Front Tires Rubbing on Bonnet

Grizzo

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Dec 12, 2020
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Australia
See attached picture.
New M5091 front tires rubbing on bonnet when turning full lock and terrain is bumpy.

Is this normal or is something out of alignment?
I'm thinking of cutting down the inside edges of the front tires treads.

Thanks.
thumbnail_Image (6).jpg
 

GreensvilleJay

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don't know the tractor but.....
are the tires STOCK from Kubota ?
Any chance they're dished 'in' instead of 'out' ?
What does the dealer you bought it from say ??
 
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Grizzo

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Dec 12, 2020
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don't know the tractor but.....
are the tires STOCK from Kubota ?
Any chance they're dished 'in' instead of 'out' ?
What does the dealer you bought it from say ??

Haven't asked the dealer yet. Standard tires and rims set to their widest. (Edit- I've since learned that the spacers were set to their widest but rim orientation was not.) There looks to be plenty of negative camber and wheels are toeing out.

Flat ground there is no problem. It happens on rough ground when the front axle pivots up on that side and turning full lock.
 
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RCW

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don't know the tractor but.....
are the tires STOCK from Kubota ?
Any chance they're dished 'in' instead of 'out' ?
What does the dealer you bought it from say ??

I'm with Jay - - - something isn't right.

I'm thinking there should be a way to limit the stops on the steering?

That seems like a REAL tight turn for the tire to touch the bonnet.
 
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je1279

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I agree with the others. It appears that it requires steering stops for that wheel setting and doesn't have them. Any mention of steering stops in the manual when changing front wheel spacing?
 
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North Idaho Wolfman

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Haven't asked the dealer yet. Standard tires and rims set to their widest. There looks to be plenty of negative camber and wheels are toeing out.

Flat ground there is no problem. It happens on rough ground when the front axle pivots up on that side and turning full lock.
Sounds like you need to take it back to the dealer for an alinement, or to have the front rims put on the right side if they are swapped, (can't tell by your picture), and if it's NEW make them replace the bonnet.
 
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whitetiger

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The M5-091 has steering stop bolts that limit how far the wheels can be turned. Your dealer did not correctly adjust them when the wheel width was adjusted. The stops need to be backed out to eliminate tire contact with the bonnet and a new bonnet installed.
 
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SDT

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The M5-091 has steering stop bolts that limit how far the wheels can be turned. Your dealer did not correctly adjust them when the wheel width was adjusted. The stops need to be backed out to eliminate tire contact with the bonnet and a new bonnet installed.
Bingo.

Shortcut during PDI.

SDT
 

Grizzo

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Just a follow up on this. Iv'e since learnt that these tractors need the front wheel width set using dish and rim orientation, depending on what size tires are fitted. The rims are offset, and in my case they were the wrong way around for my size tires, so the rims were turned around and swapped sides to keep correct tire rotation.

There is a chart in the manual that shows the allowed rim widths (wheel and dish orientations) according to your tires size.
 
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je1279

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The tire marks should come off pretty easily with either rubbing alcohol or rubbing compound. Hopefully they didn't deform the metal or create any deep scratches.
 

SDT

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Just a follow up on this. Iv'e since learnt that these tractors need the front wheel width set using dish and rim orientation, depending on what size tires are fitted. The rims are offset, and in my case they were the wrong way around for my size tires, so the rims were turned around and swapped sides to keep correct tire rotation.

There is a chart in the manual that shows the allowed rim widths (wheel and dish orientations) according to your tires size.
That should have been corrected during PDI.

SDT
 

je1279

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@Grizzo did the dealer widen the front tires or did you post delivery? If it was the dealer, I agree with the others that they should repair any damages.
 

Grizzo

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The tires and incorrect configuration are how it was delivered to me. Yes, dealer needs to fix the problem.
 
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kubotafreak

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The tires and incorrect configuration are how it was delivered to me. Yes, dealer needs to fix the problem.
Many are shipped in a crate with the front axle off as part of dealer assembly. Your axle pivot may be too loose.