Page 1 of 2 12 LastLast
Results 1 to 10 of 16
  1. #1
    Veteran Member npalen's Avatar
    Join Date
    Nov 2009
    Posts
    1,266
    Location
    Beloit, KS
    Tractor
    Kubota B9200 HSTD and New Holland TC29DA

    Default Dynamic Rear Weight

    A question comes to mind after reading some very interesting threads on adding weight to the 3PH. Would it make sense to build the weight system so that the attachment point of the toplink would cause the weight to tip back when the 3PH is raised? I would envision a fairly tall weight configuration such as, for speaking purposes, a 30 gallon barrel full of whatever. An unusually long top link would cause the tipping action with the advantage being that the weight could be lowered and tilted forward when it is not needed. This would transfer some weight back to the front of the tractor.

  2. #2
    Platinum Member
    Join Date
    Jul 2007
    Posts
    874
    Location
    WV
    Tractor
    John Deere 1026R

    Default

    That would work great if you only drive on a concrete pad. The further it hangs out there the more likely it is to hit something. Members with backhoes will agree. Just buy a hoe :-)

  3. #3
    Veteran Member npalen's Avatar
    Join Date
    Nov 2009
    Posts
    1,266
    Location
    Beloit, KS
    Tractor
    Kubota B9200 HSTD and New Holland TC29DA

    Default Re: Dynamic Rear Weight

    I was thinking that the only time the weight would be "extended" is when it's needed to counterbalance an unusually heavy load in the FEL bucket. The rest of the time it could be left in the "retracted" position for clearance. A hydraulic top link would provide or add to the same effect.

  4. #4
    Platinum Member
    Join Date
    Jul 2007
    Posts
    874
    Location
    WV
    Tractor
    John Deere 1026R

    Default

    Yeah but it would need to swing from side to side if it sticks out that far and you drive on uneven terrain which is why I said a backhoe is a great counterweight.

  5. #5
    Veteran Member npalen's Avatar
    Join Date
    Nov 2009
    Posts
    1,266
    Location
    Beloit, KS
    Tractor
    Kubota B9200 HSTD and New Holland TC29DA

    Default Re: Dynamic Rear Weight

    Yes, I agree that a backhoe is a great counterweight but not everyone has one. I guess a TnT would accomplish the swinging side to side that you mention unless I'm misunderstanding.

  6. #6
    Super Star Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    10,097
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: Dynamic Rear Weight

    I cant see you getting much dynamic force from anything that you could put back there. You are limited by the lifting force of your 3 PH. Then you are limited in the backward offset by the amount of clearance from the ground. You have to be able to pick it up by some amount so it doesnt drag the ground and most 3 PH arms only move 18-24". Allow 4" ground clearance and that only allow 20" of offset behind the pins x 1000 or so in weight and some of that weight will be above the pin and will therefore transmit it weight forward but still behind the wheels so assume 80/20 split so about 800# of dynamic force moving 14-20" behind the pins.
    Any of you engineers want to calculate the additional force that this would apply to the rear wheels? Dont forget to subtract the 20% that is moving in front of the pins so that leverage is then lessened
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  7. #7
    Platinum Member
    Join Date
    Jul 2007
    Posts
    874
    Location
    WV
    Tractor
    John Deere 1026R

    Default

    Just find out where the center of mass is in all positions and multiply the horizontal distance between it and the axle center to find the torque exerted on the tractor regardless of how the counterweight is shaped.

  8. #8
    Platinum Member
    Join Date
    Jul 2007
    Posts
    874
    Location
    WV
    Tractor
    John Deere 1026R

    Default

    Quote Originally Posted by npalen
    Yes, I agree that a backhoe is a great counterweight but not everyone has one. I guess a TnT would accomplish the swinging side to side that you mention unless I'm misunderstanding.
    Yes I agree with both points. If you have tnt though I think the tractor should be big enough to handle a large static counterweight. For my tractor in tight spots I was actually going to go the other way with a much heavier counterweight tucked in between the arms rather than slamming my hoe into everything.

  9. #9
    Super Star Member LD1's Avatar
    Join Date
    Apr 2008
    Posts
    16,420
    Location
    Central Ohio
    Tractor
    Kubota MX5100

    Default Re: Dynamic Rear Weight

    I have to agree with the other posters that it just inst going to create enough of a change to matter.

    The limiting factor is that the lower links are a fixed length and can only raise a given height. And the 3PH raises in an arc. So the higher it raises (normally) the closer the implement comes to the tactor. With a top-heavy weight and a long toplink like you are suggesting, I dont think it will gain anything on the raise. Maybe just enough to offset the the arc travel of the 3PH. Just make the counterweight heavy enough to start with
    ".........there is only one way to find out."
    "Ok, hold my beer and watch this.........."


    MX5100 DIY Remotes
    MX5100 Diverter install
    Front Snow Plow Install

    Ford 5500 Backhoe
    Kubota MX5100HST w/LA844
    2005 Dodge 3500 4x4 Diesel
    8N Rebuilt and restored
    Bushhog 306
    3 Homemade wood hauling trailers
    Dolmar 6400 84cc ported
    Sachs-Dolmar 120SI Ported
    (4) Sachs-Dolmar 116SI Ported
    Dolmar PS540
    Sachs-Dolmar 115i
    Sachs-Dolmar 117
    Sachs-Dolmar 112

  10. #10
    Veteran Member SSdoxie's Avatar
    Join Date
    Jun 2010
    Posts
    2,444
    Location
    Cumberland Plateau, TN
    Tractor
    Bobcat CT225

    Default Re: Dynamic Rear Weight

    Quote Originally Posted by LD1 View Post
    I have to agree with the other posters that it just inst going to create enough of a change to matter.

    The limiting factor is that the lower links are a fixed length and can only raise a given height. And the 3PH raises in an arc. So the higher it raises (normally) the closer the implement comes to the tactor. With a top-heavy weight and a long toplink like you are suggesting, I dont think it will gain anything on the raise. Maybe just enough to offset the the arc travel of the 3PH. Just make the counterweight heavy enough to start with
    I too agree. Plus I think having a top heavy weight like this may add to risk of roll over on a side slope versus working to hold both rear wheels down.
    Dennis

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

Page 1 of 2 12 LastLast

Similar Threads

  1. Dual Brakes on an HST tractor
    By Lockport in forum Owning/Operating
    Replies: 65
    Last Post: 07-06-2011, 11:58 AM
  2. Rear Weight Idea
    By Erik Graham in forum Kubota Owning/Operating
    Replies: 5
    Last Post: 07-02-2007, 08:46 AM
  3. What gives with my front axles
    By 4710and110TLB in forum John Deere Owning/Operating
    Replies: 10
    Last Post: 07-22-2004, 01:59 PM
  4. Ballast Weight of Class II Boomer rear wheel weights
    By Mosey in forum New Holland Owning/Operating
    Replies: 1
    Last Post: 06-19-2003, 10:55 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2017 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.