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  1. #1
    New Member RedDogRacing's Avatar
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    south central kentucky
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    L3940

    Default L3940 kubota where is pressure relief valve?

    i have everything i need to adjust the hydraulic pressure. I am at home one day out of 40, and i can not find the bolt to remove to add the shims. ANy HELP.
    Brand new L3940

  2. #2
    Super Star Member J_J's Avatar
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    Sep 2003
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    16,428
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    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: L3940 kubota where is pressure relief valve?

    It is either on the FEL valve or on the hyd block.

    Soon as I get the hyd diagram from Messicks I can tell you more.

    230 - relief valve


    155 - shims
    Attached Thumbnails Attached Thumbnails -l3940-relief-png   -shim-png  
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  3. #3
    New Member RedDogRacing's Avatar
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    south central kentucky
    Tractor
    L3940

    Default Re: L3940 kubota where is pressure relief valve?

    I will look again. I saw the valve and the two longer pieces that come off the bottom. can not find a plug or bolt that is not connected to a line via banjo fitting.

    I see where some pople hook a vacuum to the filler neck is that really nessecary if i have everything ready for an out and right back in?

  4. #4
    Super Star Member J_J's Avatar
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    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: L3940 kubota where is pressure relief valve?

    It is the large hex bolt below the right work port.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  5. #5
    New Member RedDogRacing's Avatar
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    south central kentucky
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    L3940

    Default Re: L3940 kubota where is pressure relief valve?

    ok I found it btw. The valvle that you posted a pic of is located on the right side under the 3pt lift adjustment, behind the right rear tire, roughly above the center of axle.

    to orient the pic that you posted, it is made from a perspective if you where standing on the left side of the tractor near the floor board, looking to the right rear of the tractor.

    I will post pics when I get home, just in case anyone else looks at this later.

    I will also add nubers when i pressure test.

  6. #6
    Gold Member The Fred's Avatar
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    Jun 2013
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    462
    Location
    hOOterville
    Tractor
    L3940 Turbota with a hairdryer

    Default Re: L3940 kubota where is pressure relief valve?

    How about those pix? I'm in the same predicament as you.
    Actually I am very let down by this machines lack of performance but will reserve judgment until I have it for 6 months.
    Will test pressure tonight.
    Fred

  7. #7
    New Member RedDogRacing's Avatar
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    south central kentucky
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    L3940

    Default Re: L3940 kubota where is pressure relief valve?

    Sorry about that I have yet to buy the stuff to do a pressure check, so i put things off. The image in above post shows the block. The shim is itme 150 and 155. That pic is as if you were about to mount your tractor from the left side, and you are looking at the center of the right rear tire.

    Id you crawl under your tractor it is near the axle behind(inside) the right rear tier. We have the same tractor here at work, i will try to remember to shhot pic in the morning. My tractor is at home which is 3 hours away

  8. #8
    New Member RedDogRacing's Avatar
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    south central kentucky
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    L3940

    Default Re: L3940 kubota where is pressure relief valve?

    -img_1393-jpg-img_1394-jpg-img_1395-jpg-img_1397-jpg-img_1398-jpg

  9. #9
    New Member RedDogRacing's Avatar
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    south central kentucky
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    L3940

    Default Re: L3940 kubota where is pressure relief valve?

    the first three pic i just zoomed in on the same area. the last two are from under neth looking up. the front is to the right, the rear to the left, and the camera is looking straight up near the right rear tire.

    now i have not taken mine apart, but as far as i can tell that is the place

  10. #10
    Gold Member The Fred's Avatar
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    hOOterville
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    L3940 Turbota with a hairdryer

    Default Re: L3940 kubota where is pressure relief valve?

    So I added 1 washer .050" and brought the pressure up to 2950 psi; a 400 psi increase at 2600 RPM.
    Still would not lift this 1900 lbs. pallet I needed it for.

    Fred...yes the Kioti dealer emailed today asking why I bought the kubota and not his DK45......good question.

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