Tire question w/ a new "slant"

   / Tire question w/ a new "slant" #1  

Leef

Bronze Member
Joined
Nov 5, 2000
Messages
50
Location
Iowa
Tractor
Kubota B2910
Tire question w/ a new \"slant\"

I mowed our acreage this weekend for the first time with my B2910 using a brush cutter on the 3ph and my mid mount mower attached (but not in use) b/c the grass-weeds were waist high in places and I had some brush to cut. I also left the FEL on. I have a R&B tiltmeter and discovered that I have some pretty significant slopes to deal with (10 - 15 degrees and sometimes 18 ish). I have already fealt "tippy" on the tractor over the winter and spring, but this was the test on our own property where 90% of our use will be.

It was worse than I expected. Sometimes I was grabbing for the handles (and of course had my belt on). I was pretty nervous and may be disappointed with my tractor choice. Last fall I borrowed an equivalent 4wd JD 955 with turf tires also (no FEL) and cut the same slopes using a MMM. That was one of the first times I'd been on a tractor and didn't feel nearly as "tippy" as I did this weekend after 50+ hours on my Kubota.

I asked the dealer's mechanic about it a few mo.s ago at the 50 hour service and he thought my turf tires were the problem or at a least contributing factor. He thought the turfs are taller and raise the center of gravity AND are "rolly" with rolled/round edges and possibly less compliant sidewalls.

I've been studying the Ag / r-4 / turf / michelin discussions about traction and scuffing, but don't see anything about slope safety. One mention said that turf tires give a wider stance than Ag's so they "should be" safer on slopes, but that wasn't my experience. I had a lot of weight close to the ground, but didn't feel as safe as the 955 w/ only the MMM.

I can do this mowing with a few adrenaline rushes, but I don't want to. I want mowing to be more relaxing and I want my wife and children to be able to do it safely.

When I returned the brush cutter to the rental business I saw another kubota that looked exactly like mine but was smaller. So I thought maybe it's center of gravity is lower and can handle the 10 -15 degree slopes easier like the 955. Upon closer inspection I found it is also a B2910 with some kind of lower profile, squared off edges, bar type tire. It really looked smaller/shorter. It has to be the tires and wheels. It was after closing so I couldn't ask any questions or try it out.

I can live with minor marks on the lawn and had no complaints with turf tire traction this winter with above avg. snowfall. But now I have many many questions about tires which I'd appreciate this board's advice based on experience on slopes:

1. Should I bring the bulldozer back for another $2500 to smooth out the slopes (if it can be done) so my children can learn to mow on this tractor safely?

2. Do all of the mowing myself forever and ever (at 6-8 hours per time) with periodic adrenaline rushes?

3. Replace by now beloved B2910 with something smaller & shorter?

4. Replace with an older used JD 955?

5. Are turf tires really the problem?

6. Do other tires (R-4) have lower profiles, stiffer sidewalls, a more square/stable footprint?

7. If I swap tires, can I use the same wheels or should I get different (wider & shorter) wheels too?

8. How much would that cost?

9. What are my 4 turf tires and rims worth in the classifieds (with 75 hours)?

10. Would filling these tires (or any tires) with fluid give enough low weight to fix my problem?

Thank you in advance,

Leef
 
   / Tire question w/ a new "slant" #2  
Re: Tire question w/ a new \"slant\"

Leef,


You should at least fill the tires to add stability. I would also look into the lower profile tires, or maybe "shorter" tires to lower your CG.

I mowed the area around a neighbors house the other day, and his slope was larger than I wanted to deal with. I managed it by mowing along the fall line.

One tip-over could ruin your whole ...... life. /w3tcompact/icons/crazy.gif

The GlueGuy
 
   / Tire question w/ a new "slant" #3  
Re: Tire question w/ a new \"slant\"

Leef,

I agree with Glueguy. Before you go to far with the expensive opions, fill the rear tires. I felt a huge change in the pucker factor after filling the tires on my B21.

MarkV
 
   / Tire question w/ a new "slant" #4  
Re: Tire question w/ a new \"slant\"

I'll chime in on the tire-filling. It works. Actually you don't really fill them - just up level with the top of the steel wheel. That helps keep the CG low.

I have some very tippy areas too - and there have been situations where the pucker factor was high - like in tall grass and the ground is not visible and the tractor is continuing to inch in the wrong direction, tipping more and more. Don't be a hero - turn downhill and come back to that area later when you can see around it better.

Even when the angle is high, it really is not that close to tipping. The key is to go s-l-o-w.

Does a B2910 have adjustable read tread width?
 
   / Tire question w/ a new "slant" #5  
Re: Tire question w/ a new \"slant\"

Consider two options before you change/invest in new tires & wheels.

1) Space the rear wheels as wide as they will go. You may have to turn the wheels around (inside-out) or may be able to move the wheel hubs further out on the axle, and this should give you more stability.

2) Weight the tires. Either fill them or use rear wheel weights.

Combined, these should really enhance tractor stability.

Bob Pence
18-33782-bobsig.gif
 
   / Tire question w/ a new "slant" #6  
Re: Tire question w/ a new "slant"

I have a 955 with turf tires that I use on modest slopes. I have the front and the rear wheels set in the widest position. This gives an overall tractor width of 60 inches. In addition I use cast wheel weights on the rear--180 pounds each side. Finally, I don't drive on slopes with the loader attached. It raises the CG which is not what you want. If I have a rear implement attached, I install front suitcase weights for balance because they don't raise the CG as much as a loader would. I also have a tiltmeter installed. When it hovers just above 15 degrees, I become very cautious and attentive. If you expect to have your spouse and kids (who presumably have less expertise and experience than you) mow slopes approaching 20 degrees, you may want to consider getting an articulated turf tractor. (Ventrac--www.venturepro.com or Steiner--www.steinerturf.com). These tractors are very low profile and can be equipped with dual wheels front and rear. The mower decks are out front so the overall height of the vehicle is very low. Thus they are well-adapted to working on slopes (up to 30 degrees with dual wheels). I wouldn't hesitate to have inexperienced operators mow slopes with my Steiner, but I would not want them to try it on a taller compact tractor such as the 955.
 
   / Tire question w/ a new "slant" #7  
Re: Tire question w/ a new \"slant\"

Leaving the FEL on also adds to the problem...more weight up top. Leaving the mid-mower on is a good idea. Also note, that the weight of the rear mower (or the mid mower when lowered) doesn't help stability. Intersted in how filling the tires improves the situation, if you go that route.
 
   / Tire question w/ a new "slant" #8  
Re: Tire question w/ a new \"slant\"

The FEL probably contributed to making you more tippy. Try removing it while you mow if it is a quick detach type. If not then make sure you keep the bucket as low as possible while you mow. The FEL can influence your tippiness more than you would think it could and will catch you by surprise, especially if you have a load in it.
 
   / Tire question w/ a new "slant" #9  
Re: Tire question w/ a new "slant"

M. Sullivan must have faster fingers than me, his post snuck in while I was writing mine! /w3tcompact/icons/smile.gif
 
   / Tire question w/ a new "slant" #10  
Re: Tire question w/ a new \"slant\"

Leef,
I think you will be fine with the tires loaded. I had a B8200HST with turfs that were not loaded, and it would cut fine on some big slopes. (see photo attached) With my B2710 with loaded turfs I can't believe how much more stable it is on slopes! I don't have to use 4WD have as much as before. Load the tires and remove the loader first and see if you notice a difference. I would lose the MMM as well so as not to damage it on something hiding in the tall grass.

18-30445-von.gif
 

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