Need recommendations for a hydraulic motor for a shredder/brush cutter conversion

[tmc_31]

Hi All,

I have acquired an older 5' Modern 3 pt shredder that I want to convert for use as a light duty brush cutter on my skid steer. My problem is finding the right hydraulic motor to use.

My skid steer is a New Holland L190 (early model). The specifications say that the Hydraulic flow on the aux circuit is 21.9 GPM at a pressure of 2500psi.

I would like to find a Geroler motor that would turn at 540rpm or slightly higher, and produce close to 30 HP. Ideally it will have a 6 spline output shaft like the one on my tractor. I would prefer something that won't require a case drain as I don't have provisions for one on my loader.

I have talked with the tech support group at Surplus Center. They say that they don't have one that will work because the 21.9gpm flow on my loader is higher than any motor they have available.

Any suggestions or recommendations will be appreciated!

Thanks,
Tim McMurray

 

[Skagit]

Call Motion Industries, they should be able to set you up with what you need. Our local rep is awesome at figuring out this kind of thing.

 

[ptsg]

So, this one from SurplusCenter wouldn't work? 9.59 cu in PTO Drive Motor BMSY16E2SLS | Low Speed High Torque Hydraulic Motors | Hydraulic Motors | Hydraulics | www.surpluscenter.com

It's rated for 19.7 GPM, while they rate your machine to 21.9 GPM, which may not even reach that. The only way to know the exact volume at the Aux circuit, would be by using a flow meter.

Anyways, you can always back off the throttle a little bit. On the pressure, I don't think those extra 300 PSI versus what the motor can handle (2200 PSI continuous), would make that much difference, but you can always run a pressure relief valve for the motor.

 

[Rich B1]

Your aux circuit should have an adjustable relief. You can set it lower.

Some, but not all aux valves can be adjusted for flow rate as well. If non-adjustable, it may be possible to make a shim or slug to limit spool travel to lower flow.

 

[tmc_31]

Thanks guys, I am waiting on a call back from Motion Industries for help on choosing the correct motor.

The tech rep from Surplus Center was pretty adamant that any higher continuous flow rate or pressure than a hydraulic motor is rated for would spell an early demise for the motor.

I talked to my service rep about the specs for the hydraulics on my skid. I asked him if the flow and or pressure was adjustable on the aux circuit. He said it was not.

Hopefully the guy from Motion Industries can shed some light.

 

[Skagit]

Thanks guys, I am waiting on a call back from Motion Industries for help on choosing the correct motor.

The tech rep from Surplus Center was pretty adamant that any higher continuous flow rate or pressure than a hydraulic motor is rated for would spell an early demise for the motor.

I talked to my service rep about the specs for the hydraulics on my skid. I asked him if the flow and or pressure was adjustable on the aux circuit. He said it was not.

Hopefully the guy from Motion Industries can shed some light.

You can always put an adjustable flow valve in the circuit (the style with the third port that returns), I've done that in the past when building implements for a tractor that doesn't have an adjustable remote to run it.

 

[tmc_31]

You can always put an adjustable flow valve in the circuit (the style with the third port that returns), I've done that in the past when building implements for a tractor that doesn't have an adjustable remote to run it.

Does it return to the tank?

 

[Dave M7040]

I used a pressure compensated flow control for the hydraulic sickle mower on my Kubota M7040.

I have two lines coming from the rear remotes to the sickle mower.

The one line goes into the flow control and then back out to the motor.

The motor return line has a Tee where the flow control can dump flow. This line goes back to the rear remote.

I have a strobe tach and can adjust the flow to the motor to get exactly the rpm I want.

So to answer the question does it return to the tank the answer is yes but it does not need another line.

For $90 on eBay but available many places.

https://www.ebay.ca/i/173382010220?...bhZqFKmtDW8KklARqXg34eckSAGkBj4gaAkEQEALw_wcB

When you are operating something with a lot of inertia such as your cutter you should be using a control valve with a MOTOR spool. It differs from a valve normally used to control hydraulic cylinders which lock the cylinder when in the neutral position. A motor spool allows flow back to the reservoir when in the neutral position.

Another issue to include in your design is a way to protect the hydraulic motor is a blade hits something.

Dave M7040

 

[tmc_31]

I spoke with a hydraulic specialist from Motion industries this morning, he recommended the Char Lynn 104 1024-006 motor for my application. I will also install a check valve for motor wind down.