M7040 How wide can front tires go?

[wbuffetjr1]

I tried the search function and the manual and still could not find an answer for myself.

With heavy FEL work am I allowed to go to this widest setting on the front tires? To my untrained eye, it just looks like it could be a problem. Going to be running the tractor in the Colorado mountains so I would like it as wide as possible if the tractor can handle it. Front tires are foam filled. Backs are liquid filled.

Thanks in advance for the input!

 

[Tractor Dell]

I tried the search function and the manual and still could not find an answer for myself.

With heavy FEL work am I allowed to go to this widest setting on the front tires? To my untrained eye, it just looks like it could be a problem. Going to be running the tractor in the Colorado mountains so I would like it as wide as possible if the tractor can handle it. Front tires are foam filled. Backs are liquid filled.

Thanks in advance for the input!

Does the width of the front tires even help, seeing how they are on a pivot? Not sure, so just asking.

 

[oosik]

OK - here's the official word from the M5040, M6040 & M7040 Operators Manual. For the 4WD tractors there are ONLY TWO approved FRONT wheel/tire settings. BOTH are with the center DISHED IN - NOT DISHED OUT, as in post #1. The the rim is set either inside the center or outside the center.

I'm going to try to make a copy of the page and attach it to this post.View attachment 547992

Ok - the crap and pictures on the left side of the scanned page are for 2WD - so forget that stuff. What we are interested in is the right hand side of the scanned page. By Golly - that came thru OK.

JMHO - but I think with the centers dished out it just might put too much strain on the bearings and drop axle.

 

[ovrszd]

I agree. I wouldn't run the dish out if it's not recommended by the manufacturer. You might get along fine. Might not.

As Dell pointed out, widening the front tread width does very little for stability. By the time the front axle oscillator has reached it's maximum tilt to allow the wider front tires to assist with stability one of your rear tires will be so far off the ground you will have long since abandoned whatever you were doing to cause this situation.

I won't say it won't save you once in a great while. Just the other day I had my tractor oscillated to the point the front axle stopped further tilt. I was in a safe place, if there is such a thing when on 3 wheels, and I should have stopped and taken a picture. The faint of heart Safety Police would have had a field day posted here on TBN.

For stability widen the rears as far as your attachments will allow. I run my fronts with the outside of each tire just outside the ends of my FEL bucket. I then run my rears centered on the fronts.

Like your new skins!!!!

 

[ovrszd]

M9540.

 

[oosik]

Yes - the way ovrszd has them set on his M9540. I like those new Carlisle tire also. Finally - one of the pics shows a little dust on a couple of the tread bars. Otherwise - I'd have said the tires haven't even seen one entire revolution yet.

 

[CobyRupert]

Many say that front tire width doesn't make tractor more stable, unless front axle has pivoted to the point it's hitting the stops; and if that has happened you've probably got other troubles (like rear tire has lifted) and it's probably too late.

There's also pros and cons of front and rear tires following same track.

p.s. I never understood how dish in/out puts more strain on the axle. The length of the axle to its connection point on rim is still the same. The weight the axle experiences is still the same, it's seems that just the "lever" (i.e. the offset of the rim's 'dish') is being applied to the axle in the opposite direction. That is, when dish is out, the top of the hub is in compression, the bottom is being pulled away from the axle. When dish is in, the "lever" action torque of this offset is still the same, it's just that the top of the hub is being pulled away and the bottom is in compression. Why is this thinking wrong?

 

[ovrszd]

From the bearings perspective, it doesn't care which way the center rim is pointing. It only cares how far the load is being carried outside it's axis.

In regards to my setup, to increase the distance from bearing axis to center of tire load I would have to flip my centers. My manual doesn't specifically say to not flip them. But the diagrams all show them dished in.

I actually didn't pay any attention to in or out. I just kept adjusting until I had the width I wanted.

In the OP's case it appears his manual specifically states to not flip the centers. So I'd hesitate to do it.

 

[wbuffetjr1]

Thanks for the advice! I will flip the dish back inwards.

Now I need to recruit some help to get the loaded rears moved out to the widest setting. Seems like that is going to be a bear. Any pointers?



I REALLY like that 9540! I could definitely see myself trading up one day.

 

[ovrszd]

Thanks for the advice! I will flip the dish back inwards.

Now I need to recruit some help to get the loaded rears moved out to the widest setting. Seems like that is going to be a bear. Any pointers?



I REALLY like that 9540! I could definitely see myself trading up one day.

Thank you. I put 1300hrs on it with no mechanical problems whatsoever. I ruined a front tire this Winter and now have two new BKT R1W tires.

I grew up watching my Dad swap fluid filled rear tires twice a year to do specific field work. He always got very serious and sternly warned everyone to stay back!!!! I'm the same way. When I moved mine my wife was in the shop. Being the great wife she is she asked me how she could help. I told her the same thing my Dad always told me, STAY BACK!!!! If I lose control of the tire and have to let it fall the last thing I need to do is trip over her in my escape!!!!

Slow and diligent progress. Keep the tire standing as straight up as you can and still keep it leaning toward you. Once it starts leaning farther it gets unbearably heavy quickly.

I am spoiled with a roomy shop and silky smooth concrete.

Tractor in neutral and brakes released so you can turn the wheel to align the bolts when you get there. Good luck!!!!