bx22 loader hydraulics: Kubota Review  -- Kubota Tractors Discussion Forum and Review bx22 loader hydraulics: Kubota Review -- Kubota Tractors Discussion Forum

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 09-02-2003, 20:53 Post: 63098
ejkessler



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I just bought a bx22 last week and have been breaking it in. I have a little under 8 hours on it and when I checked it today noticed that the trans. stick is just at the bottom line indicating it needs more. First question is how much does that roughly represent and can I buy a quality none Kubota fluid without having to comprimise the tranny? (The dealer is a one hour drive each way and this is my first new tractor and didn't think to ask for fluids when it was being delivered). Second, I have noticed a couple of inches of free play in the fel piston that allows the bucket to pivot a few inches when operating and wondered if this was normal?






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 09-02-2003, 21:51 Post: 63100
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Congratulation on owning a fine machine. If your dealer is close by tell them its lowand I would think they would give you a quart of Super UDT trans fluid to top it off. I assume there are no puddles or leaks. Chances are the hydraulic system did not get completely purged ath the dealer and after running it for a while you managed to chase out any air pockets. Remember Kubota specifies SUPER UDT for the hydraulic oil. As far a free-play in the bucket, my BX-22 has it too. Seemed kinda normal and I got used to it. Glenn






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 09-02-2003, 22:01 Post: 63102
Glenn-D



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oops, if the hydraulic cylinder is acting like s shock absorber you probably still have air trapped in the system. A trip back to the dealer or a call to have them send someone out to purge it and top off the fluid is probably what you need. I have a couple inches play in my bucket but its in the joints, not the cylinder. Glenn






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 09-02-2003, 22:31 Post: 63104
ejkessler



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Thanks for the reply. I thought that maybe it is a little low on fluid as you said and was planning on filling it tommorrow. Hopefully the piston play will go away, if not I'll take your advice and utilize the dealer. Eric






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 09-03-2003, 07:40 Post: 63115
Art White

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Do you have the four way valve or the three way? I would think that the air should be out of the system by now put depending on what type of movement you have it might just be from the system. To top off your oil with a quality hydraulic oil should not hurt. Over the long haul you should try to keep good oil in your equipment. Some people don't and do well but they also may trade every couple years so to them they are fine but beware the next owner who might figure it is there last tractor!






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 09-03-2003, 07:49 Post: 63117
TomG

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Tractor hydraulic oil can be purchased from box stores and all sorts of places nowadays and most of it is fairly universal. I have a long run to my dealer as well and I mix and match oils. You might check with the dealer to ensure that mixing and matching is acceptable and won't compromise the warranty.

Most times air in open centered tractor hydraulic systems is just pushed on through to the reservoir where it bubbles out of the oil before it is pumped again. Some times cycling cylinders is needed. Cycling is just moving a cylinder each way to the limits of its travel and holding the valve open for a few seconds. You should hear a pressure relief valve open, which is a good sound to recognize. You might describe the cylinder free-travel to your dealer. I'm guessing that it's normal.






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 09-03-2003, 09:07 Post: 63129
DRankin

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That sounds a little too floppy to me. I would second Tom's advise about cycling the loader to it's limits.

Two things: 1) If memory serves, your system holds about 4 gallons so topping it off with a quart or two of Wally World tractor fluid will do it no harm. Just read the bottle and make sure what ever you find says tractor hydraulic fluid on the label and it cross references with Kubota UDT. Walmart fluid meets the criteria and there are similar fluids in all major auto parts stores.

2) Make sure your loader got lubed. I have seen several go out that never got any grease on the loader bushings.






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 09-03-2003, 09:56 Post: 63132
Murf

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Cavation is a VERY common problem with the hydraulics on small loaders.

Most owners aren't even aware of the problem. It is caused when a cylinder is forced to move by aforce exerted against it rather than the hydraulics itself. The result is that the hydraulics can't supply fluid to the back-side of the cylinder as fast as the weight is forcing it out of the front-side, the vacuum created on the back-side cause air to pass through the hydraulic cylinder from the reservoir since it can move easier than the fluid can.

The solution is a very simple & inexpensive modification to the hydraulic circuit. Basically a device is fitted in-line with the offending circuit which restricts fluid running in one direction, but does not interfere with fluid going the other way. After the addition of this device, the fluid is restricted from leaving the front-side faster than it can get to the back-side. It no longer then sucks in air.

Best of luck.






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 09-03-2003, 10:41 Post: 63133
Art White

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Murf, normally there is not a problem with these but there might be something else going on if he has the four way valve.






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 09-03-2003, 11:31 Post: 63135
Glenn-D



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Art, are there issues with the 4 way valve? My BX22 came with one of these and there is a hesitation when rolling the bucket forward. The hesitation is a considerable amount of time when the engine is at idle or low rpm. Its really noticeable when trying to put downward pressure by rolling the bucket open. Jotstick to the right. I don't think I will ever have a use for the 4 way and was thinking of changing it to the "standard" valve. Any thoughts? Thanks
Glenn






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

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