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Next generation engine cooling
As seen on first delivered Marathon X3-45 with new electric fan cooling package.
Yellow pull handle releases swing out hinged door. 2018 Marathon X3-45 in Palm Beach, FL
Picture #4 location has label mistake….should read passenger side.
Message on 3ad picture in yellow tag…DA
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13 Replies
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Prevost supplied, or a Marathon update?
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Prevost …I have more photos Mark….but wasted to much time trying to correct….I’ll attempt later
2 out of 5 turned during transfer …..what’s wrong with the download ?
Should I just post ? Admin will correct ?
AL
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Mark, that is Prevost. You will not believe all the space the fan, shroud, gearbox, belts, etc. take up that is now open. I am sure the converters will figure a use for that additional space as long as they do not mess up the air flow.
Stay warm up there in Ice and snow country.
Fred
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Al, please post, thx!
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Thanks Fred. It was only -21 the other morning and about -6 today, so we have a heat wave! The bus is all tucked away until late April.
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Wow! I want the upgrade.
Davy
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An array of small electric fans. A single or some number of failures doesn’t kill the whole program. Interesting.
1984 96" with 8V92TA
(remodeled Liberty Coach)
Greenwood, MO -
I’m sure the engineers have it all worked out but as someone who almost lost a fan belt I have become very sensitive to how little it takes to shut us down.
A spare belt solves a problem with engine driven fans. Our fans have to move a whole bunch of air to the point where someone once said it takes a lot of HP to spin the fans. I heard as much as 30 HP. If that is true the electric fans will draw a lot of power so an alternator failure could become a show stopper.
I would like to hear the details.
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If an alternator fails, we can charge our chassis batteries thru the house system. Either with an on board charger, or a charge splitting device or as a last resort a jumper cable. There is not back up for a failed belt, bearing, etc, etc.
A retrofit kit would have to draw air thru the radiator stack due to the close distance to the outside panel, at least on my coach. It would save some weight and one fan would not kill the whole system.
Interesting
1999 XLV X-6872, liberty #440 -
I guess Bernie will give us first hand info about the fans when he gets his new ’19 Marathon in May.
Can’t wait to see the pics!
I know that our fan, when it kicks on high, will pull leaves from the ground into the grill.
I feel confident that Prevost would have never gone to this set-up unless it was top notch.
Safe travels to all!
Mark
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I f you want to know about it look up GHG 17 Volvo features and benefits.
It is a 24 front and back booklet with big pictures and big print, I can’t print all that.
You cannot retro this fan drive due to the multiplex change from Prevost.
Before you start throwing stones A1 read the book.
Later
bv
1999 XLV X-6872, liberty #440 -
Wasn’t throwing stones Bernie but wondering how to cope with such issues as an alternator failure. To move a lot of air takes a lot of power. Not all coaches are converted so the house systems are an alternative to chassis systems, and this becomes especially true if a prediction made during the Prevost show seminars comes true. It is predicted future coaches may be able to do away with the generator so consideration has to be given to how to cope with failures that can leave a coach on the side of the road.
If 30 HP is a true need to be able to run fans at high speed roughly speaking that is 15KW of energy. I know at low speeds the fans will require much less energy but my point is I am curious as to how owners can cope with certain failures. Surely they have planned for them just like they planned when they added the pneumatic belt tensioners so a spare belt can be used with the turn of a valve.
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Thanks for posting the information, Bernie. That is interesting. I initially assumed the fans were pulling the air through the radiator.
Davy
Jeff and Lindsay
91 Marathon XL
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