Tires Front tires tow in/out and how much?

[SPYDERLK]

larry.. Relax

I guess some people get annoyed when other people do not accurately address what was said while at the same time using extraneous truths to disagree. I am one of the former, and try not to do the latter. I explained in my post [2nd one I think] that the outer wheel turn angle is not necessarily affected by toe out. It depends on whether the turn stop is in front or behind the pivot. Further, I only suspect toe out with the wheels straight would improve maneuverability, not straight line handling. Toe out with the wheels turned is a necessity for responsive turning. The steering arms design orientation wrt the pivot should ensure the correct amount to get the fronts to run in concentric circles with no scrubbing at all turn angles. If they dont accentuate toe out enuf in turns, augmentation by introducing initial moderate toe out in the straight position could help more than it hurts.
larry

 

[RickB]

I guess some people get annoyed when other people do not accurately address what was said while at the same time using extraneous truths to disagree. I am one of the former, and try not to do the latter. I explained in my post [2nd one I think] that the outer wheel turn angle is not necessarily affected by toe out. It depends on whether the turn stop is in front or behind the pivot. Further, I only suspect toe out with the wheels straight would improve maneuverability, not straight line handling. Toe out with the wheels turned is a necessity for responsive turning. The steering arms design orientation wrt the pivot should ensure the correct amount to get the fronts to run in concentric circles with no scrubbing at all turn angles. If they dont accentuate toe out enuf in turns, augmentation by introducing initial moderate toe out in the straight position could help more than it hurts.
larry

That concept is called 'Ackerman' and it has nothing to do with toe in or toe out. Ackerman is a function of the length and angularity of the steering arms fixed to the spindles. My subscription to Speedway Illustrated has not been for naught...

 

[3RRL]

My tractor specs toe-in to be 10mm, or just over 3/8".

 

[KennyV]

That concept is called 'Ackerman'

RickB I have to agree, I think that may be the principal larry is thinking of... (excuse me if that is not what you were in reference to larry).

I had not really considered pro/anti ackermann or pos/neg camber on a tractor, but I think I have an idea of the best set up for making a lot of left turns...
now if only I could make my tractor a LOT faster and give it independent suspension with adjustable geometry... well maybe NOT... lol I can get into enough trouble at normal mowing speeds.

3RRL.. I believe my L4200 is also 10mm in. KennyV

 

[SPYDERLK]

That concept is called 'Ackerman' and it has nothing to do with toe in or toe out. Ackerman is a function of the length and angularity of the steering arms fixed to the spindles. My subscription to Speedway Illustrated has not been for naught...

Lets see; #) divan, sofa, chair, #) Ackerman, [dynamic] toe out, #) peaches, cream, #) etc. ... Are you nuts, bolts?
larry

 

[RickB]

Lets see; #) divan, sofa, chair, #) Ackerman, [dynamic] toe out, #) peaches, cream, #) etc. ... Are you nuts, bolts?
larry

Changing the toe setting and changing Ackerman are separate adjustments. Is that more acceptable?

 

[sevilla]

I tried to set the toe in to ~1/4" as specified by the manual for my Kubota L3830.
I have one question: what if the toe in is reached by turning only one of the two wheels?

 

[SPYDERLK]

I tried to set the toe in to ~1/4" as specified by the manual for my Kubota L3830.
I have one question: what if the toe in is reached by turning only one of the two wheels?

no problem. You will notice a slight difference in steering wheel position unless its hydrostatic PS. .... In which case steering wheel position is random anyway cuz it isnt a direct mechanical connection.
larry

 

[sevilla]

no problem. You will notice a slight difference in steering wheel position unless its hydrostatic PS. .... In which case steering wheel position is random anyway cuz it isnt a direct mechanical connection.
larry

Thank you.

 

[RickB]

Wander is dictated more by caster than anything else. "Neutral toe" is the right idea. Toe is set in so that when a vehicle is moving forward, things tend to compress so that a neutral toe is achieved. On a car or truck, think of those rubber bushings and what they do.

Ackerman was also finally mentioned. That takes care of the turning circles. Throw in different tires, caster and camber and you have a real mess. Front ends are a real ball to design, and they are never perfect.

Caster is not an adjustment achievable on the average tractor. Toe out will create wandering. BTDT.