M9540

[Bulldogger]

I really can't say. I have since added additional rear weights for traction control when plowing. Also when loading hay to go out I no don't have to have one on the rear anymore. FYI with the added weight the vibration has completely stopped. The dealer said it was the NEW wearing off the tractor. (Not sure I believe that, but it has stopped.) Here is a pic of the rear weights, I was discing, sorry for the low quality phone pics.

I was wondering if lt had anything to do with the tires needing to wear in a little. It you dont mind me asking what did the rear weights cost and how heavy were they? I noticed in a earlier post you said the front and rear tires were filled are the tires still filled and you added the weights for additional weight?

 

[SPYDERLK]

I really can't say. I have since added additional rear weights for traction control when plowing. Also when loading hay to go out I no don't have to have one on the rear anymore. FYI with the added weight the vibration has completely stopped. The dealer said it was the NEW wearing off the tractor. (Not sure I believe that, but it has stopped.) Here is a pic of the rear weights, I was discing, sorry for the low quality phone pics.

Did it do it in 2wd? If 4wd only the front lead and sharp new treads could be the issue.
larry

 

[MIKE_D]

I was wondering if lt had anything to do with the tires needing to wear in a little. It you dont mind me asking what did the rear weights cost and how heavy were they? I noticed in a earlier post you said the front and rear tires were filled are the tires still filled and you added the weights for additional weight?

Could be sharp edges on tires i guess. All four tires are loaded, also 4 150lb weights, 600lbs total (2 on each side of rear) $500 in black with mounting hardware.

Did it do it in 2wd? If 4wd only the front lead and sharp new treads could be the issue.
larry

It did it in both 2 and 4.

 

[chieff]

I know this post has been out for a while but I just purchased a new 9540 with cast rear wheels, radials and filled 75% with fluid. When I am on hard packed dirt, nearly has hard as pavement I get a horrible vibration at about 4mph. If I speed up it goes away, if I am in loose dirt I get no vibration. This happens whether I am in 2wd or 4wd. Almost like the rear end is just hopping or bucking.

Just wondering if I took some of the fluid out if that would help. I know some sites say not to load radials with fluid but then they go on to say that 40% is the ideal amount. Seems like the valve stem at the 4 o'clock position. I also am not a big fan of the Titan brand tires that came on it but I didn't have a choice.

Were your tires titan brand as well?

 

[JWR]

I just traded up to the M9540. My question is this. When driving around I get this major vibration. It does not last very long and then it goes away. It almost seems like the tractor finds its resonance. This happens at different times. I cannot pinpoint the cause. All of the cab mounts are at proper torque, wheels are at correct torque and tires are at correct pressure. Trans is tight, everything checks out. I'm stumped. Is this common with the 4WD tractors, this is my first. Tractor has 5 hours on the clock.

Any help is appreciated.

Thanks in advance.

I have had similar vibration with both a JD4700 and now a MF2660HD. I spent many years doing vibration analysis for the Navy. I believe your "resonance" term is right on the money. So far as I have been able to find, none of the major tractor mfrs do much in terms of vibration testing before fielding a new model. Both the JD and the MF of mine were 4WD and both made the noise at certain speeds whether it was in 4WD or in 2WD. Mine was far worse and more noticeable on pavement than on soil though at times I could hear/feel it on soil too. I am of the opinion that the tire treads are a factor and that it is probably a resonance between the frequency of the tread bars hitting the ground and tractor frame/fenders/body/attached devices. This is going to differ with every machine but I'm guessing that the fundamental frequency of the vibration is the same as the treads hitting the ground. Then what resonates at that frequency is some piece or part of the tractor (or even the whole frame.) Keep in mind there will be a "beat frequency" which is the difference frequency between the frequency of the rear tread bars hitting the ground and the front tread bars hitting the ground. All of these things should change noise and go through a resonance at some speed but go away at higher or lower speeds.