Left Front Wheel fell out. 4025 4WD with FEL

[sd455dan]

It seems odd to me that the wheel is supported directly on the splines? Straight splines like that have clearance for a slip fit so there would always be movement between the male and female splines. No matter what bolts they use, it looks like a funky design to me with no bearing directly inboard of the wheel flange.

^^^ agree

no inner bearing??
there almost has to be both an inner and outer bearing.?.

Be interesting to see a parts blow up of the complete assembly

this is not the 1st thread where a front wheel left a 4x4 tractor with axle stub attached and certainly could be a safety concern if it were to happen at an inopportune time, at least it does not seem to be a very common type of failure.

Branson case-
https://www.tractorbynet.com/forums/century-branson/375056-branson-front-wheel-axle-failures.html

Kioti case
https://www.tractorbynet.com/forums...375598-dk40-front-bearing-failure-1300-a.html

interesting threads with good advice on having some rear ballast on board to reduce weight on the front axle also

Hopefully will get the Mahindra fixed and back into operation soon, Kioti to

 

[Jabonee]

My dealer strongly advised against filling the front tires; said it could cause damage to....something in the front end.

DO NOT BALLAST FRONT WHEELS. :shocked:

 

[Jabonee]

Confused. Is this caused by the lug nuts not being properly tightened?

I see this failure fairly often. Usually attributed to running in 4wd on paved or hard surfaces.

 

[radios1]

I thought all tractors had most of their parts made in Japan, S Korea, China, etc., etc., though some are assembled in the U.S. I was told there wasn't a single tractor under 100 HP that was manufactured (not just assembled) in the U.S.

I do appreciate "made in USA" and buy it whenever I can, not because it's always better, but just to support my own country's businesses. Even if it costs more. My business makes a point of sourcing our materials 100% from the U.S. even though it costs more. Just wanted to say all that because I do appreciate the "made in USA" ethic.

of those that are made in Foreign Countries, Some Countries make a better cheap product than others. regarding ALL tractors, John Deere is one Company I Know makes ALL their tractors right here, in the U.S. I'm sure there are others, too, it was back in the '80's that imports started to take over, and the decline of U.S. manufacturing started big time..

 

[radios1]

^^^ agree

no inner bearing??
there almost has to be both an inner and outer bearing.?.

Be interesting to see a parts blow up of the complete assembly

this is not the 1st thread where a front wheel left a 4x4 tractor with axle stub attached and certainly could be a safety concern if it were to happen at an inopportune time, at least it does not seem to be a very common type of failure.

Branson in this case-
https://www.tractorbynet.com/forums/century-branson/375056-branson-front-wheel-axle-failures.html


interesting thread- with good advice on having some rear ballast on board to reduce weight on the front axle also

Hopefully the dealer will get the Mahindra fixed and back into operation soon

a FEL would put MUCH more weight on the front axles, so that should not be used either then..

 

[ThirdMan]

Placing critical bolts that need to be tightened in an inaccessible location is a design problem. How do you know the single large bolt won't also work its way out?

I had taken my rear wheel off and didn't recheck the torque (different tractor). I found out on a hill that only three bolts were left and the wheel was at an angle. Wallowed out the bolt holes. Remember everyone to check those lug nuts!

 

[sd455dan]

a FEL would put MUCH more weight on the front axles, so that should not be used either then..

but,
FEL use is 1 of the main reasons to have a tractor, and ballasting the 3 point ( heavy attachment or weight box) is a good way to reduce the weight on the front axle- especially when the FEL is used at max capacity plus it adds stability by increasing weight and traction of the larger rear wheel tire combo.

As was posted earlier the design concept for this Mahindra is what (seems) odd, (if) the weight is actually being supported on the actual spline interface And the bolts that are threaded into the stub axle especially if they are inaccessible.

Speaking of FEL's, Mahindra uses FEL's on the 4025 that have breakout forces of 4740-4978lbs and full height lift at pin of over 2860lbs. Those are formidable #'s, hopefully the dealer will get the upgraded large single bolt design installed on both sides.

from the pictures it would appear the stub retaining bolts failed from tension / compression and weight loading forces imparted as the wheel rotated.

A large single bolt does appear to be an upgrade.


Any play in the assembly would also seem to magnify the the forces applied to the small bolts.

Wonder if anyone that has had the upgraded single bolt design installed has had any further problems?

 

[radios1]

but,
FEL use is 1 of the main reasons to have a tractor, and ballasting the 3 point ( heavy attachment or weight box) is a good way to reduce the weight on the front axle- especially when the FEL is used at max capacity plus it adds stability by increasing weight and traction of the larger rear wheel tire combo.

As was posted earlier the design concept for this Mahindra is what (seems) odd, (if) the weight is actually being supported on the actual spline interface And the bolts that are threaded into the stub axle especially if they are inaccessible.

Speaking of FEL's, Mahindra uses FEL's on the 4025 that have breakout forces of 4740-4978lbs and full height lift at pin of over 2860lbs. Those are formidable #'s, hopefully the dealer will get the upgraded large single bolt design installed on both sides.

from the pictures it would appear the stub retaining bolts failed from tension / compression and weight loading forces imparted as the wheel rotated.

A large single bolt does appear to be an upgrade.


Any play in the assembly would also seem to magnify the the forces applied to the small bolts.

Wonder if anyone that has had the upgraded single bolt design installed has had any further problems?

what happened to the old tapered axle, and inner and outer roller bearings, that are still used on even VERY large vehicles? one nut to hold that on!..

 

[ruffdog]

what happened to the old tapered axle, and inner and outer roller bearings, that are still used on even VERY large vehicles? one nut to hold that on!..

Too much $$$$? Pinching pennies....

 

[GirlWhoWantsTractor]

....John Deere is one Company I Know makes ALL their tractors right here, in the U.S.

Only 100 HP and up.