So how do they do that??

[Everhard]

While cruising this great forum I came across a discussion about front hydraulic snowblowers - biggest issue for smaller tractors being the lack of gpm at the pump to even consider such an option.
Then along comes this company: Sheyenne Tooling & Manufacturing - Compact Tractor Snowblower
And they have a pump that runs off of the tractor pto (their preference is a mid pto running at 2000rpm but have an option for a rear pto where they step it up to 2000) and they supposedly T into the hydraulic system for fluid supply.
Leave out comments about it'll over-heat (they say it doesn't given typical temps when blowing snow) or any other comments.

My question is:

How can you T into the hydraulic system in the first place? (Obviously they are doing it successfully - I'm trying to understand how - I've plumbed my own grapple, plumbed my own set of 3 rear remotes so I've got a good idea of how a typical tractor hydraulics work and in my understanding as soon as you have one valve open everything downstream basically is not going to work yet they are blowing snow and running the loader at the same time? How they do that?

I'm thinking they are doing an actual T in the high pressure line going to the loader valve? And then dumping back into the tank at the other end. By doing a T in that line going to the loader valve would that keep the loader valve (and anything else downstream) still operational while the blower pump is running?

Or would they have to T into the line that is feeding the tractor hydraulic pump(s)?

E.

 

[WranglerX]

Umm maybe into "tank" line, it is a return from other systems.... And should/could possibly be a fluid source for "another" pump...

Dale

 

[oldnslo]

Since this a separate auxiliary pump that would have to connect the auxiliary Pump to the tractor reservoir in some manner. Not sure exactly how they would do that though.

Doubt they could tee into existing pump inlet without cavitating the pumps.

 

[MossRoad]

Look on page 18 of their manual....

http://www.sheyennemfg.com/manuals/sb_ct.pdf

 

[MossRoad]

As best as I can figure, in a nutshell...

Hydraulic fluid is taken from the point where your tractor pumps oil to your FEL with a T.

That oil initially fills the blower system.

Once that system is filled, it is recirculated over and over through the new PTO hydraulic pump, through the blower, and back. It's sort of a closed loop.

Any oil that is bypassed goes through a filter and back into the tractor through the transaxle drain plug, or any other plug you can find.

Since that oil has to leave the blower circuit, it requires make-up oil (charge oil) and gets that from the T.

 

[4570Man]

As best as I can figure, in a nutshell...

Hydraulic fluid is taken from the point where your tractor pumps oil to your FEL with a T.

That oil initially fills the blower system.

Once that system is filled, it is recirculated over and over through the new PTO hydraulic pump, through the blower, and back. It's sort of a closed loop.

Any oil that is bypassed goes through a filter and back into the tractor through the transaxle drain plug, or any other plug you can find.

Since that oil has to leave the blower circuit, it requires make-up oil (charge oil) and gets that from the T.

That couldn’t work very good unless there’s a built in oil cooler.

 

[MossRoad]

That couldn’t work very good unless there’s a built in oil cooler.

Did you read the OP's request not to delve into the "no oil cooler" discussion? He just want's to know how it's plumbed.

 

[grsthegreat]

My rear hydraulic power pack unit runs at 15 gpm and 3500 psi...
this is way above what any tractor can supply. Skid steers all run at these values. I知 not sure why tractors haven稚 been made to run at the same values. My rear tank holds about 20 gal of hydraulic fluid...as I recall. The hoses hold a few gallons more. For summer use they recommend a cooler unit. Winter doesn稚 need one. At these pressures and capacities my blower works great. If it were run at the 2,000 to 2,500 psi that the tractor operates, that and given the fact that as you move the tractor the pressures and flows drop..
I don稚 see how this system would work

after rereading the site, I see that there is an added pump...missed that first time. But I値l tell you what, my rear tank gets real hot when blowing snow. Steam comes off of the hoses and tank. I would not want to run this hot fluid thru my transmission. No way.

 

[Everhard]

Thanks MossRoad, I didn't think to see if they had a manual out! lol I'll check that out. Always good to learn something new...

E.

 

[ptsg]

Interesting setup but has crazy expensive written all over it. What would something like that cost? 4 to 5k dollars?

 

[MossRoad]

Thanks MossRoad, I didn't think to see if they had a manual out! lol I'll check that out. Always good to learn something new...

E.

It took me a while to find it, as it's not real obvious on the page.

Your original question peaked my interest because I have an all hydraulic machine. I've had a traditional tractor in the past, and it didn't have the flow or pressure capacity required to run something like a hydraulic snowblower without adding a 3pt pump. And, like you already know, most of those setups have their own hydraulic tank and are a close loop.

This one you linked to only uses the tractor hydraulics as a charge pump to a closed loop system, so it's not sending tons of hot oil back to the tractor. However, as you know, I know, the whole world knows, there's always concern about overheating. But we wanted to find out the plumbing of this system, and I think we've got it. :thumbsup:

 

[MossRoad]

Interesting setup but has crazy expensive written all over it. What would something like that cost? 4 to 5k dollars?

Wouldn't surprise me if it were more.

What's nice about a hydraulic blower on you FEL arms is the ability to raise and lower it in deep, deep snow and drifts. We don't get that kind of stuff but once every few decades here. I've seen it twice in 59 years. But I have seen deep drifts out in the county where the wind runs wild. 8-10 foot drifts every couple years. Would be handy around farm buildings and such.

 

[ptsg]

Wouldn't surprise me if it were more.

What's nice about a hydraulic blower on you FEL arms is the ability to raise and lower it in deep, deep snow and drifts. We don't get that kind of stuff but once every few decades here. I've seen it twice in 59 years. But I have seen deep drifts out in the county where the wind runs wild. 8-10 foot drifts every couple years. Would be handy around farm buildings and such.

That's sure is nice to be able to do.

But I still think that the Front 3 PT linkage with PTO is a more efficient, less complicated and less expensive solution. It's more versatile as it allows you to run more attachments like blade, flail mowers, etc and you can still get a decent lift height which is plenty good for snowstorms.

Front linkage with PTO for a compact tractor is around $2500 to $2800. This would also be a nice solution versus all those proprietary systems that Kubota and JD uses to milk all the money from the buyers.

Zuidberg | 324 - 354 - 394 - 424 - 474

On the other hand, a hydraulic setup like that could also be used for Post hole diggers that requires high flow.

 

[MossRoad]

That's sure is nice to be able to do.

But I still think that the Front 3 PT linkage with PTO is a more efficient, less complicated and less expensive solution. It's more versatile as it allows you to run more attachments like blade, flail mowers, etc and you can still get a decent lift height which is plenty good for snowstorms.

Front linkage with PTO for a compact tractor is around $2500 to $2800. This would also be a nice solution versus all those proprietary systems that Kubota and JD uses to milk all the money from the buyers.

Zuidberg | 324 - 354 - 394 - 424 - 474

On the other hand, a hydraulic setup like that could also be used for Post hole diggers that requires high flow.

With a 3pt implements on the front, you're limited in lift height due to the driveshaft. With hydraulic implements on the front, you're only limited by the lifts height of the FEL arms.

A hydraulic post hole digger on the FEL arms also has an advantage of power-down, as you can push on it with the FEL arms.

 

[oldnslo]

Mossroad,
I believe you are correct in how this system is plumbed.