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Tractor Pulling Discussion Forum

Re: cement pulling

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Author  [Modern View]

10-16-2013 08:03:01

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So once you get it moving why do they stop them right away? And conversely in the couple of youtube videos I watched you don't get much time to try to moverit?

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High Octane

10-16-2013 08:14:58

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 Re: cement pulling in reply to underdog, 10-16-2013 08:03:01  
if your tractor can walk the sled easily, not much chance of it stopping, so they let you go a certain distance. around here, you have 1min of spin time if you cant move it. after the time runs out, either the next driver climbs on, or next tractor hooks up to the sled. imagine cement pulling, like pulling on a sheet of ice. you spin, overpower the tires, or not lift the nose your not going anywhere. its kinda like trying to move a transfer sled, once a pull has been made, n they dont move the weight box back n dont pull it back to the starting line. you hook where the last guy spun out n try to pull the weight from the stopping point. if you catch on to deadweight pulling n get good at it, the skills can help you do better on a transfer sled, at the end of the track.

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10-16-2013 10:49:58

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 Re: cement pulling in reply to High Octane, 10-16-2013 08:14:58  
As to the specifics of the pull at MMOGTA in Oakley MI, as depicted in the pic and vid clip posted yesterday by me, each puller gets 2 30 second attempts at each weight increase. There is an electronic timer, red and green light and buzzer to signal the time. The length/distance of the pull is necessarily limited by the size of the cement slab, so we use a length of rope and tipover device at the back of the sled to indicate a full pull. Since the tractors must drive off the cement between hooks, much of the first attempt is often used up in spinning the tires to warm them and remove dirt/dust for better traction. It is far from simple, meaning that tire size, composition and footprint are vital, and the weight balance is critical as well. Drivers of the A/G John Deeres have learned over the years that body weight shifting, in concert with throttle manipulation allows you to create a lot of up and down motion of the front end, which of course varies the down pressure on the rear wheels in a cyclical manner, hopefully breaking the sled loose for a full pull. At the later stages, the winner may only achieve a few feet or even inches during the time allowed. The sled is returned to it's original position after each attempt, in our case by a fixed winch at the other end of the cement. Hope that helps. FJY

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