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  1. #1
    New Member
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    Aug 2011
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    cat 268b

    Default Hydraulic quick couplers

    Has anyone bypassed the couplers and hooked it direct, just wondering if you can gain anymore flow to the head, on a s300 bobcat running a magnum mulcher.

  2. #2
    Gold Member fishfactor's Avatar
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    Aug 2010
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    431
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    Monroe, NC
    Tractor
    (2) 2014 CAT 299DXHP / FECON

    Default Re: Hydraulic quick couplers

    Never have, but I want to. I'm sure you would pick up flow, but more importantly you won't be replacing those expensive couplers all the time. Its on my list, but not the top. If things ever slow down I may get to it.
    No matter what anyone tells you, old fencing, cable, and farm implements that are in the middle of the woods are not your friends!

    Colby
    S & P Land Services

  3. #3
    Platinum Member
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    Jul 2007
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    838
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    S. Central TX Hill Country

    Default Re: Hydraulic quick couplers

    I don't think you will pick up enough flow to justify taking away the versatility of being able to swap attachments. I ran mulchers on two s300's and got 37gpm on the flow meter.
    I couldn't see much more coming through with the couplers bypassed. Without couplers, it would be difficult to hook up a flow meter to test unless you owned one and could modify it's input and output lines.
    Brush Chipping and Tree Mulching Texas Style!

  4. #4
    Veteran Member KennyG's Avatar
    Join Date
    Jan 2011
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    1,194
    Location
    SW Michigan
    Tractor
    John Deere 2320

    Default Re: Hydraulic quick couplers

    With a well designed coupler (which I assume they are), you don't lose much flow capacity. Although the coupler may have a small passage, it isn't very long. The flow loss is related to the velocity squared and the length. If the flow area is reduced to 1/2 the hose size for one inch of flow length in the coupler, the loss could be as small as adding 4 inches of length to the hose. It may not be intuitive, but you will gain a lot more by increasing the diameter of the hoses than eliminating the coupling, unless you are already pump flow limited.

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