Anonymous Poster
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4x4 lead/lag stress on drivetrain...what\'s the dif
Hi,
Gordon referenced the following Firestone information page in another thread:
Firestone General Farm Tire Information
It is an interesting read. Here is a quote that I don't understand the reasoning behind.
<font color="blue"> But no amount of lag is acceptable. That’s because a lag condition puts excessive strain on the tractor’s transfer case, and it causes the front tires to wear out more quickly than they would under normal operating conditions.
</font>
Why would a lag situation put more strain on the front drivetrain than a lead situation, if the percent lead/lag being compared were equal?
Seems like the gears and other drive train components would feel the same stress/strain in eithe case, just in the opposite direction.
I can understand that overspeeding the front tires would help in control of the tractor...but am having trouble seeing how the gear train would like lead over lag, or lag over lead, as far as excessive strain goes... /forums/images/graemlins/confused.gif
In my mind, in a lead condition the front tires would try to drag the rear wheels over the ground...and in a lag condtion the rear wheels would try to force the front tires over the ground...
Wouldn't the drive train be stressed equally in both cases, but just in an opposite manner?
What's the fine [or corse] point I'm missing here? Might it have something to do with the tire tread slipping easier in one direction than the other? Doesn't seem like that would be it... /forums/images/graemlins/confused.gif
Hi,
Gordon referenced the following Firestone information page in another thread:
Firestone General Farm Tire Information
It is an interesting read. Here is a quote that I don't understand the reasoning behind.
<font color="blue"> But no amount of lag is acceptable. That’s because a lag condition puts excessive strain on the tractor’s transfer case, and it causes the front tires to wear out more quickly than they would under normal operating conditions.
</font>
Why would a lag situation put more strain on the front drivetrain than a lead situation, if the percent lead/lag being compared were equal?
Seems like the gears and other drive train components would feel the same stress/strain in eithe case, just in the opposite direction.
I can understand that overspeeding the front tires would help in control of the tractor...but am having trouble seeing how the gear train would like lead over lag, or lag over lead, as far as excessive strain goes... /forums/images/graemlins/confused.gif
In my mind, in a lead condition the front tires would try to drag the rear wheels over the ground...and in a lag condtion the rear wheels would try to force the front tires over the ground...
Wouldn't the drive train be stressed equally in both cases, but just in an opposite manner?
What's the fine [or corse] point I'm missing here? Might it have something to do with the tire tread slipping easier in one direction than the other? Doesn't seem like that would be it... /forums/images/graemlins/confused.gif