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Can HIGH FLOW be run in REVERSE?

Discussion in 'Compact Equipment Attachments' started by Bayrat, Sep 13, 2020.

  1. Bayrat

    Bayrat Well-Known Member

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    This may sound like a dumb question to most of you, however, I have conflicting information from both a dealer and manufacturer's websites.

    My Kubota SVL75-2 has the high flow option. I am going to purchase a SkidPro Industrial brush cutter, they appear to be the best unit for the dollar right now. Since these are "drop-down" blades exactly like Blue Diamond's setup, you can't simply flip them over to utilize the other side.

    The low flow cutter can be run in reverse utilizing the pilot controls. High flow is what I prefer, but can the pilot control run that cutter in reverse also? Here are some answers to date:
    • Dealer service manager- "um, it should, look in your manual" Me "I already did, it's not in the manual".
    • Various manufacturer websites- the blades cut on both sides
    • Most manufacturer websites say pretty much the same thing, without specifying whether they mean just low flow or also high flow for running in reverse.
    • The blades are $330 a set, so that's a big deal when you are trashing them in brush and occasional rocks. Using both sides is a big dollar saving.
     
  2. seville009

    seville009 Well-Known Member

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    maybe just flip the hoses when you want to lock it in reverse hi-flow. Probably have to get a second set due to the connections
     
  3. Bayrat

    Bayrat Well-Known Member

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    I really don't know if high flow pumps run backward, but if doing as you say, it would be easy to add a couple of adaptors to accomplish it.
     
  4. seville009

    seville009 Well-Known Member

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    the pump on the skidsteer would still be running in the same direction. The hoses on the implement would swap connections on the skidsteer.

    Note - this is just a thought/pondering; I have no clue if it will work.
     
  5. f311fr1

    f311fr1 Senior Member

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    on my CID brush cutters you swap the hoses at the motor on the cutter. Most hi flow cutters / mulchers are set up to run in one direction only to allow the blades to spin down. The check valve between the main motor lines allow the motor to spin down with out blowing the shaft seal.
     

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  6. Bayrat

    Bayrat Well-Known Member

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    Are you swapping the hoses on a high flow CID? Your explanation makes sense and I have seen the video of swapping the hoses on the CID Extreme but wasn't certain about the flow except that it has two hoses and no case drain. Their piston pump does have a case drain.

    Also, that would mean the check valve is at the pressure side also I assume.
     
  7. Tones

    Tones Senior Member

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    Hydraulic motors can be run in either rotation casedrain or not. However some machines can't drive the hiflow in either direction so swapping the hoses is the only option. Some attachments have a directional valve ie forestry mulchers so swapping hoses on the motor is the go
     
  8. f311fr1

    f311fr1 Senior Member

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    Look at the drawing. The pressure is on the left, return on the right. When you close the valve the motor keeps spinning due to centrifugal force. This tries to turn the motor into a pump. The check valve allows the oil to flow in a loop preventing the motor from cavitation on the left side and over pressurization on the right side. The normal skid steer valves for the aux circuits are closed center. If the cutter does not have the spin down check, case drain with surge check to atmosphere the motor is not going to last very long. Also the Charlynn style low speed high torque motor is a terrible choice for this application due to the spin down.
     
  9. Bayrat

    Bayrat Well-Known Member

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    So the SkidPro high flow cutter with no case drain and a 6000 Charlynn motor is not a good setup for longevity? Now I am confused, it's touted by so many as the best. Or is the reason because there isn't a case drain? They say it has the check built into the valve body they install at the motor. And you can see a pressure relief in the picture of it. But in their video it does sound as though it goes into a bit of a fit when shut down rather than free wheel as I know the CID does.
    Here's a video:
     
  10. Bayrat

    Bayrat Well-Known Member

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