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Old 10-25-2020, 10:58 AM   #1
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Cooling Fan Breaks

The cooling fan on my 2009 Newmar on a Spartan chassis is hitting the shroud. The end of each blade has a piece broken the extends down about two inches.
I've posted this issue before and thought it was resolved but to my disappointment it has reoccurred. I replaced the fan and motor mounts in March of this year and after about 3000 miles this summer found the same issue. I will consider the Source Engineering fan but the cause of this problem still haunts me. I've contacted Spartan parts to make sure i'm installing correct fan (this is 3rd fan replacement in 5 years) i've talked to Spartan technicians and there is no recall and they have no other complaints about this. The fan clutch has no play as to indicate bearing issues. There is only about one half inch clearance between fan blades and shroud at the top of the shroud. Thanks in advance for any suggestions.
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Old 10-25-2020, 11:08 AM   #2
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I once had a problem with my engine torquing up due to heavy load put on the engine (read drag racing here) so much so that I ended up chaining the engine down so the torque couldn't stretch the motor mounts.
The chain/bolt combo was just tight enough to hold the engine down but not enough to defeat the vibration isolating properties of the rubber mounts.
You might give this a try. Nothing to lose but time and some inexpensive material.
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Old 10-25-2020, 11:20 AM   #3
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Possibly you have another issue that is "knocking out" the clutch fan bearings... if your motor mounts are worn out, broken or something else is causing your engine to shake or move excessively, it will create excessive strain on the clutch fan bearings. The high RPM blade wants to stay straight, while the engine movement is forcing it to shake.
Alternately if you have room, you can upgrade to electric fans, although conversion cost is a factor to consider. There may be others here with more technical experience that can help...
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Old 10-25-2020, 11:21 AM   #4
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Get someone, who knows how, to power brake the RV while you watch the engine to see if it moves enough to contact the shroud.

See where it moves but don't get run over.
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Old 11-03-2020, 05:44 PM   #5
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radiator fan breaks

Thanks for the response to my problem. I've spent much time underneath and on top of my engine (next coach will be side radiator) seeking answers with nothing visible causing breaks. One question that has been suggested is it possible that the cooling fan is mounted backward. My fan is oriented in such a way as to pull air to the rear of the coach across the radiator. I know that some coaches push air into the engine compartment and i'm not sure on my Spartan chassis with rear radiator. Anyone who can help on this thanks in advance.
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Old 11-06-2020, 07:13 AM   #6
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Just a thought - if your radiator was ever replaced the shroud may have been reinstalled underneath the brackets as in the photo I provide below. The shroud sits on top of the brackets and adds clearance. We are in a 2010 Phaeton with a mountain master chassis and the technician attach the shroud incorrectly and created this issue for us after 200 miles – fortunately we noticed it right away and I give full credit to Massey’s Diesel for sending a technician out to our RV site to reinstall the shroud- Completely fixed the issue Click image for larger version

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Old 11-07-2020, 09:14 AM   #7
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Thanks Mr Cooper for your post. My shroud is a one piece that goes around the radiator housing so your suggestion is appreciated but not applicable in my situation. I've contacted Spartan and Horton who makes the fan with no success at this point. I have found that at some point my fan part number changed to a CCW roatation where it should be CW. The CCW is whats been breaking. The part number on the build sheet Spartan 2053-FF1-001 was designated CW the replacement part from Spartan, Horton #998711502 is CCW rotation. I'm scheduled to go into a Spartan certified shop so it's hoped that he has answers. Right now the only part that Spartan/Horton has is CCW. Im also talking to folks at Source Engineering for their input and possible replacement. I would be interested in communicating with someone who has a similar chassis to see what fan is in their coach. 2009 Newmar Ventana on Spartan. Thanks again for your input.
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Old 11-08-2020, 07:11 PM   #8
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Cooling Fan Breaks

Good luck - I believe we may well have the same shroud and was only suggesting that you check that you are the not the victim of what I understand is a fairly common reinstallation issue of the shroud after radiator repair in some shops.Click image for larger version

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Old 11-10-2020, 12:04 PM   #9
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cooling fan breaks

Yes sir you may be right. On closer examination i found that the top of the shroud is bolted under the radiator flange. I am not sure if that's the correct way or not as the build sheet is not very clear. Once again thanks and i will post more when the spartan technician has looked on Dec. 1. Thanks again
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Old 10-09-2021, 09:37 PM   #10
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cooling fan breaks

Farmertom, I was wondering if you or Spartan ever figured out what was breaking your fan. I am having the same issue and the fan is being replaced now for the third time that I am aware of. I was hoping you found a fix for it.
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Old 10-20-2021, 09:40 PM   #11
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cooling fan breaks

First off I apologize for the delay in responding. We were traveling home and got caught up in the hassle of returning after being away for 4 months. Yes the Spartan technician locally (plug for Billy Thibodeaux Premier RV in Lafayette, LA) did a power run with brakes set and found the cross member underneath the rear motor mount was loose and this was allowing the engine to torque and thus move the entire motor into the shroud. Very simple repair once the diagnosis was done. Hope this helps and once again sorry for the delay.
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Old 10-24-2021, 01:44 PM   #12
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Cooling Fan Breaks

Great information, thanks. I am fairly certain that my motor is moving as well, either the motor mounts or the crossmember issue (thanks to your info). Mine started with a leak in the turbocharger system and I found it is leaking from the exhaust manifold gasket area. Since the turbocharger is hard mounted to the manifold and the intake system both, I think the engine movement caused the gasket to blow or the manifold to crack. While looking into that I found the fan blades cracked again. The prior owner had the fan replaced a few months before we purchased it last year for the same reason but his mechanic must not have checked if the motor was moving or not. It is scheduled to go in for repairs next month and I will make sure to tell them to do a power run and make sure it all gets fixed for good this time.

Thanks again.
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Old 10-24-2021, 03:17 PM   #13
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Quote:
Originally Posted by rpd37 View Post
Great information, thanks. I am fairly certain that my motor is moving as well, either the motor mounts or the crossmember issue (thanks to your info). Mine started with a leak in the turbocharger system and I found it is leaking from the exhaust manifold gasket area. Since the turbocharger is hard mounted to the manifold and the intake system both, I think the engine movement caused the gasket to blow or the manifold to crack. While looking into that I found the fan blades cracked again. The prior owner had the fan replaced a few months before we purchased it last year for the same reason but his mechanic must not have checked if the motor was moving or not. It is scheduled to go in for repairs next month and I will make sure to tell them to do a power run and make sure it all gets fixed for good this time.

Thanks again.

If you have an ISC engine the manifold is a weak point in the exhaust system and is known for cracking. The "Improved" Cummins replacement exhaust manifold is much heaver than the OEM.
The reason for the cracking is the manifold supports the entire weight of the turbo and associated piping over the engine.


Been there, paid for that.
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