need help modifying snowblower

[dozer]

I recently came across a PTO snowblower for free. It is a 7 foot snowblower with a 540 PTO. where can I find a orbital motor to connect to this. The reason it was give away is they had it on a 50hp tractor and snapped the PTO shaft. They never bothered to get it fixed and it has sat in the trees for the last ten years. I went and looked at it and the blower still turns by hand. It is a simple two stage blower. I have and ASV 4810 it would go on with a high flow pump. WHat I am looking at doing is running the blower off the HF and using the Aux. Hydros to run the directional chute. I think it will be easy enough. Where can I find a orbital motor that does 30 GPM @3200 PSI and runs at 540 RPM? thanks, Lucas

 

[skidsteer.ca]

I believe to use your high flow any flow from your standard flow pump is already being used. Your 30 gpm includes both pumps combined. So unless you have some additional hydraulic valves (say like rear stabilizers) that can divert flow from your standard pump to control the chute, you are down to a couple options. Electric winch to rotate the chute. Or electric over hydraulic valve mounted on the blower to split some of the flow off the main circuit as required to control the chute. Or a manual chute.
Your looking for @ a 12.7 cubic inch motor volume to give you 540 rpm at 30 gpm flow.
I looked through www.surpluscenter.com cat but seen nothing designed to run with that much flow at the rpm you want. You could try www.baileynet.com or www.loaderpartssource.com
Ken

 

[dozer]

I believe to use your high flow any flow from your standard flow pump is already being used. Your 30 gpm includes both pumps combined. So unless you have some additional hydraulic valves (say like rear stabilizers) that can divert flow from your standard pump to control the chute, you are down to a couple options. Electric winch to rotate the chute. Or electric over hydraulic valve mounted on the blower to split some of the flow off the main circuit as required to control the chute. Or a manual chute.
Your looking for @ a 12.7 cubic inch motor volume to give you 540 rpm at 30 gpm flow.
I looked through www.surpluscenter.com cat but seen nothing designed to run with that much flow at the rpm you want. You could try www.baileynet.com or www.loaderpartssource.com
Ken

how did you come up with that number for the size? I found something similar at baileynet but the motor is only 4.9 CU do you think that would work? the torque looks high enough. I have seen it done a few times I just want to make sure it will work before I drop $400 on it. http://baileynet.com/index.php?dnfwd=1&page=ProductDetails&line=HMC2&baileyno=254-081 I did not know that about ASV. I only assumed I could use it because running a simple hydraulic cylinder shouldn't take much from the main pump. I could use an electric actuator as well though. thanks Lucas

 

[skidsteer.ca]

how did you come up with that number for the size? I found something similar at baileynet but the motor is only 4.9 CU do you think that would work? the torque looks high enough. I have seen it done a few times I just want to make sure it will work before I drop $400 on it. http://baileynet.com/index.php?dnfwd=1&page=ProductDetails&line=HMC2&baileyno=254-081 I did not know that about ASV. I only assumed I could use it because running a simple hydraulic cylinder shouldn't take much from the main pump. I could use an electric actuator as well though. thanks Lucas

Online calculators here
https://www.surpluscenter.com/techhelp.asp?UID=2009110917234059&catname=
That 12.7 ci motor will give you 540 ft lbs of torque at 3200 psi and I think (memory) about 56 hp.

4.9 ci will give you 1414 rpm at 30gpm.
Of course the max rated flow is at max engine rpm so you may want to get your 540 rpm at the blower at less then full engine rpm.
It will work, you just need another valve for the chute rotator and defector if you want them power.
Ken

 

[dozer]

Online calculators here
https://www.surpluscenter.com/techhelp.asp?UID=2009110917234059&catname=
That 12.7 ci motor will give you 540 ft lbs of torque at 3200 psi and I think (memory) about 56 hp.

4.9 ci will give you 1414 rpm at 30gpm.
Of course the max rated flow is at max engine rpm so you may want to get your 540 rpm at the blower at less then full engine rpm.
It will work, you just need another valve for the chute rotator and defector if you want them power.
Ken

THis one seems like it would fit the bill pretty good. I wouldn't have to run the machine @ full RPMs and I think I would still be getting the required HP to run the blower. https://www.surpluscenter.com/item.asp?UID=2009110920171933&item=9-072-1040&catname=hydraulic
let me know what you guys think. thanks, Lucas

 

[TriHonu]

THis one seems like it would fit the bill pretty good. I wouldn't have to run the machine @ full RPMs and I think I would still be getting the required HP to run the blower. https://www.surpluscenter.com/item.asp?UID=2009110920171933&item=9-072-1040&catname=hydraulic
let me know what you guys think. thanks, Lucas

Another option is not to direct drive the blower with a hydraulic motor. If you mount a hydraulic motor and use sprockets and roller chain you can select gears that will give you the 540 rpm you need.
The bad is having an exposed chain, but you may be able to build some guards to keep stuff out of the chain.

 

[skidsteer.ca]

THis one seems like it would fit the bill pretty good. I wouldn't have to run the machine @ full RPMs and I think I would still be getting the required HP to run the blower. https://www.surpluscenter.com/item.asp?UID=2009110920171933&item=9-072-1040&catname=hydraulic
let me know what you guys think. thanks, Lucas

They have a 11.9 ci https://www.surpluscenter.com/item.asp?UID=2009110920171933&item=9-072-1041&catname=hydraulic and a 10.? too.Any would work,depends on where you want to run your engine, how much hp the blower was designed for. Might want to ask them about the 20gpm versus the 30 gpm flow spec.
Ken

 

[dozer]

They have a 11.9 ci https://www.surpluscenter.com/item.asp?UID=2009110920171933&item=9-072-1041&catname=hydraulic and a 10.? too.Any would work,depends on where you want to run your engine, how much hp the blower was designed for. Might want to ask them about the 20gpm versus the 30 gpm flow spec.
Ken

OK I used this calculator to obtain the Torque
http://www.dragtimes.com/horsepower...=40&rpm=540&submitButtonName=Calculate+Torque
This calculator to Convert the Torque to in/lbs
http://www.onlineconversion.com/torque.htm
And it all points to the 11.9 being enough to directly run the blower. I think I got my stuff together. If anyone thinks something looks out of place let me know.
thanks, Dozer

 

[skidsteer.ca]

OK I used this calculator to obtain the Torque
http://www.dragtimes.com/horsepower-torque-calculator-conversion.php?hp=40&rpm=540&submitButtonName=Calculate+Torque
This calculator to Convert the Torque to in/lbs
http://www.onlineconversion.com/torque.htm
And it all points to the 11.9 being enough to directly run the blower. I think I got my stuff together. If anyone thinks something looks out of place let me know.
thanks, Dozer

That should work just fine. You will still have @ 50 hp to run the blower. You will be able to exceed the 540 rpm designs speed but not by too much.
For a coupler from the motor to the blower shaft I'd recomend a single # 60 sprocket on each shaft with @ a 5" diameter. Then wrap the pair of sprockets in a double wide chain to couple them together. I had used some lovjoys is the past but they are a pita, always needs a need rubber.
Ken

 

[dozer]

That should work just fine. You will still have @ 50 hp to run the blower. You will be able to exceed the 540 rpm designs speed but not by too much.
For a coupler from the motor to the blower shaft I'd recomend a single # 60 sprocket on each shaft with @ a 5" diameter. Then wrap the pair of sprockets in a double wide chain to couple them together. I had used some lovjoys is the past but they are a pita, always needs a need rubber.
Ken

thanks for the help. I will post some pics when I get everything cobbled together. how do I use paragraphs in this program? thanks Dozer

 

[skidsteer.ca]

thanks for the help. I will post some pics when I get everything cobbled together. how do I use paragraphs in this program? thanks Dozer

About 6" down from the top in the center is a "profile" link, go in there and put a check in "use free html editor"
Ken

 

[leaddog]

I have a asv 4520 and it has the pto built in. I'm planning on removing it and putting it on a 3pt att plate and then I can run my snowblower and other attachments with it using the lift arms. That way I don't have to by a seperate motor for each attachment. I think you can do the same. leaddog

 

[dozer]

I have a asv 4520 and it has the pto built in. I'm planning on removing it and putting it on a 3pt att plate and then I can run my snowblower and other attachments with it using the lift arms. That way I don't have to by a seperate motor for each attachment. I think you can do the same. leaddog

I wish I did have the PTO option. My 4810 did not come with it. The had that option and an option for three point arms. The more I am looking at it the more I am leaning towards a three point attachment with the PTO. That way I can get a orbital motor that can use my high flow to its most potential and I can buy any standard three point attachment without modification. I think I can get something like 52HP out of my 30GPM @3000PSI system. That should be more than enough PTO power to run most 3 point attachments. I also lost my angle on getting the blower for free so now I will have to purchase one anyway.