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slinger

Joined: Sep 22, 2010
Points: 158

2010 Ariens Platinum 24" - higher impeller speed
Original Message Oct 5, 2011 5:02 pm

I have a 2010 Platinum 24. I only seem to use it for EOD duty and the occasional heavy storm. I use my singe-stage for everything else. Could I optimize my Ariens by removing the stock 250cc Polar Force engine and bolting on a bigger engine...let's say a 342cc or something similar? Is there a bigger Briggs (Polar force, Intek, etc.) that would mount on that frame and accomplish my objective without too much modification? The stock engine is ok, but if my goal is to cut down the EOD pile and be able to throw it across the street would the big motor/24&quot; bucket combo get me there? I don't care about the warranty. Can anyone recommend a specific engine for this project and the associated parts (pulleys, belts,etc.) that might be required? And of course some extra shear pins!

This message was modified Sep 23, 2014 by slinger

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Shryp

Location: Cleveland, OH
Joined: Jul 26, 2010
Points: 532

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #14 Oct 8, 2011 6:48 pm

Just use regular pulleys with set screws. The ones that bolt to the crank probably just make assembly easier as there is nothing to line up.

jrtrebor

Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #15 Oct 8, 2011 10:25 pm

slinger - You won't be able to find a single dual belt pulley that will work.
You have to use to separate pulley's.
I put a 3.25" on my Ariens 1132 (soon to be 1332)
Here is a link where you can get the pulley's your looking for and will need
Pulleys
Actually It's 3.45" but that's close enough.
You can search by shaft size to find the other pulley you'll need to drive the tractor.
Stock on most Ariens I believe is 2.50"
When using two separate pulleys instead of the dual pulley.
You have to play around with how to put them on the shaft.
Collar forward, collar backwards. Or you may even have to grind off
some of the collar on one or both to make it shorter to get the alignment right with the lower pulley.
But it's very do-able.
I actually cut a steel dual belt pulley in half to use the 3.25" side.
Then drilled and tapped the collar above the key way slot for a set screw.

This message was modified Oct 8, 2011 by jrtrebor

slinger

Joined: Sep 22, 2010
Points: 158

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #16 Oct 9, 2011 2:10 am

I found a 2 groove pulley that's 3.35" od x 1" shaft here: http://www.grainger.com/Grainger/VBelt-Pulley-3X520?BaseItem=3X520

I estimate that it should take the 14" dia impeller speed from 1010 rpm (factory) to about 1340 rpm. There's also a 3.95" dia. available, but that might be too much (1577 impeller rpm).

I will have to bend the belt finger to try to make it fit. Are you saying that these 2 groove pulleys will not position the belts properly to line up with the impeller shaft pulleys? Will this increase in impeller speed on a 14" impeller make much of a difference (+330 rpm)? The extra hp from the 342cc motor should handle this extra load, no?

This message was modified Oct 9, 2011 by slinger

jrtrebor

Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #17 Oct 9, 2011 10:31 am

Sorry about that, forget about what I said in my last post. I didn't realize that your blower has a three belt system. That pulley from Grainger may work. But your going to have to make sure
that the spacing between the two grooves is the same as your stock pulley. If the belts aren't spaced exactly the same they will never stay on the impeller shaft pulley. You'll also have to make
sure that you will be able to get the new pulley positioned on the crankshaft so that you have good vertical alignment of the belts between the drive pulley and the impeller pulley.

The problem you may run into with this. Is that the Grainger pulley has the collar with the set screws to hold it on the crank. You may have to slid it on the crank with the collar forward. And then find out
that when you get the belts aligned vertically that the collar with the set screws is to far off the end of the crank for the set screws to do any good. Or if you put the pulley on with the collar in the
back it may hit the other pulley before you can slid it on far enough to get good vertical alignment. There really isn't any way to know if the Grainger pulley will work without buying and trying it out.

Your RPMs calculations sound about right. And I would agree that a 3.95" would be to large. The increase in impeller RPM will make some difference. In that you will be able to process more snow
through the blower at any given forward speed than you could before. Decreasing the space between the impeller blade tips and the housing will also make the most noticeable difference in the blowers ability to really throw wet and slushy snow without clogging the chute. Just a heads up, you may have to modify the belt cover with the larger diameter pulley's.

slinger

Joined: Sep 22, 2010
Points: 158

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #18 Oct 28, 2011 9:28 pm

Well, changing the 2 groove auger drive pulley on the engine shaft is a no-go. Ariens uses a custom made part that extends the pulleys past the end of the shaft by a couple of inches. So, the other alternative is to reduce the size of the 2 groove pulley that goes on the impeller shaft. The stock part is 8.5" diameter with a 1.65" center hole and 3 bolt pattern that mounts the hub. Does anyone know of a similar pulley that measures between 6 to7" in diameter or am I dead in the water again?

jrtrebor

Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: 2010 Ariens Platinum 24" EOD Machine?
Reply #19 Oct 29, 2011 10:14 am

slinger wrote:

That pulley looks a lot like and automotive pulley. You might try a junk yard. Maybe you could get lucky and find one with the OD your looking for. The center hub hole will probably not match yours.
But a competent machine shop or do it yourselfer could get your hub mounted. The offset could also be an issue but possibly resolved with shims / washers on the hub. I'm sure it's do-able if you can
find one with the right diameter.

carlb

Joined: Nov 16, 2010
Points: 279

Re: 2010 Ariens Platinum 24" - is a smaller impeller pulley available? Picture attached
Reply #20 Oct 29, 2011 12:07 pm

Strange that they would allow the pulley to sit out 2" past the end of the shaft which is probably 2 7/8" long as this will put a lot of stress on the main engine shaft bearing. One option you have is to have a piece of 1" dia stock center drilled for the correct size hole so you can bolt the crankshaft extension to the original shaft and effectively extending the crankshaft 2" i would suggest using a grade 8 bolt of the correct thread and size to attach it with. Any machine shop can easily center drill the shaft on a milling machine. I suspect this would be easier than trying to find the correct size lower pulley with the correct offset.

Carl

slinger

Joined: Sep 22, 2010
Points: 158

Re: 2010 Ariens Platinum 24" - is a smaller impeller pulley available? Picture attached
Reply #21 Oct 29, 2011 12:40 pm

Yes, the accessory drive pulley on the engine shaft is a unique design. It is keyed and slides on the shaft easily. All pulleys (this one and the drive pulley below it) are held in place on the engine shaft by a 3/8" x 2" long bolt in the end of the shaft.

carlb

Joined: Nov 16, 2010
Points: 279

Re: 2010 Ariens Platinum 24" - is a smaller impeller pulley available? Picture attached
Reply #22 Oct 29, 2011 1:14 pm

you could have the machine shop drill and key a larger piece of stock to go over the existing crankshaft end and then have it turned down to 1" to accept standard pulleys further out but that might get a little expensive. That appears to be a very short crankshaft end sticking out of the engine

This message was modified Oct 29, 2011 by carlb

slinger

Joined: Sep 22, 2010
Points: 158

Re: 2010 Ariens Platinum 24" - is a smaller impeller pulley available? Picture attached
Reply #23 Oct 29, 2011 3:34 pm

carlb: The engine driveshaft is actually 2 7/8" long just as you thought. The drive pulley is still on the shaft in the picture. It probably looks shorter because it's cold in the garage!

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