Getting a acurate pulling weight?
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Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=130400
Printed Date: 24 Nov 2024 at 8:57am
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Topic: Getting a acurate pulling weight?
Posted By: Ken in Texas
Subject: Getting a acurate pulling weight?
Date Posted: 24 Oct 2016 at 5:27pm
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Our club scales that weigh the whole tractor began to have accuracy problems right from the git go at last springs show and pull. We were asked to go on with the pull using the honor system being most pullers know what class they are weighted to pull in without going over a scale. Well, here it is time again for the BIGGIE. The LA State Fair pull in Shreveport this Friday and Saturday. The estimated cost to REPAIR & recalibrate the club scale was close to 5 grand and was not in the budget anytime soon. So. A north LA club is bringing their scale to Shreveport so we have a scale. A small scale where you weigh the front axle first then the rear axle and add the two readings together and by some vodo math get a accurate gross pulling weight for all tractors coming across the scales. Tell me what you know about weighing the front and the rear and adding them up as far as accuracy goes across the board for tractors weighing #3000 up to #12000 |
Replies:
Posted By: DiyDave
Date Posted: 24 Oct 2016 at 5:56pm
It works for the state police, when they catch you on the side of the hwy...
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Posted By: Sugarmaker
Date Posted: 24 Oct 2016 at 6:48pm
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Wow! That sounds like a lot to get the scales re calibrated? Regards, Chris ------------- D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet. |
Posted By: Dans 7080
Date Posted: 24 Oct 2016 at 9:09pm
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I've been going through this at work. Think of it this way. If you weigh 200lbs and stand on two scales one leg on each one. You might have 90lbs on one leg and 110lbs on the other. Either way itl total 200lbs. Split weighing works. Although hard to explain at times its a simple concept. If it didn't work how can DOT weigh a semi on 10 seperate scales and get an accurate weight. ------------- When someone tells you Nothings Impossible, Tell them to slam a revolving door |
Posted By: Allis dave
Date Posted: 25 Oct 2016 at 6:49am
| Scales are expensive. A new semi truck scale is about $70k |
Posted By: Charlie175
Date Posted: 25 Oct 2016 at 7:10am
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All I know is that pulls at different locations never weigh the same. Some vary by 300 lbs. ------------- Charlie '48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD |
Posted By: Ken in Texas
Date Posted: 26 Oct 2016 at 9:06am
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Guys. What the DOT is interested in is overloading a axle beyond its rated capacity not the gross weight of the entire truck and contents. I played with my bathroom scale that weighs me at 202.4. Laying out flat facing down with both hands on the scale toes on the floor I have 120.8. Toes on the scale hands on the ground 51.4. Added together that is 172.2. So much for weighing myself top half and bottom half separate and getting close to a correct total. VODO Math When our clubs whole tractor scale was working my weight matched my weight on a certified scale ticket |
Posted By: PaulB
Date Posted: 26 Oct 2016 at 10:16am
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I have much experience of the roadside D.O.T. Scales. what they're counting on is to not dispute what they weigh you at. I have beaten the roadside ticket many times but either having a certified weigh ticket either when I've loaded or shortly after getting stopped. and showing that to the judge. The few times when I'd known they were hitting hard in the area and gotten the certified ticked earlier, I never mentioned this to the officers writing the ticket. When asked by the judge why I didn't show this to the officers at the scene, my reply was they only wanted to see the shippers B/L. They really turned beet red when the found out I knew I was legal to begin with. It didn't take too long for them to leave me alone after having to show up in court a few times, only to have the judge throw out the tickets. So the short answer is split weighing only kinda works. To be anywhere near correct everything must be on a level surface, with not difference in the tops of the different scales. Ken; Try standing with one foot each on two identical scales that are calibrated identical.
------------- If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY |
Posted By: WF owner
Date Posted: 26 Oct 2016 at 10:56am
| The nice thing about split weighing is it's easy to see how much moving weights around effects front / rear end weight. I was shocked to see how much placing the weights behind the rear wheels (instead of placing them just ahead) changed the front end weight. |
Posted By: Tbone95
Date Posted: 26 Oct 2016 at 11:26am
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As long as the tractor remains level between the weighings, it's perfectly accurate. Ken's bathroom scale example is not level weighing and not the best scale in the world. |
Posted By: WF owner
Date Posted: 26 Oct 2016 at 4:20pm
| A person or animal can shift their weight from one foot to another on a scale. A vehicle does not have that ability. |
Posted By: cwhit
Date Posted: 26 Oct 2016 at 6:48pm
| As long as ALL pullers use the same scale, then it's about as accurate as you can get. |
Posted By: bradley6874
Date Posted: 26 Oct 2016 at 7:26pm
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I weigh mine seperate front and combined all the time keep track percentages front to rear and total all the time most of the time it dosent add up I think its due to scale height the higher they are from ground level the farther they are off if your worried about it take a regular (non pulling tractor) take it to a certified scale and weight it then take it to the pull weigh it there and adjust classes to suit keep the tractor around an check the scale periodically durring the pull like stated if every body uses the same scale who cares you are all the same weight ------------- You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul |
Posted By: Brampton 02 gt
Date Posted: 26 Oct 2016 at 8:48pm
I have found that these scales were not that accurate as I added more weight to the rear the front got lighter and when they did the calc I wasn't getting heavier according to the math. |
WF owner wrote:Posted By: Ken in Texas
Date Posted: 27 Oct 2016 at 1:54pm
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I finally got my CA's weight and balance set to work well in 3500, 4000 and 4500 just by adding 500 lbs of suitcases to 3500 and another 500 lbs to 4000. This was worked out by weighing the whole tractor. No telling now what the calculated weight will be weighing front and rear axles separate. The CALCULATED weight is the class you pull in along with everybody else. If my calculated weight adds up to 3300 I need 200 more pounds someplace where it will do the most good to be competitive in 3500 |