BX22 LA210 Loader cylinder stuck

[idrobnjak]

ugh. so i managed to line up the loader arms square and get it onto the tractor without doing anything to cylinders. Now it goes up and down the way it should, or at the very least the way it used to. More than likely the right cylinder is doing most of the work and the left one is trying to keep up, but you can't tell now that everything is moving together up/down. Will it hurt something if the right cylinder is doing most of the work?

Now, just as I thought I could go and get some work done, a new problem cropped up. the bucket will not raise, only dump. It will not raise even a little bit. So as I was messing with it, little by little, now it is in the all-the-way dump position and will not come back up at all. And I know my bucket worked just fine before, whereas i cannot guarantee my loader cylinders worked in sync before (it only seemed like they did). And my loader control valve when running tractor and trying to move loader is leaking a ton of hydraulic fluid from what looks like the relief valve on top and it is running down the back of the control valve and coming down onto chassis. Could my control valve be clogged up somewhere inside? not allowing any fluid to one side of the bucket cylinder and creating excess pressure resulting in relief valve leaking from the top?

Although i thought I read somewhere these units don't have a relief valve on the loader control valve, only the main one over by the main hydraulic pump under the seat of the tractor. And now looking at picture of Husco 9210 from their site, what they say is relief valve looks nothing like the one I have. Everything else looks the same, but where they say relief valve is - it is a lot shorter and kind of looks sealed on mine. Soooo. what the...

Husco 9210:


Mine:

 

[rbarker]

ugh. so i managed to line up the loader arms square and get it onto the tractor without doing anything to cylinders. Now it goes up and down the way it should, or at the very least the way it used to. More than likely the right cylinder is doing most of the work and the left one is trying to keep up, but you can't tell now that everything is moving together up/down. Will it hurt something if the right cylinder is doing most of the work?

Now, just as I thought I could go and get some work done, a new problem cropped up. the bucket will not raise, only dump. It will not raise even a little bit. So as I was messing with it, little by little, now it is in the all-the-way dump position and will not come back up at all. And I know my bucket worked just fine before, whereas i cannot guarantee my loader cylinders worked in sync before (it only seemed like they did). And my loader control valve when running tractor and trying to move loader is leaking a ton of hydraulic fluid from what looks like the relief valve on top and it is running down the back of the control valve and coming down onto chassis. Could my control valve be clogged up somewhere inside? not allowing any fluid to one side of the bucket cylinder and creating excess pressure resulting in relief valve leaking from the top?

Although i thought I read somewhere these units don't have a relief valve on the loader control valve, only the main one over by the main hydraulic pump under the seat of the tractor. And now looking at picture of Husco 9210 from their site, what they say is relief valve looks nothing like the one I have. Everything else looks the same, but where they say relief valve is - it is a lot shorter and kind of looks sealed on mine. Soooo. what the...

Husco 9210:
<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=336829"/>

Mine:
<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=336830"/>

Wow what a mess you've got going on there! I'd be willing to bet its all related, not really a new issue. I don't have any suggestions but hopefully one of the hydro gurus will be able to offer you some advice.

Sent from my iPad using TractorByNet

 

[ozley]

In that picture it looks like the o-ring has blown out under the plug.

 

[idrobnjak]

so just took kid to soccer and got a little bit of time away from all this to clear my head. gonna take a break for the night and tomorrow again take apart the control valve setup and hoses off of it and see what's up. ozley - you might be right, that may be a blown o-ring. This is my C/V:

The "Shut Off Assembly" is part number 50 so that piece that fits under the nut could be the issue. That would explain leakage from up there and could be responsible for some pressure loss in all this, but I don't see how it may be related to my bucket not lifting up. Unless someone else has some suggestions, after I take apart tomorrow, clean (again) and put back together hopefully it will work. If not, I may look into sending this C/V for a rebuild - found a place up in Akron, OH. New one is $800, so hopefully these guys will rebuild it for significantly less than that if I end up doing that. Fingers crossed for a miracle overnight :/

 

[J_J]

I could be wrong, but that hex nut assembly on top by the spool shaft looks like a plug that they use when that valve is used in a closed center hyd system, otherwise, no relief

Most open center valves have a working relief.

I see no shims or adjusting nut.

Now as far a rebuilding that valve, you can get a new loader valve with float and regen from Surplus for about $241 and you will need the PB adapter also.

Surplus Center - 2 SPOOL COMPACT 10 GPM JOYSTICK CONTROL VALVE

Surplus Center - BRAND POWER BEYOND KIT

Surplus Center - 2 SPOOL 14 GPM PRINCE LVR JOYSTICK LOADER VALVE

Looking at this PDF, it looks like you have what is called a SHUT-OFF plug instead of a relief valve. A direct acting relief valve will have some kind of adjustments. Read the PDF and you will see the relief valve you should have.

http://www.huscointl.com/wp-content/pdf/9210.pdf

Is this a factory valve or did someone get one off Ebay and install it?

 

[BXpanded]

The BX22 has no pressure relief valve in the control valve. The PRV is in the side of the trans inside the right rear wheel.
Parallel cylinders almost always move separately when they aren't attached. The one with the least internal friction moves first. If you continue to extend, the other will "catch up" when the first one hits resistance or the end of it's stroke. They are doing equal work when attached to the loader as the friction difference is negligible in operation.
I don't have enough info to guess why the bucket won't curl other than the possibility that the lines are connected incorrectly.
The BX22 valve comes off with the loader in most cases. Some late production units were built, or were adapted with a kit, that lets the valve stay on the tractor when the loader is removed. Which do you have? If the valve stays on the tractor, you have 4 quick connects. It's possible that one is not seated completely. Take them loose and re-install.

 

[idrobnjak]

The BX22 has no pressure relief valve in the control valve. The PRV is in the side of the trans inside the right rear wheel.
Parallel cylinders almost always move separately when they aren't attached. The one with the least internal friction moves first. If you continue to extend, the other will "catch up" when the first one hits resistance or the end of it's stroke. They are doing equal work when attached to the loader as the friction difference is negligible in operation.

Thanks, that re-assures me my tractor won't blow up with the way i put that back together.

I don't have enough info to guess why the bucket won't curl other than the possibility that the lines are connected incorrectly.
The BX22 valve comes off with the loader in most cases. Some late production units were built, or were adapted with a kit, that lets the valve stay on the tractor when the loader is removed. Which do you have? If the valve stays on the tractor, you have 4 quick connects. It's possible that one is not seated completely. Take them loose and re-install.

I have the kind that stays on the loader when loader removed. And it is a 4-way control valve and used to have the 4 quick-disconnect work hoses, but since I thought they were leaking I replaced them. But I replaced them with straight hoses without quick disconnects - ones designed for the 3-way C/V setup. Looking at diagrams discussed in the first 2 posts of this thread, there is no difference in routing these hoses other than quick disconnects between the two. I have checked at least 7 times to make sure everything was connected correctly from the C/V to the 4 working ports on the loader (blue/red to the bucket cylinder, white/yellow to the boom cylinders). I am 100% I connected them correctly.

Work has been kind of crazy lately and I haven't gotten around to it but my new shut-off cap and the o-ring for the Control Valve came in to dealer and I picked it up. As mentioned tonight or tomorrow I plan to again disassemble the control valve housing and take the C/V out to see if I can see any obvious obstruction in the outlets where the blue/red hoses go in which control the bucket cylinder. It does take a while and messy with all the fluid leaking out, but while doing this I plan to replace the shut off cap/o-ring so hopefully that leak stops. And holding my fingers crossed that once i put all back together, it is all working and not leaking any longer! I am hoping to get to that point by this weekend.

Thanks to all for the help. I look forward to this chapter being complete.

 

[idrobnjak]

Ok, just got around to doing some work today. Took hoses off the C/V and put it on a workbench. Replaced the shut off valve that seemed to be leaking, and when taking off the old one didn't really notice anything wrong with it, looks weird in that pic because the black paint that was over it was chipping. That had me thinking - oh ****. Then poked the c/v outlets responsible for bucket with a skinny hex thingy. then cleaned and re-assembled it back onto loader and reconnected all hoses. If this didn't work my next step was to call the dealer to come pick it up and figure it out.

Fired it up, got it warm, increased the RPM's raised the boom and (after saying a prayer) curled the bucket. Couldn't believe it. Works just fine now. And with replaced hoses and shut off valve, no more leaks either. I was so happy, took it for a ride around the neighborhood.

So just wanted to say thank you to everyone that helped me out in this forum. Couldn't have done it without the great people and all the info contained in this forum. But then again if I never started reading these forums I would have never thought I needed a tractor and would never be in this mess to begin with... Thanks again.

Well, no more leaks in the loader section. Still have the tiny drip to contend with over at the main transmission case but that is least of my worries now since that one is such a small drip, i only notice it after it has been sitting in one spot overnight. Even then it looks like about 10 drops of Hydro fluid. Over a week it adds up, but, like i mentioned, maybe a wintertime project to figure that one out.

 

[radioman]

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