RoyJackson
Rest in Peace
- Joined
- Nov 17, 2001
- Messages
- 24,890
- Location
- Bethel, Vermont
- Tractor
- John Deere 4052R Cab,, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements
I agree that we'll disagree.
The only way to hit the stop is to 1) drive across uneven ground or 2) start a roll. No matter how steep the slope, if the slope is flat (like a 1/2 open hardback book cover) then you'll be dead center on the front pivot - equidistant from both stops.
So no, you don't roll on every slope because you don't hit the stop on every slope. I was responding to someone earlier who talked about the front axle stop arresting a roll - and my point is that once a roll has started because of the usual reasons*, it's rare that the front stop arrests the roll.
*usual reasons include - hole, bump, sudden turn, load shift, etc. All of these things lead to a sudden change in the stability of the tractor. Rolling because you just flat out exceeded the tilt limitations without turning, hitting a low spot or high spot is pretty rare, IMHO.
Think about your statement...
Now, you have an axle that pivots a few degees (I'm not talking about steering) perpendicular to the longitudinal axis of the tractor. What is the weight of the tractor going to do as you start across the slope? The solid rear axle is going to resist any twisting movement, but there is some (enough to cause the front axle to pivot to it's limits (stops) if the slope is steep enough).
Unless you hit the abrupt change in the ground as you enter the slope, the axle is already at it's limits...any effect (the weight shift described in my previous post) has already occurred.
Now, how much slope would it take to overcome the resistance to twist provided by the rear axle? That's going to depend on the design and materials of the tractor and the degree of slope.
That would be a very interesting calculation, but I doubt any one here has the parameters required to calculate it...even in a static setting (tilt table, for example). That math might be in that ANSI spec the tractor manufacturers test to, but the materials, design etc. would be variables the manufacturer would have to provide.