Kubota L2900 GST Problem: Kubota Review  -- Kubota Tractors Discussion Forum and Review Kubota L2900 GST Problem: Kubota Review -- Kubota Tractors Discussion Forum

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 03-06-2008, 14:28 Post: 151968
Hand2ThePlow



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 Kubota L2900 GST Problem

I own a 1998 L2900 and am having tranny problems.

1. The tractor will only take off from a stand still in the 4 lower gears and only moves in 3rd or 4th with high RPMs

2. Any resistance like inclines or mud requires down shifting to 1st or 2nd

3. 5th and 6th gears operate once the unit is moving but the tranny disengages when you move into the road gears (7th and 8th)

4. No reverse in 6th, 7th or 8th

The engine, pto and FEL all operate as they should. Does this sound like the main clutch or the hydraulic clutch for the GST? I'm waiting on a service manual but am hoping someone can give me some pre-emptive help.

Please help.






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 03-06-2008, 16:18 Post: 151977
Art White



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 Kubota L2900 GST Problem


For you to have problems you do I don't think that it is the main clutch but the GST system. We've had a couple of isolated problems but nothing like what you have.






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 03-06-2008, 16:37 Post: 151979
Hand2ThePlow



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 Kubota L2900 GST Problem

Thanks for the reply Art. If it is the GST system, are there external adjustments that can be made? Will the tractor need to be split? Any insights, info or past experiences would be appreaciated.






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 03-07-2008, 06:10 Post: 151988
newholland10



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 Kubota L2900 GST Problem

how much free travel do you have on your clutch pedal?you might try adjustin it.






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 03-07-2008, 07:38 Post: 151989
Art White



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 Kubota L2900 GST Problem


I don't think that it is the main clutch, if it has been adjusted right. The cable system on the side do stretch and make the gears so they don't align right but that is consistant in every gear. It does almost sound like the clutch and if you have not tried that adjustment it should be first but depending on how long you have been putting up with this issue the clutch more then likely would be extremely worn from operating it this way.

For the clutch to be bad at the minumum the tractor would need to be split, as well as if the plates on the GST are bad.






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 03-07-2008, 10:33 Post: 151990
Hand2ThePlow



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 Kubota L2900 GST Problem

The clutch pedal has less than an inch of travel. It feels like it engages the lower gears fully and operates without any problems. Just not in the upper gears.

I've only had the tractor a short while and have only worked it in the 3 lowest gears. This past weekend was the first time I took it on the road and discovered the problem.

If it has to be split and the GST clutches replaced, does anyone want to ballpark the cost?






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 03-07-2008, 11:34 Post: 151993
Murf



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 Kubota L2900 GST Problem

Before you go to far down that road, a little more detail on the problem might help with the diagnosis.

I've owned a whole BUNCH of those GST setups over the years, you'd have to really work to take the clutch out under normal operating conditions.

The parts that are still unclear to me are (numbers match yours);

1. What happens when you try to pull away a higher gear? Does the engine lug down and stall out, or rev up like it's in neutral?

2. Again, what happens, does it lose power, rev's, both, or just spin up like it's in neutral?

3. Clarify "disengages". Like it's hitting neutral?

4. What happens when you select reverse? Or will it just not shift into reverse at all?

One of the strange quirks about this machine is that if the cable is out, as Art mentioned can happen, then it can do funny things. The cable can, and does, sometimes accumulate a bit of dirt and moisture, in cold weather this can cause it to jam up some. Since the shifter also activates the automatic shift clutch setup, if the mechanism senses you are trying to shift, it will clutch waiting for you to finish shifting before engaging again. If the shifter is only moved part way, it just hits a sort of neutral and stays there.

This problem happens mostly when the machine is used in just low gears, or parked altogether for a period of time.

Best of luck.






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 03-07-2008, 12:02 Post: 151994
Hand2ThePlow



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 Kubota L2900 GST Problem

MURF WROTE: The parts that are still unclear to me are (numbers match yours);

1. What happens when you try to pull away a higher gear? Does the engine lug down and stall out, or rev up like it's in neutral?
1.1 The tractor behaves as if it is in neutral. I don't think the revs change at all.


2. Any resistance like inclines or mud requires down shifting to 1st or 2nd.-- Again, what happens, does it lose power, rev's, both, or just spin up like it's in neutral?
2.1 The tractor simply looses forward speed and either stops like it is in neutral or if it overcomes the resistance regains the speed

3. Clarify "disengages". Like it's hitting neutral?
3.1 Yes

4. No reverse in 6th, 7th or 8th -- What happens when you select reverse? Or will it just not shift into reverse at all?
4.1 Like it is in neutral. At first I thought that there simply was no reverse in the road gears.

Great questions, I hope this helps. Will the service manual help diagnois something like this?






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 03-07-2008, 12:42 Post: 151997
Murf



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 Kubota L2900 GST Problem

Ok, now we're getting somewhere.

One last question, and it's pretty important, have you made it work, really work, in low gear yet? By work I mean, have tried plowing snow, pushing or pulling something reasonably heavy? Or if it has a FEL have you tried pushing into a pile or dirt or snow yet?

I ask this because it's sounding more like the GST is hitting neutral, waiting for a shift that never happens.

Best of luck.






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 03-07-2008, 13:56 Post: 152002
Hand2ThePlow



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 Kubota L2900 GST Problem

The most I've done was to push some snow around with the FEL. No problems in 1st - 3rd.

My mother in law got her car buried to the axle in mud when she pulled off of her road into her yard and called me to pull her out. That's when I discovered that the road gears didn't work. The tractor pulled her out in 1st gear without any problem.

After I got home I placed the FEL against a tree and was able to spin the tires while in 4wd in 1st and 2nd gear. I didn't try any other gear range.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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