Front Tire cupping

[RickB]

Even the dealer said it would do it to both tires (just more on the right), so I'm not convenience yet. If this was the case then to me a real bad design. The tire is about worn out when it gets to about 50 % on one side. So at 50% wear you have to buy 2 tires because one is worn out and the other has half its life left.

It is not a bad design because many MFD tractors do exactly the same thing. I have seen many discussions on mainstream AG fourums over the couple decades I have been a participant, and discussions with customers and owners in more than two decades as a dealership employee. If toe-in is within spec and there is no bent rim or disc the wear is caused by road wear, specifically on country roads with high crowns and gravel, stones and other loose aggregate at the edge of the pavement where tractor drivers tend to put the right hand tires. Believe it or not, take it or leave it.

 

[kthompson]

You probably have looked to see if the tires are same brand, size and load rating but if not do so. If not the same may be the issue or at least gives indication the odd tire was swapped. I have a four wheel drive JD little larger looking than your tractor with ag tires and have fair amount of roading on it and my front tires have worn very equally. May be different on your Kubota, my Kubota is 2 wheel drive so rib tires on the front. The concept of making hard turns with loaded bucket to the left is interesting.

 

[AllDodge]

Believe it or not, take it or leave it.

That is the case

You probably have looked to see if the tires are same brand, size and load rating but if not do so.

Did look but not real close to compair

 

[ovrszd]

It is truly a mystery. With that said. I'd use it.

 

[kthompson]

You probably have looked to see if the tires are same brand, size and load rating but if not do so.

Did look but not real close to compare.


It is a four wheel drive tractor and you do need to have same size tires on an axle. I would look to be sure tires are same, front wheels both are turning freely and both pulling. You don't want different stress on the two tires.

 

[AllDodge]

Checked the tires and they are 12.4R24 Titan radials and do not have fluid in the front. The rear do have fluid so at least the guy that sold it to me was half right.

Currently cannot start it because I removed the upper radiator hose is leaking, small split in the middle. Prior to the hose removal I raised the front end off the ground and tried to rotate and check for play. Was able to rotate the wheel a little and rocked it some to check for play, and found none

 

[zzvyb6]

Look, when you get around to running it again, run a couple of simple engineering tests.

Use your GPS and a stop watch to measure the coast down time in 2wd and 4wd. Run it up to a decent speed and shift into neutral. Measure the time it takes to come to a complete stop. If there is a substantial difference in coast-down times (like 2:1) you may have a front/rear tire radius differential that's very big. Yes the 4w driveline friction will make somewhat of a difference. but try dropping some front air pressure from an over inflation setting and repeat until you get the best (smallest) difference.

If you can drive on a clean concrete road of long driveway, drive it straight ahead and after a distance, look at the tires to see if they have dark black bands at the edge(s). This tells us that there is indeed some scuffing going on that's wearing the tread.

This will give the propeller heads here something to squawk about for a few days.

 

[ovrszd]

Scuff won't wear just one tire. That's the point of concern. Why is one tire wearing so much different tban the other?

 

[Oldoak]

Scuff won't wear just one tire. That's the point of concern. Why is one tire wearing so much different than the other?

That is the point of this whole thread.

A lot of different opinions and suggestions but no definitive answer...................yet. :confused3:

 

[RickB]

That is the point of this whole thread.

A lot of different opinions and suggestions but no definitive answer...................yet. :confused3:

There is one detailed logical explanation. Not disputed or discussed, mostly ignored.

 

[Oldoak]

There is one detailed logical explanation. Not disputed or discussed, mostly ignored.

Perhaps because not many are convinced that it is in fact the cause of the O. P. problem.

 

[RickB]

Perhaps because not many are convinced that it is in fact the cause of the O. P. problem.

They will be tilting at windmills for a while. This is not a new or unique phenomenon. It may be a new discussion here but TBN does not attract a majority of mainstream Ag where this type of complaint is more common. There are a very few front axle and wheel adjustments and inspections to be made, if they are all good it is going to be roading on specific types of surfaces that created the wear. The OP cannot say one way or another because he recently purchased the tractor.

 

[AllDodge]

This is what is so great about forums, everyone gets to post an opinion, and everyone gets to take it or leave it. Its all good and not hurting anyone.

No hurry, have plenty of time to work on it

 

[RickB]

This is what is so great about forums, everyone gets to post an opinion, and everyone gets to take it or leave it. Its all good and not hurting anyone.

No hurry, have plenty of time to work on it

Yessir

 

[Oldoak]

This is what is so great about forums, everyone gets to post an opinion, and everyone gets to take it or leave it. Its all good and not hurting anyone.

No hurry, have plenty of time to work on it

Exactly! And until if/when the O.P. finds out what the actual cause of the unusual right front tire wear was and reports back, no one will know for certain.

 

[kthompson]

I stood in front of my four wheel drive JD today thinking about this thread and looked very carefully at the tires. They are probably have about 50% tread on them but the tires show no cupping or uneven wearing and by eye site the amount of wear looked the same. I have looked back at the pictures as carefully as I can and my first view of them was the right front tire was cupping but don't think that is correct. Believe the front tires are being run with too high air pressure in them on hard surface road.

Verify the pressure in those tires.

 

[AllDodge]

Verify the pressure in those tires.

Will do

 

[AllDodge]

28*F
Right 18 psi
Left 19.5 psi

Toe in between 3/8 to 7/16 using boards on outside of wheels

 

[AllDodge]

Tried to get an idea of the camber angle and seems the right side has a bit more then the left, and is compounded from the left tire being lower pressure. This could be correct due to crown of the road. Unable to get a angle on the hub but will remove the wheel after I get the motor running again and check on the hubs

 

[RickB]

28*F
Right 18 psi
Left 19.5 psi

Toe in between 3/8 to 7/16 using boards on outside of wheels

Way, way too much toe in for any MFD axle.