Mf202 snowblower conversion to hydraulic

[Eazycheeze]

Hey guys. Have had this tractor a while and works amazing and starts great especially in our cold winters.



1963 i think mf202



I have a 6.5mckee Snowblower that runs off pto 540rpm



The reverse gear is not shuttle so i move quick and clog up somewhat often. I am tired of kinking the neck as well. So my plan is to convert this 6.5 snoeblower to hydrualic.i was thinking i could mount the motor where the pto shaft goes into the gear box and adapt it there as it controld both stages. Not sure if thats the best idea if you have better idea please let me know. I am fairly crafty so i have no issues fabricating what i need. Just need the best setup so i have no issues.



Then i thought id mount onto the tractor pto a 25-30gpm 3000psi pump as far as i found this should work. From there the pump would get its fluid from a 20-30gallon hydraulic tank mounted on 3pth.



Snowblower would be moved to my FEL.



Id use 3/4 hydraulic hose.



Id use a 30gpm 3000psi rated motor to the gearbox as mentioned above.



Any better ideas and anyone have ideas on specific parts if its been done before? Or link. I couldnt find what i want to do.



Also not sure where to place pressure relief or crossover valves etc in this custom system.

Edit: realized i can only run about 2000-2500psi at 20gpm with my hp.



Could i add a speed increaser with pump to run motor less rpm and still achieve 30gpm at 3000psi?



The mf202 is 35hp i believe and a pto hp of 30hp. Correct me if im wrong. Thanks

 

[oldnslo]

With 30 PTO HP you can power approximately 15 GPM at 3,000 PSI so 25 to 30 GPM would be around 1500 PSI. With hydraulics you would probably get between 70 and 80% of the input power to do work - blow snow.

Unfortunate reality is that you would potentially be better off creating a mechanical drive train from rear PTO to a front mount blower. There are companies that make these types of drives but I do not remember who they are.

 

[Eazycheeze]

With 30 PTO HP you can power approximately 15 GPM at 3,000 PSI so 25 to 30 GPM would be around 1500 PSI. With hydraulics you would probably get between 70 and 80% of the input power to do work - blow snow.

Unfortunate reality is that you would potentially be better off creating a mechanical drive train from rear PTO to a front mount blower. There are companies that make these types of drives but I do not remember who they are.

Hey thanks for the reply. So if i were to go down to 20 gpm at 2500?

What do you mean 70-80?% input power. I seen that elsewhere but i am confused as to what exactly that means.

Out of 30hp i only get 70-80 of 30hp?

I have some access to hydraulics which seem much easier and potentially cheaper to do as well as with hdraulics on my FEL i can raise or lower or tilt it as needed.

 

[oldnslo]

The formula for figuring input power to drive hydraulic pump is:

HP = GPM x PSI divided 1714 x pump efficiency.

For ease of figuring I just divide by 1500 since that is approx 85% efficient for pump.

30 HP x 1500 divided by 20 GPM = 2,250 PSI

The 70 to 80% is figuring both pump and hydraulic motor at approx 85% along with pressure losses in the lines.

 

[Dmacleo]

will lose the little bit of "flywheel" energy the pto shaft itself delivers also. can matter a bit in heavy wet snow.
is your low gear fwd that much slower than your reverse gear?

 

[zzvyb6]

The 'lost' energy is converted to heat, so you will need a recovery tank and probably a cooler. Why no just ket a loader fram mount kit and put an old truck snow plow on it. You don't need any extra hydraulics, just use the curl circuit for angling it. Only 1 thing better: my 60" front broom on my 1435 mower. I even did a path in the back fields for the golf carts and dogs today. Looks like the deer took a liking to it, too...

 

[grsthegreat]

My hydraulic blower is powered off a tank holding 25 gal of hydraulic oil and the pto mounted pump runs at 15 GPM at 3,000 psi . Hoses are 3/4” flat face couplers. Blower is 80” wide. Tractor is 45 HP ( not sure what HP at pro is). It handles both wet and dry snow just fine. Blows it out of the way.

Of course i have to travel slower with the wet stuff.

I have an HST tractor which really helps with a hydraulic blower to keep it from clogging up. There are no shear pins to break.

Mine also has pressure bypass, chute rotation and chute elevation controlled from a joystick.

But i also have a plow for the start of winter when ground is too wet for blower…. Especially with gravel driveway

 

[Sportsman762]

The MF202 was 40 engine, and about 35PTO HP. @oldnslo did a great job with the math for the hydraulic system and @zzvyb6 and @grsthegreat pointed out the cons of the hydraulic system. A few companies make front mount snow blower frames that fit under the tractor and transmit the rear PTO power to the front. Making one would not be too hard.

Schulte uses a gearbox to transmit the power.

FM-115 - Schulte Industries

This frame is compatible with the Schulte model SDX or RDX snow blowers. Together they offer enhanced visibility and ergonomics. Call 306-287-3715.

www.schulte.ca

Erskine uses chains transmit the power.

Front Mount Snowblower

Erskine® snowblowers have been proven for over 50 years by people who need to move snow fast after every snowfall or blizzard.

erskineattachments.com

However the MF202 has a low range 1st gear speed of 1.2mph and a reverse gear speed of 1.6 so your not moving much slower. You will also need hydraulics for a lift on the front.

 

[Eazycheeze]

Hey guys thanks for all the info. I realize the pto drop under tractor is better but as stated i have good connections to hydraulic supplies making it a easier option to make everything i need.

Id also mount the snowblower to my FEL so i have angles and lift and my rear 3pth doesnt like the cold for the first 30 minutes and doesnt lift.

My FEL is running on a pump off my flywheel. Seperate hydraulic system.

Good to know its a 40hp.

I cant use a plow as we get wayyy to much snow to push. It has to be throw aside.


So as grsthegrwat.i can get a 15gpm pump at 3000psi for headroom but put a relief and set it for 2500psi?

Motor can be somewhere like ~540 RPM at 15 GPM
(~6.4 in³/rev / ~105 cc)
And run a 25-30g tank

Hoses for suction to pump i should get 1 1/4? Or 1 1/2?
What kind of suction filter to pump a 100 or 150 micron?


Pressure line from pump to motor use a 3/4

Return from motor to tank use a 1"

Return filter before tank use a 10-25 micron

And use a crossover relief valve from pressure line to valve to motor close to motor set 2-300 higher than main relief

Main relief after pump pressure line set to 2500 so crossover goes to 2700 psi ish.

Dont think i need a recovery or cooler as i only need it for an hour or 2 tops every snowfall

My snowblower is a 78inch mckee id mount motor onto shaft that goes into gear box of blower as its setup for both stages already. Simple. I already have chute controls 360 and up down for the flap.

Ya i suppose its not much slower but my neck kink is getting crazy. Rather drive forward then backwards anywho

 

[grsthegreat]

Mine has a 10 micron filter. Like a 2 in return hose. I dont use a cooler, its cold enough while moving snow to keep tank cool. If i used pump in summer id add a cooler.

Im not sure what the pressure relief is set at, that was done by manufacturer, QUICK ATTACH.

 

[oldnslo]

Ezcheeze,
You also need to figure in the power to run the transmission and move the tractor along with power to run hydraulic pump for the loader. Grsthegreat has a HST tranny so he has infinite speed forward and can feather his speed.

Yes you can unquestionably build a power pack and yes it will move snow but just want you to be aware of the other power draws on the engine so you may not have 35 HP at PTO while driving and operating loader.

 

[zzvyb6]

Make sure you get the rotations correct. Otherwise you'll be sucking snow off the banks and paving your driveway with it....

 

[Eazycheeze]

Make sure you get the rotations correct. Otherwise you'll be sucking snow off the banks and paving your driveway with it....

Lmao good call

 

[Eazycheeze]

Ezcheeze,
You also need to figure in the power to run the transmission and move the tractor along with power to run hydraulic pump for the loader. Grsthegreat has a HST tranny so he has infinite speed forward and can feather his speed.

Yes you can unquestionably build a power pack and yes it will move snow but just want you to be aware of the other power draws on the engine so you may not have 35 HP at PTO while driving and operating loader.

Fair enough ya everything draws. Figure il shoot for a system like this but i know i wont get full speed