Kubota M7040 with grooved R4's

   #1  

Rob41

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Nov 20, 2021
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Cheboygan, MI
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Kubota M7040
First off I have two disclaimers:

1. Only did the fronts so far.....will do the rears in a couple days.
2. My perspective is that of a first time tractor owner with zero experience.....ever on a tractor.

I found a lot of R4 tire grooving info but only on tractors up to about an L series Kubota so I thought I'd post up the grooving on my M7040 that weighs in about 9k lbs with the loaded rears and loader.

I won't have my 7' snow blower on the back till this week but I did get a chance to clear out 3-4 inches of snow from my paved driveway today.....before the grooving. There were a couple times the rear tires spun a little going up the slight slope with a bucket full of snow and I had to use 4 wheel drive going up a small berm on the side of the driveway to dump the snow. Maybe I could have just locked the rear differential. It has been about 30F today so a few more degrees and the snow may have turned wet. I'm just glad I Youtubed how to remove snow with a bucket. That's how I learned about the bucket float function! This was mu first time doing anything with the tractor other than looking like a newb.

So to get to the actual post about tire grooving a M7040. I didn't want to waste what kerosene I have for my bullet heater so I just did the grooving in 30F temps. In those temps it is a bit of work so I was able to take my jacket off. I think most people will get a feel for it rather quickly. On one of my first grooves I Had the handle of the groover just a bit to low and made a shallow groove. I then had to go back and go deeper. One word of caution if you have to do that, be extra careful not to go too deep as it will want to. From that point forward, it was super easy to have just the right dept with just a shallow groover barrel to tire angle. Doing a couple lugs and then pausing to let the iron heat up again made the job take about an hour to do the fronts.

As a poster on a green forum said (Kenny) "I'm just a lemming"......well you can add my name to the lemming list too :) However, I have researched enough to know it should make a pretty noticeable difference. Will it be as good as turf tires? Not likely. Will it be as good as chains? Not even close, but making an improvement on R4's is all I was going for anyway. How much difference is yet to be seen. As soon as We get another snowfall I'll be in a better position to update on how my experience has been. Good, bad or ugly I'll pass along how it's worked out for me.
 

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   #2  

LouNY

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Greenwich, NY
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I wonder if sipping would be just as effective.
Turning the blade over and just slicing slits in the lugs.
I have had tires professional sipped at a large truck tire shop before and
they worked quite well, this was a few decades ago don't know if it's still done or not.
 
  
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#3  
OP
Rob41

Rob41

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Nov 20, 2021
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219
Location
Cheboygan, MI
Tractor
Kubota M7040
I wonder if sipping would be just as effective.
Turning the blade over and just slicing slits in the lugs.
I don't know, I haven't read much about siping particularly on a heavier tractor. The only thing I read was speculation about also needing a fairly soft rubber compound for sipping to work and the R4's have pretty stout rubber.
 
   #4  

ovrszd

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Kubota M9540, Ford 3910FWD, Ford 555A, JD2210
Unless you've spent considerable hours on the tractor without the tires cut I'm not sure you are going to know the difference. I cut the rear R4s on an L4400 I had. I cut a wide swath. Thought it helped a little. But couldn't quantify the results. If running on hard surface with no dirt you might see a significant difference. Add dirt/mud and the difference will diminish quickly. I only cut the rears.

DSC03205.JPG
 
  
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#5  
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Rob41

Rob41

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Joined
Nov 20, 2021
Messages
219
Location
Cheboygan, MI
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Kubota M7040
Unless you've spent considerable hours on the tractor without the tires cut I'm not sure you are going to know the difference. I cut the rear R4s on an L4400 I had. I cut a wide swath. Thought it helped a little. But couldn't quantify the results. If running on hard surface with no dirt you might see a significant difference. Add dirt/mud and the difference will diminish quickly. I only cut the rears.

View attachment 722706
I wouldn't disagree with you on not being able to know the difference. But for all the reading I've done, I have yet to hear anyone say it didn't help for the intended purpose of better winter traction when removing snow. I feel confident based on their experiences that it will help weather I can detect it or not.

I have zero mud/mud puddles on my property or slippery clay. My land is not dry for sure......but not mucky anywhere. And I didn't groove the tires for anything but better traction when I'm using my snow blower in the winter anyway.
 
   #6  

Boss 302

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lignum, va
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Interesting, I just learned something new. I would have to agree on the effectiveness but heck it does look good.
 
   #7  

Jchonline

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Feb 19, 2018
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Red Feather Lakes, CO
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Good show, tell us how it goes this winter. Personally I have front tire chains and have been Good enough so far.
 
  
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#9  
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Rob41

Rob41

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Location
Cheboygan, MI
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Kubota M7040
Good show, tell us how it goes this winter. Personally I have front tire chains and have been Good enough so far.
No doubt chains are far superior but I don't want to damage my asphalt driveway......and this was less than $100 :)
 

ovrszd

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Missouri
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Kubota M9540, Ford 3910FWD, Ford 555A, JD2210
I wouldn't disagree with you on not being able to know the difference. But for all the reading I've done, I have yet to hear anyone say it didn't help for the intended purpose of better winter traction when removing snow. I feel confident based on their experiences that it will help weather I can detect it or not.

I have zero mud/mud puddles on my property or slippery clay. My land is not dry for sure......but not mucky anywhere. And I didn't groove the tires for anything but better traction when I'm using my snow blower in the winter anyway.
If I take the time to cut my tires, the chance of me saying it made no difference is extremely small. So,,, cut your tires. If you require significant improvement on whatever conditions you are operating your tractor, change tire type.
 
 
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