Kubota M9960 Rides Rough Please Help

[kuboman]

Large tractor tires are very difficult to seat evenly on the bead, hence you end up with that out of round feel. With great care and a lot of bead lubrication you can get the tire to seat evenly if you rotate it and carefully inflate.

 

[SDT]

I'll start by saying that I read only the original post, none of the replies.

My new M9960HD12 ROPS was delivered the day before yesterday.

Though I have not yet used it, as always, I checked everything on the PDI checklist because experience has taught me that many (most?) dealers simply check everything off without any such inspection.

The rear 18.4X30 radial tires on my 9960 were inflated to approximately 30 PSI and the front 12.4X24 radial tires were inflated to approximately 35 PSI, both maximum inflation pressure per sidewall indication.

According to the owner's manual, my rear tires should be inflated to 16 PSI and the fronts to 20PSI.

Obviously, inflation pressure will affect ride quality.

IF tire pressure is not your issue, consider the Kubota shockless ride accumulator system for the FEL.

SDT

 

[MtnViewRanch]

I'll start by saying that I read only the original post, none of the replies.

My new M9960HD12 ROPS was delivered the day before yesterday.

Though I have not yet used it, as always, I checked everything on the PDI checklist because experience has taught me that many (most?) dealers simply check everything off without any such inspection.

The rear 18.4X30 radial tires on my 9960 were inflated to approximately 30 PSI and the front 12.4X24 radial tires were inflated to approximately 35 PSI, both maximum inflation pressure per sidewall indication.

According to the owner's manual, my rear tires should be inflated to 16 PSI and the fronts to 20PSI.

Obviously, inflation pressure will affect ride quality.

IF tire pressure is not your issue, consider the Kubota shockless ride accumulator system for the FEL.

SDT

SDT, how is the ride of your 9960?

 

[Amelia Farms]

How are your wheels set up width wise? I have a JD 5520 that I felt was bouncing me out of the seat. The wheels were set to the narrowest setting when delivered. I widened both front and rears by about 6" and the ride improved dramatically. Might be worth a try.

 

[ovrszd]

How are your wheels set up width wise? I have a JD 5520 that I felt was bouncing me out of the seat. The wheels were set to the narrowest setting when delivered. I widened both front and rears by about 6" and the ride improved dramatically. Might be worth a try.

Good point that is often overlooked. Lost track of how many Utility tractors I see with wheels all the way in. Really aggravates the ride.

 

[daugen]

Good point that is often overlooked. Lost track of how many Utility tractors I see with wheels all the way in. Really aggravates the ride.

hmmmm, now that's going to make me look at mine this morning as i hike in the rain to the barn. I never saw much extra axle in there...
and I'm also going to put an air gauge on my tires despite what the dealer just did. I look at my tires occasionally when I have a full load on with the loader to see how
much sidewall flex there is. Not much...of course soft tires suck up hp, right?

 

[ovrszd]

hmmmm, now that's going to make me look at mine this morning as i hike in the rain to the barn. I never saw much extra axle in there...
and I'm also going to put an air gauge on my tires despite what the dealer just did. I look at my tires occasionally when I have a full load on with the loader to see how
much sidewall flex there is. Not much...of course soft tires suck up hp, right?

The L owners can verify this, but, I believe your rear wheels are two piece? Meaning the pieces can be separated and rearranged to change the width of your footprint.

The larger M series are designed with as many as six different width configurations on the rear and front.

Manufacturers almost always ship tractors in the narrowest configuration for obvious reasons. My local Kubota dealer sells them all that way unless the buyer requests a change. Rarely is that requested, and, around here most buyers never make a change.

It was one of the first things I did to my M9540. I work in steep terrain a lot.

 

[farmer2009]

While most Ag tire wheels are adjustable for width. It's a toss up whether R4 wheels will be adjustable.

 

[ovrszd]

While most Ag tire wheels are adjustable for width. It's a toss up whether R4 wheels will be adjustable.

Yep, most times R4 wheels are not. Guess I didn't ask, but just assumed the OP's wheels are adjustable since he's in a larger Utility chassis rather than a CUT chassis.

 

[daugen]

I don't think there is any adjustability here.