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  1. #1
    Veteran Member Gordon Gould's Avatar
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    Apr 2007
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    1,956
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    NorthEastern, VT
    Tractor
    Kubota L3010DT, Dresser TD7G Dozer

    Default I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    I have had my Fit Rite Hydraulics TnT system for about a year. It is a great tool and has really enhanced the
    capability of any of my dirt working impliments. It took me a while to get the knack of making fine adjustments on
    the fly but once I did I was able to a better job easier and faster. Which is more fun.

    I had no flow restrictors in the hydraulic lines to the TnT cylinders. The hydraulic flow rate on my tractor is only
    about 7 GPM. When the tractor was at idle speed the adjustment rate of the two cylinders was pretty reasonable
    and I could control the blade adjustment while using a large range of valve opening, from just cracked open to full open.

    However at work rpm's, I like about 2200 rpm grading on my geared tractor, the adjustment speed of the
    cylinders was very fast because of the increased hydraulic flow at higher rpm. It took a very quick and soft touch on the control levers to be able to make fine adjustments. I used my ears too, listening to the valve for feedback and kind of anticipating when to release the lever. If I watched the blade and released the lever when it looked right I would be to slow and the adjustment would be to big. So I had to release the lever early. It sounds a little hard to do but like any tool you just get the feel of it after a while.

    After seeing some discussion on TnT systems where Brian recommended flow restrictors I decided to try them. They are cheap enough so I had nothing to loose. I put the two restrictors on today. They are small in-line fittings. They add about 1.75 inches to the hose length. I put them between the male quick coupler and the hose end fitting on the line going to the welded end of each of the two TnT cylinders.

    Just for a fun test I tried to put a crown on my packed snow driveway with a rear blade. Just as if it were dirt.

    All I can say is WOW, what a difference. It is just so much nicer to have such positive control. I could actually
    watch the blade move and release the lever when the blade was where I wanted it instead of trying to inticipate where the blade would end up when the valve finally closes. Because the hydraulic flow is restricted to a low level the ram speed of the cylinders is now independent of the engine rpm's. It is nice and slow all the time.

    In hind sight, if I knew how controlable making adjustments with the flow restrictors would be I would have
    never said that I did not feel the need for them. Which I naively believed. I think they are a serious improvement.
    At least in my case.

    This was my experience and I thought I would share it.
    Attached Thumbnails Attached Thumbnails I Added Hydraulic Restrictors to my Top 'n' Tilt Today-tnt1.jpg   I Added Hydraulic Restrictors to my Top 'n' Tilt Today-tnt2.jpg   I Added Hydraulic Restrictors to my Top 'n' Tilt Today-tnt3.jpg   I Added Hydraulic Restrictors to my Top 'n' Tilt Today-tnt4.jpg  
    "If you're not making any mistakes then you're not doing anything"

    L3010DT, Farmi JL290 Winch, ATI Grapple, BearCat 5" Chipper, 6' Rear Blade,
    7' Sickle Bar, 5' Land Plane Grading Scraper, Dresser TD7G Dozer

  2. #2
    Elite Member
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    MtnViewRanch's Avatar
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    Mar 2005
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    6,986
    Location
    4000\' mountains of Southern California
    Tractor
    Mahindra 7520, Mahindra 3215HST, Case 580 extendahoe, Case 310 dozer, Parsons trencher, Cat D6,

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    What I tell people is that yes you can guess as to where it will end up if you don't have the flow restrictors, but with the flow restrictors you can adjust it to where you want it. They usually make such a difference that it is almost hard to believe.
    Brian
    Top and Tilt Kits by Fit Rite Hydraulics

  3. #3
    Platinum Member npalen's Avatar
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    Nov 2009
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    662
    Location
    Beloit, KS
    Tractor
    Kubota B9200 HSTD and Allis 720

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    What orifice diameter are you using? 1/32"? 1/16"

  4. #4
    Elite Member
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    MtnViewRanch's Avatar
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    Mar 2005
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    6,986
    Location
    4000\' mountains of Southern California
    Tractor
    Mahindra 7520, Mahindra 3215HST, Case 580 extendahoe, Case 310 dozer, Parsons trencher, Cat D6,

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    Quote Originally Posted by npalen View Post
    What orifice diameter are you using? 1/32"? 1/16"
    2" dia gets .030
    2 1/2" dia gets .045
    3" dia gets .060
    Brian
    Top and Tilt Kits by Fit Rite Hydraulics

  5. #5
    Bronze Member PandDLong's Avatar
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    Apr 2012
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    76
    Location
    Southern Alberta
    Tractor
    Kubota L3540

    Default

    Thanks for posting of your experiences. I'm about to order my T'n'T and it's very useful to hear of real world use of tools and options.


    Nice place you have there as well.

  6. #6
    Platinum Member npalen's Avatar
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    Beloit, KS
    Tractor
    Kubota B9200 HSTD and Allis 720

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    We used restrictor fittings extensively in the fold systems of tillage and seeding equipment some of which were 60' tillage width and had to fold vertically in several sections to roading width. The rule of thumb was to put the restrictor directly on the cylinder fitting to provide a degree of safety in the event of a malfunction such as a hose burst. The initial purpose of the restrictors in this application was to control the speed as well as the sequence of events during the fold process. Today's larger farm tractors are capable of 30 or 40 and even up to 60 or more gallons per minute of flow at 3000 psi so it's imperative for the manufacturer of the attachments to control that tiger. Many of the tractors have electronically adjustable flow rates but the operator is relied upon to utilize them.
    I can see where the restrictors are very useful for precise adjustment of top and tilt cylinders as Gordon, the OP, demonstrates above.

  7. #7
    jmc
    jmc is offline
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    Jul 2003
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    SW Indiana
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    Ford 1920 4x4 (traded in on Kubota). Case 480F TLB w/4 in 1 bucket, 4x4. Gehl CTL60 tracked loader, Kubota L4330 GST

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    Gordon,

    Thanks for the report on flow restrictors. I'm going to try some. I've got piloted check valves which, I think, aggravates the feathering problem since nothing happens at less than 500 psi.

    OT but have you considered using the adjustable side link (you replaced with the cylinder) on the left side of your tractor to replace the fixed length link? With both sides adjustable, it gives you more tilt. Also, it's difficult to explain, but even if you don't need more tilt, you can raise/lower both sides of your implement back there so that the 3ph lever is in a comfortable position where you use it most. Like when I'm looking over my right shoulder while grading, I can't keep my hand on the 3ph lever if it's down low. By lengthening both side links, the lever now is higher and within reach when the blade is on the ground. Even thou doing this uses up some of your total lift, there's probably still enough.

    John

  8. #8
    Platinum Member BIG DOOLEY's Avatar
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    Aug 2012
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    602
    Location
    MICHIGAN
    Tractor
    JOHN DEERE 2320

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    Thanks for the tips.
    I just modified my rear blade and now have hydraulic angling.
    I'm thinking of modifying a cylinder for side link adjustment for my J. D. 2320.
    My side link is not straight.
    I probably won't have as big of flow issue but I might still want an orifice.
    A VERY beautiful place you have there!
    Tom
    2012 JD 2320, HOMEMADE CANOPY, 54" FRONT BLADE, 54" MID DECK MOWER, HYDRAULIC ANGLE 60" REAR BLADE, QUICK HITCH, STAINLESS FRONT MOUNT SPRAY TANK W/BOOM, 200CX LOADER W/ 61" BUCKET, HOMEMADE BALLAST BOX,HOMEMADE BUCKET GRAPPLE
    1998 "BIG DOOLEY" Chevy K3500 Crew Cab (36.000 miles & counting)

    United Steel Workers Union 12934

  9. #9
    Platinum Member npalen's Avatar
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    Nov 2009
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    662
    Location
    Beloit, KS
    Tractor
    Kubota B9200 HSTD and Allis 720

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    Just to give an idea how fast a cylinder retracts I did the following scenario:
    2" bore cylinder with 1" rod at 10 GPM will move approximately 16"/second.
    (2" bore is 3.14 square inches and 1" rod is .785 square inches leaving 2.355 square inches of area when retracting the rod. 10 GPM is 2310 cubic inches per minute divided by the 2.355 area and then by 60 seconds/minute)
    Briefly feathering or tapping the control valve will, of course, slow the cylinder down.

  10. #10
    Epic Contributor jinman's Avatar
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    Feb 2001
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    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: I Added Hydraulic Restrictors to my Top 'n' Tilt Today

    I'm surprised somebody hasn't also mentioned that you can add an adjustable needle valve to one side of the hydraulic circuit also. The needle valve will give you complete control of flow for any sized cylinder, but is more expensive than the simple orifice. I've also been advised that you should not install an orifice just before a right angle connector. The high pressure jet can actually cut through the fitting. This is hearsay, but comes from Mark Carter of CCM. Frankly, if you are not in a constant flow situation, I think the chance of this being an issue is nil.
    Jim


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