Hydraulic Orbit motor - opinions

SDMike · Dec 27, 2019

Good Morning. I am building a sweeper attachment for my loader to broom the rocks off the grass after the spring melt. What implement or attachment at a salvage yard would have a high-speed orbit motor? 1st thought ran to an old bean head reel, but I do not think that would be fast enough. Anything from a round baler, haybine, or combine? Trying to build on a budget, but most of the new orbit motors are what I am trying to spend for a total cost. Thanks for the suggestions.

Mike

Bob · Dec 27, 2019

(quoted from post at 11:09:55 12/27/19) Good Morning. I am building a sweeper attachment for my loader to broom the rocks off the grass after the spring melt. What implement or attachment at a salvage yard would have a high-speed orbit motor? 1st thought ran to an old bean head reel, but I do not think that would be fast enough. Anything from a round baler, haybine, or combine? Trying to build on a budget, but most of the new orbit motors are what I am trying to spend for a total cost. Thanks for the suggestions.

Mike

Are you direct-driving the brush?

To start with, how many GPM's do you have available, and at what PSI and how fast must the motor run?

If low flow, but high PSI, a small displacement hydraulic motor would be what you'd want, if lower PSI, but large GPM, a larger displacement motor would be needed.

If you have "haybine" parts available, how about using the motor AND the PTO pump as a pair, then using a sprocket and chain drive to get the speed you need at the brush?

fixerupper · Dec 27, 2019

Just thinking off hand a motor off an old Deere bean head, the big diameter motor they used might work OK for you. You do not need big speed, maybe 250 RPM's if the motor is direct coupled to the brush. Those bean head motors did not require a lot of GPM's and might run at about the speed you need. Just an idea.

rrman61 · Dec 27, 2019

Could you use the wheel and drive from and old style hay rake?that way you won?t need hydraulics at all

SDMike · Dec 27, 2019

I will be running it with my John Deere 4010D. I have converted my 48 loader to twin tip, and bobcat quick attach. I have a 66" broom and plan on direct driving it,
similar to the picture.

Mike

Eagle Beagle · Dec 27, 2019

Surplus Center in Lincoln Nb. have the motors. They also have the math formulation tables you need to determine the displacement you need at the given GPM on your tractor.

https://www.surpluscenter.com/Hydraulics/

Beagle

David G · Dec 27, 2019

The skid steers have a pretty high hydraulic flow, do not know if your 4010 is near that.

David G · Dec 27, 2019

I looked up the flow n the 4010, says 13 GPM, I do not know if the 6 GPM for steering comes out of that or is on top.

It will also be 2200 PSI

David G · Dec 27, 2019

That is interesting, calculated HP comes out about 17 HP, guess very little of the 90HP goes to the hydraulics.

Bob · Dec 27, 2019

(quoted from post at 14:01:57 12/27/19) I looked up the flow n the 4010, says 13 GPM, I do not know if the 6 GPM for steering comes out of that or is on top.

It will also be 2200 PSI

Factory shop manual states that the flow from an SCV will be in the 6 - 7 GPM range.

That's what the O.P. can expect to get, unless tapping into the closed center circuit ahead of the SCV's.

ss55 · Dec 27, 2019

As a kid I remember raking rocks out of the lawn with a garden rake and a scoop shovel. Can you send the grand kids out to do it when they get on grandma's nerves? One kid at a time is best to avoid rock throwing fights. Will the lawn support a large tractor before the grass starts growing?

Check how much flow and pressure your tractors hydraulic system can deliver at full throttle. From that you can determine how much HP the system can deliver.

If you won't be putting a lot of hours on the unit, maybe a new or used gas engine (20 to 30 HP multi-cylinder from a riding mower) and fabricate a belt/chain drive would be an option? A separate engine would let you idle the tractor and control your ground speed with the tractor throttle.

Does the sweeper have adjustable wheels or skids for depth control?

Steve@Advance · Dec 27, 2019

That needs to be calculated using the available GPM and pressure from the aux ports on the loader. That info should be in the manual or machine specs.

Then size the hydraulic motor around those numbers.

It is essential to do your homework first. Hydraulics are expensive and unforgiving. Not something to leave to guess work or close enough.

Here is a calculator to determine the needed motor. The motor is rated by volume per revolution and torque per PSI. Low displacement motors turn fast with less torque, high displacement motors turn slow with high torque. Keep in mind you can chain drive the brush to adjust the speed and torque, and add a needle valve to fine tune the speed.

If you're going used, you'll need to look at part numbers and determine the displacement. Hint, a thin center will be low displacement, a wide center will be high displacement.
Motor Calculator

dzc3 · Dec 27, 2019

Steve offers a great link to help determine motor size, another factor to consider is the valve being used does it have a detent so you can let the motor roll to a stop. The motor will not like coming to a sudden stop.

Yukon3639 · Dec 27, 2019

Mike[/quote]
Don t be too concerned with the speed of broom
Power/torque is more important
All of our hydraulic brooms have speed adjusters and only the rookies run at high speed it just wears bristles out much faster
Very productive at slow speed

JMS/.MN · Dec 28, 2019

Unloading augers on a grinder mixer.

Hydraulic Orbit motor - opinions

SDMike

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Bob

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fixerupper

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rrman61

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SDMike

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Eagle Beagle

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David G

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David G

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David G

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Bob

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ss55

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Steve@Advance

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dzc3

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JMS/.MN

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