Bucket Won t Raise Tractor High Enough for Mower: Kubota Review  -- Kubota Tractors Discussion Forum and Review Bucket Won t Raise Tractor High Enough for Mower: Kubota Review -- Kubota Tractors Discussion Forum

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 04-26-2003, 12:52 Post: 53805
Skylark



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 Bucket Won't Raise Tractor High Enough for Mower

Last winter when we removed the midPTO mower, we used the bucket to lift the tractor high enough to remove the mower, enabling us to slide it out from under the tractor. Today when we tried to put the mower back on, the tractor won't lift. It lifts up about an inch then fails. The only thing we have changed since last winter was we slowed down the speed at which the back PTO moves up and down. That's it. What would cause the the tractor to suddenly stop being able to raise itself off the ground? And if it is the relief valve kicking in, why all of a sudden is it kicking in now and how do we remedy this?

I should add we did check the hydraulic fluid and it is fine.






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 04-26-2003, 12:56 Post: 53807
WillieH



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 Bucket Won't Raise Tractor High Enough for Mower

What model tractor are we referring to, and is it a hrydostatic?

Willie H.






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 04-26-2003, 14:05 Post: 53809
Skylark



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 Bucket Won't Raise Tractor High Enough for Mower

Yep hydrostatic and it has about 400 hours on it (very good condition) and it's a '96 B7100 HSD






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 04-26-2003, 17:45 Post: 53816
DRankin



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 Bucket Won't Raise Tractor High Enough for Mower

When you figure it out let me know. About one time out of ten my BX does the same thing, just will not lift the front end.






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 04-26-2003, 20:06 Post: 53821
RichT



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 Bucket Won't Raise Tractor High Enough for Mower

Mark, my BX22 FEL will lift the front end every time. If I use the FEL and backhoe in tandem, I can get the entire tractor airborne (carefully).






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 04-27-2003, 06:40 Post: 53834
TomG

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 Bucket Won't Raise Tractor High Enough for Mower

I imagine it's the flow control valve on the 3ph that was slowed down and that shouldn't affect anything else. I'm assuming that it's the loader lift rather than the bucket that was used to raise the tractor and that the problem is still there. I imagine the oil level was checked. I don't know the tractor but I'm assuming that if it has power steering it's fed from a separate pump rather than a priority valve.

Here are some questions and quick checks that might help sort out the problem. Does the 3ph lift normally? Is the lift down-pressure the only function affected (in other words, does the loader lift and the bucket have normal power)? If the loader lifts with power, will a heavy load stay up?

If the bucket works OK, you might try swapping the lift and bucket hoses at the valve assembly to see if the problem moves to the bucket. If the lift leaks down under heavy load, you might disconnect the lift cylinder hoses to see if the leak-down stops. If there's any doubt about the condition of the oil, screens and filters, I'd change them. If the tractor has a diverter valve, I'd check to see that it is fully in the auxiliary system position.

A bad system relief valve would affect all hydraulics so if some hydraulics are working normally that's not the problem. Many valve assemblies have their own reliefs for each circuit. Swapping valves should identify that and other problems with the control valve. The leak-down test with hoses disconnected would identify a cylinder with seriously blown seals.






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 04-27-2003, 12:14 Post: 53861
Skylark



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 Bucket Won't Raise Tractor High Enough for Mower

>I'm assuming that it's the loader lift rather than the bucket that was used to raise the tractor and that the problem is still there

correct

>I imagine the oil level was checked.

Yes

>I don't know the tractor but I'm assuming that if it has power steering it's fed from a separate pump rather than a priority valve.

Doesn't have power steering.

The bucket works properly up and down. Haven't had a chance to check it with a full load to see if it will stay up lately but it did a few weeks ago as far as I could tell.

>If the bucket works OK, you might try swapping the lift and bucket hoses at the valve assembly to see if the problem moves to the bucket

Sounds like a good idea, I will see if my husband can figure out how to do that....he's a newbie with this stuff but he did dissassemble and reassemble the relief valve this morning. We were thinking that maybe that valve is kicking in when we try to lift the tractor with the bucket and maybe just needs an adjustment? (this goes back to a problem we had over the winter with our back blade (see: http://tractorpoint.com/cgi-bin/tractor/fullThread.pl?parentnum=48125&catname=Kubota%20Owning/Buying&catcode=KU#49087)

where the back blade would suddenly not lift unless I moved the front bucket a few inches an then it would lift fine for awhie, and then quit again. This problem is also happening with the mid-mount mower since it's connected to that hitch. I wonder if the problems aren't related and it's merely a relief valve adjustment?

in any event we ended up driving over the mower to get it attached as it needed to get attached.






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 04-27-2003, 18:13 Post: 53869
DRankin



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 Bucket Won't Raise Tractor High Enough for Mower

I figured out what the problem was with my BX..... me.

I expected it to lift the front end anytime I pushed the boom all the way down, but it does not have enough travel with the bucket curled up to do that.

I have to put some 'down' curl into the bucket cylinder so the boom can raise the tractor.

Silly me.






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 04-27-2003, 21:07 Post: 53884
Skylark



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 Bucket Won't Raise Tractor High Enough for Mower

I had the downcurl...we even put a block under it and that didn't work. It starts to raise and then it stops.






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 04-28-2003, 01:12 Post: 53888
jeff r



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 Bucket Won't Raise Tractor High Enough for Mower

You need to increase the relief valve pressure. The adjustment is in your front loader controls.....screw it in and then tighten the jam nut.






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

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