I've got a Kubota M8560 that has just started to squeal at low rpm/idle or when shut off. Any ideas on what this might be? Sound at the linked video Tractor - YouTube
Thanks
Thanks
M8560 squeal noise on shutdown
- Thread starter shm5088
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5030
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Check your input rod that runs from the upper link casting to the modulator valve on the transmission case. You either have an implement on the 3 point that is causing the upper link to 'think' it needs draft or it's out of adjustment (too tight) and it's causing the pump to dead head when you shut it down, Just went through that with one of my M9000's. The rod and linkage needs about 1/8 - 1/16" free play. I didn't know what it was either, my Kubota tech told me what it was. Simple fix. The rod has an adjustable center section and 2 jam nuts. Also, make sure your draft control is set in the 'deepest' position when there is nothing on the 3 point. and use the uppermost hole when attaching any implement that isn't ground engaging.
The actual Kubota spec for the distance between the stop block and the upper link casting is 1/16" if you want to set it to spec but it's a PITA so I just shortened my rod a couple turns.
The actual Kubota spec for the distance between the stop block and the upper link casting is 1/16" if you want to set it to spec but it's a PITA so I just shortened my rod a couple turns.
Our 8560 makes the same noise but now it does it all the time. It's only at low throttle and the noise seems to come from the back of the engine. I checked the input rod linkage that 5030 mentioned in his reply but it has not made a difference.
ovrszd
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Wow, I have no idea. But curious to the outcome of this problem. Hard to tell in the video but if the hydraulics are dead heading all the time it will quickly overheat the hyrdaulics.
Curious how this started. In detail.
Curious how this started. In detail.
yes...just adjust belt tension
5030
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Sure sounds like the pump to me. Fluid level up? any leaks on the suction side? Fan belts don't groan like that. deadheading pumps do.
Yesterday I ran the tractor for about 30 minutes and it didn't make a sound. Today I ran it for close to an hour and when I throttled down it squealed. I noticed that when I put it in forward or reverse it either changed pitch or quit. I'm thinking it's in the hydraulic shuttle. I have a video I'm going to try to post.
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5030
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I have to ask a couple questions and have a couple comments as well..
What year is it and is it under warranty?
Do you have the WSM (workshop manual) for it?
If it's under warranty, I'd let the dealer diagnose it and fix it.
I'm not familiar with yours but both my M's (M9000's) are hydraulic shuttle and the modulating valve for the travelling pack is external to the transmission case and the lock up pressure is adjustable as it the lockup pressure for the PTO clutch pack. I'm assuming it's a true (no dry clutch) hydraulic shuttle with a damper plate in the bellhousing and no dry clutch. On my M9's the clutch pedal is linked to the modulating valve that controls the lockup pressure on the travelling pack and the shuttle lever controls the forward and reverse motion via a shift fork that works in sequence with the pack so when you shuttle, the pack disengages to allow the shift forks to slide the gear sets to achieve forward motion or reverse motion and then reengages the pack (pressure) to allow movement.
The WSM calls out the pressure but you need a fitting and pressure gauge to check it (which I have) and you can get from Motion Industries or Parker Hannifin.
I can look up the pressure for mine but it's probably not the same for yours.
I've never had an issue with either of mine but that isn't to say you don't. I still think the pump is deadheading.
While I don't advocate going to another forum for an answer, I would suggest posting your issue on Orange Tractor Talks. There are at least 2 very knowledgeable Kubota techs on that forum, White Tiger and Lugbolt. They can assist you.
Could be as simple as a linkage adjustment or pressure setting or as complex as a split (because either pack is only accessible by splitting the tractor. My one M has almost 5000 hours on it and the other is just above 2000 hours and I've never had any issues with mine other than upping the lock up pressure on the pto pack (which is why I have the gauge and fitting).
One thing about M's or at least the M9 series. They have weak PTO brakes so I run an external over running coupler on either of mine if the implement I'm using isn't equipped with it's own over running clutch. That was probably addressed as mine are both early 2000 models. I know Kubota has a refit but I never did it as mine are way out of warranty and the upgrade involves a split.
What year is it and is it under warranty?
Do you have the WSM (workshop manual) for it?
If it's under warranty, I'd let the dealer diagnose it and fix it.
I'm not familiar with yours but both my M's (M9000's) are hydraulic shuttle and the modulating valve for the travelling pack is external to the transmission case and the lock up pressure is adjustable as it the lockup pressure for the PTO clutch pack. I'm assuming it's a true (no dry clutch) hydraulic shuttle with a damper plate in the bellhousing and no dry clutch. On my M9's the clutch pedal is linked to the modulating valve that controls the lockup pressure on the travelling pack and the shuttle lever controls the forward and reverse motion via a shift fork that works in sequence with the pack so when you shuttle, the pack disengages to allow the shift forks to slide the gear sets to achieve forward motion or reverse motion and then reengages the pack (pressure) to allow movement.
The WSM calls out the pressure but you need a fitting and pressure gauge to check it (which I have) and you can get from Motion Industries or Parker Hannifin.
I can look up the pressure for mine but it's probably not the same for yours.
I've never had an issue with either of mine but that isn't to say you don't. I still think the pump is deadheading.
While I don't advocate going to another forum for an answer, I would suggest posting your issue on Orange Tractor Talks. There are at least 2 very knowledgeable Kubota techs on that forum, White Tiger and Lugbolt. They can assist you.
Could be as simple as a linkage adjustment or pressure setting or as complex as a split (because either pack is only accessible by splitting the tractor. My one M has almost 5000 hours on it and the other is just above 2000 hours and I've never had any issues with mine other than upping the lock up pressure on the pto pack (which is why I have the gauge and fitting).
One thing about M's or at least the M9 series. They have weak PTO brakes so I run an external over running coupler on either of mine if the implement I'm using isn't equipped with it's own over running clutch. That was probably addressed as mine are both early 2000 models. I know Kubota has a refit but I never did it as mine are way out of warranty and the upgrade involves a split.
