Hi... I have a kioti/kubota lk3054 4wd tractor. I just replaced the engine with a used one. When I release the clutch pedal I have a noticeable vibration, not real bad but enough to feel it in the seat. It gets worse as rpms increase and does it in neutral and in gear. I assumed something was wrong with the pilot bearing so I split it back into. The bearing is intact, it spins but has one spot with a slight bit of drag, doesn't seem like enough to cause the vibration. The clutch looks fine and I didn't have the vibration before the engine swap. I am going to put a new pilot bearing in but wanted some input on what else I could check for before I put it back together. Thanks in advance
Kioti with Kubota engine clutch vibration
- Thread starter Ekm
- Start date
Re: Clutch vibration
What parts are from the original engine and what are from the new used engine?
Flywheel, clutch pressure plate, front crankshaft pulley, motor mounts.
On some new engines, the crankshaft is balanced with the flywheel and pressure plate/clutch disk(s) in place. Could you have not indexed these parts so they went back in the same orientation?
The fact that it does vibrate in neutral as well as when in gear seems to eliminate the pilot bearing.
Could the clutch disk be installed backwards? A common mistake.
Just throwing out some thoughts for you to consider.
Dave M7040
What parts are from the original engine and what are from the new used engine?
Flywheel, clutch pressure plate, front crankshaft pulley, motor mounts.
On some new engines, the crankshaft is balanced with the flywheel and pressure plate/clutch disk(s) in place. Could you have not indexed these parts so they went back in the same orientation?
The fact that it does vibrate in neutral as well as when in gear seems to eliminate the pilot bearing.
Could the clutch disk be installed backwards? A common mistake.
Just throwing out some thoughts for you to consider.
Dave M7040
North Idaho Wolfman
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Re: Clutch vibration
Ekm,
You don't have a Kioti / Kubota, you have a Kioti.
Only the "02" series are both companies parts together.
"In the early 1980s Kubota from Japan and Daedong from Korea teamed up to build what is known as the Kubota “02***8243; series of tractors, namely the L1802, L2002, L2402, L2602 and L2802. It was a joint venture with Daedong manufacturing the transmission and Kubota providing its experience with the engine mechanics and other components."
Read more here:
http://www.orangetractortalks.com/2008/09/the-other-orange-tractor-kioti/
There is idiosyncrasies that go with every tractor maker out there, not trying to be rude, but you might get better answers where they deal with kioti's, most here only deal with Kubotas.
Ekm,
You don't have a Kioti / Kubota, you have a Kioti.
Only the "02" series are both companies parts together.
"In the early 1980s Kubota from Japan and Daedong from Korea teamed up to build what is known as the Kubota “02***8243; series of tractors, namely the L1802, L2002, L2402, L2602 and L2802. It was a joint venture with Daedong manufacturing the transmission and Kubota providing its experience with the engine mechanics and other components."
Read more here:
http://www.orangetractortalks.com/2008/09/the-other-orange-tractor-kioti/
There is idiosyncrasies that go with every tractor maker out there, not trying to be rude, but you might get better answers where they deal with kioti's, most here only deal with Kubotas.
Re: Kioti clutch vibration
North Idaho wolfman,
Let me clear that up for you.... I have a kioti lk3054 tractor with a d1402 kubota engine. So yes I do have a kioti/kubota. I know the history of the company. I know this is a kubota site, just trying to get a little input from others. Guess this is why the thread was moved.
North Idaho wolfman,
Let me clear that up for you.... I have a kioti lk3054 tractor with a d1402 kubota engine. So yes I do have a kioti/kubota. I know the history of the company. I know this is a kubota site, just trying to get a little input from others. Guess this is why the thread was moved.
North Idaho Wolfman
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North Idaho Wolfman
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The flywheel could be your issue.
On a kubota there is only one way to put the flywheel on.
Did you notice that you could only put your flywheel on the kubota one way?
Were the 2 flywheels comparable in size, weight, configuration?
On a kubota there is only one way to put the flywheel on.
Did you notice that you could only put your flywheel on the kubota one way?
Were the 2 flywheels comparable in size, weight, configuration?
Dare i ask, it would be sketchy bu can it be started when its split? Guess it wouldnt matter as if its a flywheel issue, problem would still exist. Thrust bearing in engine would knock, your issue is a vibration.
Vibration only when clutch pedal is released,isnt flywheel or pressure plate,as its a constant rotating mass. What it may be is clutch disc or a bent input shaft to transmission.
Pilot only spins when clutch pedal is depressed.
Vibration only when clutch pedal is released,isnt flywheel or pressure plate,as its a constant rotating mass. What it may be is clutch disc or a bent input shaft to transmission.
Pilot only spins when clutch pedal is depressed.
I don't have too much experience with tractors, but I do have a good deal with cars and trucks. As the above poster mentioned, when the clutch is released everything is rotating together. In gear or neutral does not matter. From the crank shaft to the trans input shaft, all is rotating together. Clutch depressed and the crank, flywheel, pressure plate are still spinning so I'd say rule those out. Has to be related to either the clutch disc being out of balance for some reason or transmission-related. IIRC, its pretty easy to ruin a transmission input bearing by deflecting the input shaft. Especially if the shaft is long (leverage). My $0.02
Does the trans input shaft fit tightly in the pilot bearing/bushing? Regardless, I would change it. That could cause what you're experiencing.
I ran the tractor today for about 30 minutes, the vibration gets worse after the tractor heats up. It gets to the point where you can hear it but just barely. Once it's hot I can apply a small amount of pressure to the clutch pedal and it mostly goes away. Push it in all the way and it completely goes away. It also gets worse with increased rpms. It almost sounds like a small knock. I checked the crankshaft for back and forth play and it has roughly 1/8 inch of slack.
I put a new pilot bearing in it, I test fit it on the input shaft and it fit snug.
I put a new pilot bearing in it, I test fit it on the input shaft and it fit snug.
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Sounds like you have an issue with the input shaft of the transmission or the transmission itself.
Had you run it with the old engine?
Had you run it with the old engine?
Last edited:
Any feedback through clutch pedal? Pulsation would indicate something running off cente. Smooth would lead me to believe its input shaft related and not engine.
Is it possible you have a defective clutch disc? Like the splines are not centered in the disc.
You have the vibration when the disc is against the flywheel, but now when they are separated. Has to be something behind the flywheel.
You have the vibration when the disc is against the flywheel, but now when they are separated. Has to be something behind the flywheel.
North Idaho Wolfman
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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more