Tires Front tire angles

[scottgze]

Thanks mate!

 

[Gary Fowler]

When have you ever seen anything that specifies an inch or more of toe in?

You should be pretty safe with zero to an 1/8". The tractor will never be traveling fast enough for toe in to affect the steering effort.

In road racing we set the front steering angle to have a little toe out to make a car turn in better. But we also have unusual camber and caster settings.

All of the check points suggested by Cougsfan are valid.

I would work it in this order.
Park on level surface.
Check tire pressures.
Check tire diameters.
Check wheel bearings.
Check king pins.
Check toe.
Check camber if it concerns you but Like was mentioned I don't know how you could fix it unless something is bent or worn.

You obviously have not looked at typical tractor toe in. That is not too much toe in. If you measure the distance between the two front tires on a utility tractor that has 15-16" rims then add the tire diameter you are going to have 30" or more in diameter. So 1/2" on each side between the front of the tire and the back is really not much toe in for a tractor. 4WD tractors wont have as much as 2 WD. The toe in helps keep the tires from skidding in a turn so you wont need the brake for turning as much. A 0 toe in tire will just skid in a turn plus it is much harder to turn if you dont have power steering like many of the old tractor.

Note: My little B26 Kubota has 3/4" toe in and my LS which has tires twice the diameter has almost 1.5" of toe in. Toe in measured from center of tread to center of tread in front and again in back at about axle height.

 

[ovrszd]

With my limited understanding being considered.... Toe-in does nothing to help a vehicle turn corners. That's caster's job.

Toe-in's job is to control scuff and to make the vehicle steer predictably.

 

[Gary Fowler]

With my limited understanding being considered.... Toe-in does nothing to help a vehicle turn corners. That's caster's job.

Toe-in's job is to control scuff and to make the vehicle steer predictably.

Combine caster and toe in to make the tires on a tractor dig into the dirt rather than slide. It is somewhat different for cars since they are mostly used on hard surfaces and you cant put too much toe-in or castor in them without drastically affecting the wear rate on the tires. Since you dont really have to content much with scuff as you call it on a tractor tire that would wear the tread prematurely if it travelled extensively on concrete or asphalt, you can get more caster and more toe-in on the tire so it turns the tractor more easily in soil conditions rather than just sliding similar to what a car does when you try to turn the wheel on a slippery surface like muddy road.

 

[ovrszd]

Combine caster and toe in to make the tires on a tractor dig into the dirt rather than slide. It is somewhat different for cars since they are mostly used on hard surfaces and you cant put too much toe-in or castor in them without drastically affecting the wear rate on the tires. Since you dont really have to content much with scuff as you call it on a tractor tire that would wear the tread prematurely if it travelled extensively on concrete or asphalt, you can get more caster and more toe-in on the tire so it turns the tractor more easily in soil conditions rather than just sliding similar to what a car does when you try to turn the wheel on a slippery surface like muddy road.

Please explain how toe in can help with turns? What difference would be noticed between 1/2" or 3/4" toe in?

Now camber, that's a whole different effect.

And caster, well now we're gettin somewhere!!!

 

[TractorGuy]

You obviously have not looked at typical tractor toe in. That is not too much toe in. If you measure the distance between the two front tires on a utility tractor that has 15-16" rims then add the tire diameter you are going to have 30" or more in diameter. So 1/2" on each side between the front of the tire and the back is really not much toe in for a tractor. 4WD tractors wont have as much as 2 WD. The toe in helps keep the tires from skidding in a turn so you wont need the brake for turning as much. A 0 toe in tire will just skid in a turn plus it is much harder to turn if you dont have power steering like many of the old tractor.

Note: My little B26 Kubota has 3/4" toe in and my LS which has tires twice the diameter has almost 1.5" of toe in. Toe in measured from center of tread to center of tread in front and again in back at about axle height.

So nevermind that I based my post on actual specifications? Because YOUR tractors have extreme settings that's what other tractors should be?

 

[scottgze]

So guys, I still have no clue what to do, and all I'm seeing is bickering. Not a good look for a noob to your forum.
I'm going elsewhere.

 

[ovrszd]

So guys, I still have no clue what to do, and all I'm seeing is bickering. Not a good look for a noob to your forum.
I'm going elsewhere.

What is actually happening is the exchange of ideas based on experience and specific data. Common on all forums.

Sorry to see you go.

 

[TractorGuy]

So guys, I still have no clue what to do, and all I'm seeing is bickering. Not a good look for a noob to your forum.
I'm going elsewhere.

Apparently you did not read any of the attempts to help you. I took the time to look up the service manual for your machine and converted it to searchable text so I could find pertinent information regarding your concerns. I supplied you with a link to the manual and gave you instructions on how to convert it and make it more usable. Then I posted the actual specification for your front end angles and copied the text on how to adjust the toe in.

I normally try to be polite and avoid confrontation on forums but the internet is fraught with misinformation.

I am 67 years old and have been around machinery all my life. I was figuring out how to make our old Farmall tractor and Dodge truck run when I was 15. I spent 25+ years as a certified Master auto tech and another 20 years as a machinist. When I see someone make a claim I feel is totally useless and may harm someones equipment I have to question it.

 

[zzvyb6]

A toe-in setting is park of Ackermann Steering geometry. Because the front axle has non-zero width, the inner wheel turns at a different radius as the outer wheel, so the toe-in setting is a crutch for a dual tie-rod geometry that would normally handle this issue but doesn't package on a a tractor with a single tie-rod and a drag-link.

Now go back and read my post on why the camber is set to this way. This seems to be a problem with many threads here: Nobody reads the accurate comments posted early and then they start the ex-spurting based on who-knows-what.

I wonder if this is a problem caused by the smart phone app. It's too much trouble to pan thru the details, so they just jump in where they feel like it.