any physics experts out there?
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=122293
Printed Date: 07 Sep 2025 at 8:48am
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Topic: any physics experts out there?
Posted By: alan-nj
Subject: any physics experts out there?
Date Posted: 22 Apr 2016 at 6:16pm
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is there any difference or advantage in traction gained in operating with the counterweight all the way up.....or down?? .  .  ------------- If ignorance is bliss, than happy days are here again. |
Replies:
Posted By: DiyDave
Date Posted: 22 Apr 2016 at 6:22pm
Stability yes, traction, I don't know...
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Posted By: Orange Blood
Date Posted: 22 Apr 2016 at 6:26pm
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Looks to me like when the weight is full up, the distance from the fulcrum (pivot point = front wheels) is reduced by a few inches. This reduction in distance means it will take less weight in the bucket to tip the tractor up on the front wheels. Now this is all dependent on the loader being able to lift in excess of the lesser weight. ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: JoeO(CMO)
Date Posted: 22 Apr 2016 at 7:06pm
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Keep the center of gravity low ------------- |
Posted By: TramwayGuy
Date Posted: 22 Apr 2016 at 7:31pm
| The lower positon puts the mass further back and also keeps the center of gravity lower. So unless you have issues with clearance above the ground, keep it low. |
Posted By: Dan73
Date Posted: 22 Apr 2016 at 9:20pm
| Load the tires and take the weight odd the wheel bearing. Wheel weight is alot easier on the tractor then counter weight. But yes keep the weight as low as you can at all times. Keep the loader bucket low when moving will help the most. |
Posted By: slowzuki
Date Posted: 22 Apr 2016 at 9:32pm
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Using a hitch counterweight is the only way to take weight off the front axle which is usually the one damaged with loaders. The rear axle can handle a counter weight fine.
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Dan73 wrote:Posted By: 427435
Date Posted: 23 Apr 2016 at 12:01am
The rear counter weight does not decrease the load on the front wheels. It does improve stability. ------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |
Posted By: Gary Burnett
Date Posted: 23 Apr 2016 at 1:03am
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I'd say the rear counterweight does take weight off the front wheels and if you have a heavy enough rear counterweight it'll take all the weight off the front wheels and rear up. Done it lots of times lifting things with a boom pole. |
Posted By: Dan73
Date Posted: 23 Apr 2016 at 3:43am
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Too much counter weight out the back will only allow you to overload the tractor to the point where you break everything the front end is not exempt from the load if you have a big counter weight yes you can pick it up off the ground with a big lever arm but it only slams down all the harder when you move it forward or the bucket comes down past center. Mark is right you don't really remove weight from the front wheels. I rebuilt a d15 with a ts500 loader that the PO had a 2000 pound counter weight on. I kid you not I weighted the counter weight after removing it. All that weight didn't protect the front end it just allowed them to destroy both the rear wheel bearing along with the front spindles both left and right plus the center counter weight support bearings it turned out. Just found that last set when the power steering leaked everwhere. So in my experience no counterweight doesn't remove weight from the front end and protect it from abuse any benefit you see in the balancing game is more then offset by the slamming force when all that weight shifts forward in a bounce or going down a hill. Wheel weight is not carried by the rear wheel bearings it is just sitting on the ground and the bearings just see the actual load from the weight in the bucket trying to lift up on the rear tires. With a counter weight the rear wheel bearing have to transfer all the weight to the ground. And in a bounce the counter weight force is will cause the front end to take more abusive point loads than you see with wheel weights. |
Posted By: Tony Elo
Date Posted: 23 Apr 2016 at 8:44am
| While on this topic, is there any advantage to lean back in the seat all the way when tractor pulling? Makes me chuckle every time I see that before they spin out |
Posted By: CTuckerNWIL
Date Posted: 23 Apr 2016 at 8:49am
Very little if you lean back past the center-line of the axle. I've seen that too, but the advantage is very minimal. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: CTuckerNWIL
Date Posted: 23 Apr 2016 at 9:28am
The tractor can be considered a lever, the back axle is the fulcrum. Anytime you add downward force to one end of the lever, the other end will have less load on it depending on the location of the fulcrum to the downward force and the "weight" on the other end. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: LeonR2013
Date Posted: 23 Apr 2016 at 9:52am
| Dan, I always called what you describe, the farmer syndrome. Load it until it breaks and then take one off. To late of course, but we got to pick up the pieces. Leon R Cmo |
Posted By: Dan73
Date Posted: 23 Apr 2016 at 10:05am
Probably depends on bow much the operator weights compared to the tractor... |
Posted By: 427435
Date Posted: 23 Apr 2016 at 11:54am
You are correct. My bad. That's what I get for posting late at night.  ------------- Mark B10 Allis, 917 Allis, 7116 Simplicity, 7790 Simplicity Diesel, GTH-L Simplicity Ignorance is curable-----stupidity is not. |