Also, his golf cart was there and has a souped up two cylinder Honda engine in it that goes 55mph. SPEED...

John, 2005 4502 Essex
__________________

__________________
John,
2015 LADP, Destin, Fl
2010 Buick Enclave, SMI AFOne
racer0624 is offline   Reply With Quote
Old 11-01-2006, 04:13 AM   #3
Senior Member
 
Lug_Nut's Avatar


 
Join Date: May 2005
Location: British Columbia
Posts: 3,831
John, That seems to be the new replacement. It is similar to a supercharger belt. One of the heaviest wear in my opinion is when your Jake is engaged in high at speed. The ECM automatically calls in the full fan load at some speeds. This causes a sudden shock load and load demand on the belts. I had Spartan disable this feature as did Rebelsbeach. We feel the belt life is far more important than the slightly more braking aspect of this engaging.
__________________
Peter - Doctor of Mixology
KADB 2013
Lug_Nut is offline   Reply With Quote
Old 11-01-2006, 03:55 PM   #4
Administrator Emeritus
 
rebelsbeach's Avatar


 
Join Date: Dec 2003
Location: Virginia Beach, VA
Posts: 10,033
Bill Thomas at Coach Care Cummins South is AWESOME!!
__________________
2019 Grand Design Solitude 380FL fifth wheel
2017 40' Renegade Verona LE LTS (traded)
2018 F150 King Ranch Crew Cab Diesel
rebelsbeach is offline   Reply With Quote
Old 11-02-2006, 04:13 AM   #5
Senior Member
 
footdoc's Avatar
 
Join Date: Jul 2006
Location: Mobile, Alabama
Posts: 1,002
I have not seen the ISM engine, but isnt the fan controlled by hydraulics and not a belt. On my I side radiator ISL I think it is...the belt runs AC and accessories I believe
__________________
2006 Mountain Aire 43 and 05 Honda Pilot
Air Force One..Real Whirlpool Fridge !
3 sugar gliders, long hair daschund and short hair wife for security
footdoc is offline   Reply With Quote
Old 11-02-2006, 04:26 AM   #6
Senior Member
 
Ecker's Avatar
 
Join Date: Feb 2004
Location: South Carolina
Posts: 770
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by footdoc:
I have not seen the ISM engine, but isnt the fan controlled by hydraulics and not a belt. On my I side radiator ISL I think it is...the belt runs AC and accessories I believe </div></BLOCKQUOTE>

No they are very different cooling methods and it uses a complex belt driven clutch which in turn passes power through drive shaft and gear box arrangement to drive the fans.
__________________
Ecker
Ecker is offline   Reply With Quote
Old 11-02-2006, 04:32 AM   #7
Senior Member
 
footdoc's Avatar
 
Join Date: Jul 2006
Location: Mobile, Alabama
Posts: 1,002
Uh OH....complex as in COMPLE$$$ ?
__________________
2006 Mountain Aire 43 and 05 Honda Pilot
Air Force One..Real Whirlpool Fridge !
3 sugar gliders, long hair daschund and short hair wife for security
footdoc is offline   Reply With Quote
Old 11-02-2006, 04:34 AM   #8
Senior Member
 
Lug_Nut's Avatar


 
Join Date: May 2005
Location: British Columbia
Posts: 3,831
Larry, Cummins uses hydraulic fans up to 400 HP. Both the ISM and the ISX use mechanical drive as the hydraulic system would have to be so large and may cause another issue of cooling the oil.
The mechanical drive used employs an electro magnetic slip clutch which also can electrically lock up one to one.

Here is how it works.

A series of electo magnets are within the clutch. As the hub rotates the field of magnetic energy causes the fan side to rotate at a much slower speed. As heat climbs the voltage increases causing the field of energy to increase which speeds up the fan slowly reducing the slippage. At 205 degrees F. the electic clutch slams in and direct drive sends the fan to top speed. This can take nearly 80 HP at top output and RPM. There are actually 5 functions that are measured and can engage the full fan drive power including intake temperature. One of the five includes engaging in Hi Jake for additional drag (I had mine de-programmed for this feature as did Bob Gregory).
I wish we could have hydraulic too but with this HP it is apparently not really practical.
__________________
Peter - Doctor of Mixology
KADB 2013
Lug_Nut is offline   Reply With Quote
Old 11-02-2006, 04:39 AM   #9
Senior Member
 
footdoc's Avatar
 
Join Date: Jul 2006
Location: Mobile, Alabama
Posts: 1,002
wow...clever engineering that is ALMOST perfect!! Thanks for the info
__________________
2006 Mountain Aire 43 and 05 Honda Pilot
Air Force One..Real Whirlpool Fridge !
3 sugar gliders, long hair daschund and short hair wife for security
footdoc is offline   Reply With Quote
Old 11-02-2006, 06:00 AM   #10
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 29,863
Link to Spartan chassis forum.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 11-03-2006, 06:20 AM   #11
Senior Member
 
Join Date: Jan 2005
Location: Destin, Fl
Posts: 568
Lug-nut.
Great explaination on the clutch workings. According to Trip Tec mine engages at 203 instead of 205. Big woop. My out-of-spec clutch, which was replaced in Nappanee last summer, emited a "squeal" sound much like a slipping fan belt. It did this both at 205 degrees and hi-Jake when extra braking was needed.

I haven't had any belt trouble in 20,000 miles but will talk to Carl about a change when I'm there in Jan. or Feb. Maybe I'm borrowing trouble.

John, 2005 4502 Essex
__________________
John,
2015 LADP, Destin, Fl
2010 Buick Enclave, SMI AFOne
racer0624 is offline   Reply With Quote
Old 11-03-2006, 06:30 AM   #12
Senior Member
 
Lug_Nut's Avatar


 
Join Date: May 2005
Location: British Columbia
Posts: 3,831
John the squeal is acceptable as the clutch faces are both metalic surface. The '05 is not as critical as the '07. If you look at up to '06 at the rad grill and compare it to the '07, you will see the later is much taller. This is due to emmissions changes with the '07 requiring a little more cooling.
John, I may have met you at Outdoor Resorts in Hilton Head over a year ago. I had a DSDP and spoke with you and you showed me the inside of your coach. You had the antique white like glazed finish. Would that be you?

Peter
__________________
Peter - Doctor of Mixology
KADB 2013
Lug_Nut is offline   Reply With Quote
Old 11-03-2006, 12:58 PM   #13
Senior Member
 
Join Date: Jan 2005
Location: Destin, Fl
Posts: 568
Peter,

When Randy checked the clutch he said, the gist anyway, that the mateing surfaces were too far apart(measured in thousandth's) and caused the squeal as the metal surfaces weren't making hard, solid contact.

Wasn't me Peter as we've not been to Hilton Head in this coach. We do have the antique white looking cabinet finish.

You met and spent some time in Nappanee with friends of ours- John & Pam Hassell. Their house is about 3 miles from our RV park. We always have an empty lot with full hookup 50amp available if you're ever in the area.

John, 2005 4502 Essex, back in Fl
__________________
John,
2015 LADP, Destin, Fl
2010 Buick Enclave, SMI AFOne
racer0624 is offline   Reply With Quote
Old 11-03-2006, 02:11 PM   #14
Senior Member
 
Ecker's Avatar
 
Join Date: Feb 2004
Location: South Carolina
Posts: 770
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Lug_Nut:
If you look at up to '06 at the rad grill and compare it to the '07, you will see the later is much taller. This is due to emmissions changes with the '07 requiring a little more cooling.
Peter </div></BLOCKQUOTE>

The engines are still 06 not 07 so what is this emmission change that requires a larger radiator?

BTW _EPA has issued a statement that for regulation of ULSD the engine configuration will apply not what a company calls its year. This was addresseed specifically to labels that are required in cab for ULSD.
__________________

__________________
Ecker
Ecker is offline   Reply With Quote
Reply



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
ISM 500hp EGR Valve Replacement OldHiker Cummins Engines 15 10-26-2009 02:38 PM
500hp ISM won't start.....sometimes racer0624 Cummins Engines 3 11-20-2008 12:26 PM
ISM Fan Belt revisited tm2go Newmar Owner's Forum 3 07-06-2007 07:24 AM
ISM Fan Belt Problem motorhomeguy Spartan Motorhome Chassis Forum 5 05-12-2007 06:36 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:57 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×