Loader Kubota LA463 Loader Help

[StuartT]

I have a 2009 Kubota L2800 with a LA463 loader. The loader had a bucket cylinder leak and I took it to a shop to have it repaired. They called with an astronomical estimate over $600 with tax and I decided not to use the shop and went and picked it up. They had opened the cylinder and pull out all the seals and they charged me $45 for the estimate and refused to reassemble it. Anyone in the Gilbert AZ area should probably avoid Cohone Technologies IMHO.

So I could use some help. The parts diagram for the cylinder shows 8 seals, o-rings and spacers and I have no idea how I will get them in the right order and orientation when Kubota does not label the individual parts in the drawing. Any assistance on this would be really appreciated. Here is the drawing from Messick's website. I have ordered the kit which includes the parts shown as 060. Click on the image to enlarge it.

 

[fruitcakesa]

I have a 2009 Kubota L2800 with a LA463 loader. The loader had a bucket cylinder leak and I took it to a shop to have it repaired. They called with an astronomical estimate over $600 with tax and I decided not to use the shop and went and picked it up. They had opened the cylinder and pull out all the seals and they charged me $45 for the estimate and refused to reassemble it. Anyone in the Gilbert AZ area should probably avoid Cohone Technologies IMHO.

So I could use some help. The parts diagram for the cylinder shows 8 seals, o-rings and spacers and I have no idea how I will get them in the right order and orientation when Kubota does not label the individual parts in the drawing. Any assistance on this would be really appreciated. Here is the drawing from Messick's website. I have ordered the kit which includes the parts shown as 070. Click on the image to enlarge it.

View attachment 645965

They have some big cojones

 

[old and tired]

Would be nice if you document this!!! (Please!!!)

 

[Peter 315]

I have a 2009 Kubota L2800 with a LA463 loader. The loader had a bucket cylinder leak and I took it to a shop to have it repaired. They called with an astronomical estimate over $600 with tax and I decided not to use the shop and went and picked it up. They had opened the cylinder and pull out all the seals and they charged me $45 for the estimate and refused to reassemble it. Anyone in the Gilbert AZ area should probably avoid Cohone Technologies IMHO.

So I could use some help. The parts diagram for the cylinder shows 8 seals, o-rings and spacers and I have no idea how I will get them in the right order and orientation when Kubota does not label the individual parts in the drawing. Any assistance on this would be really appreciated. Here is the drawing from Messick's website. I have ordered the kit which includes the parts shown as 060. Click on the image to enlarge it.

View attachment 645966

I have a l3800 I will dig out the work shop manual tomorrow and see what it shows...

 

[TMGT]

Could always do the seals in the other cylinder also, that way you'll have a reference if you need it. Most likely it's not far behind on needing a rebuild anyways, unless an outside source damaged the current cylinder you're working on.

Most likely the seals will be pretty self explanatory once you have them in hand.

 

[StuartT]

I have a l3800 I will dig out the work shop manual tomorrow and see what it shows...

Peter, I would really appreciate that. Thanks.

TMGT, rebuilding the other cylinder to see the order of the parts is my backup plan. Hopefully, Peter will find the procedure in his shop manual and save me the extra work. That cylinder is working perfectly and I hate to disturb it.

 

[moship]

Might want to investigate online videos of kubota or other cylinders for general reference.

Some seas only seal in one direction, so think about where the pressure is if any of these types are used. Example:
U-cup seals.

Good luck.

 

[Peter 315]

Peter, I would really appreciate that. Thanks.

TMGT, rebuilding the other cylinder to see the order of the parts is my backup plan. Hopefully, Peter will find the procedure in his shop manual and save me the extra work. That cylinder is working perfectly and I hate to disturb it.

NOTHING in the books on the loader Sorry...

 

[Dave M7040]

I looked in the LA1153 loader WSM.

More complicated than I would have thought with special jigs needed to install the seals.

Also this caution: Do not turn (roll) the piston seal as you install it.

See attached pages.

I also look for a loader WSM on Kubotabooks.com

I found LA344 344S

Index of Kubotabooks/Loaders and buckets/

Its seal servicing procedure is the same using special jigs.

Dave M7040

 

[StuartT]

NOTHING in the books on the loader Sorry...

Thanks for checking Peter. I appreciate it.

I didn't find much on YouTube specific to this cylinder. It is not how to do it, rather the specific arrangement and orientation of the seals, spacers, and o-rings I need to get right. That hydraulic shop dumped all the components in a bag and told me if I am not going to have them do the rebuild, they were not going to reassemble it. Specific to that, I am going to file a complaint with VISA today in an attempt to get the charge reversed; failing that I will go to Small Claims court. While they do post a $45 min charge for inspection, there was no reason to strip the guts out. The nick on the shaft was plainly visible and should have been enough to generate a repair quote. Even if they opened it up, there was still no reason to strip out the seals and o-rings, especially since they broke one of the spacers and damaged two of the o-rings in the process mandating the installation of a new seal kit. I still could have gotten by with it as the leak was very slow. At least it would have been my choice.

Okay, I'm off my soapbox. I have gone ahead and ordered a second seal kit for the other side and I will use it as my guide to rebuilding the first one.

Thanks for all the thoughts and suggestions guys.

 

[StuartT]

I looked in the LA1153 loader WSM.

More complicated than I would have thought with special jigs needed to install the seals.

Also this caution: Do not turn (roll) the piston seal as you install it.

See attached pages.

I also look for a loader WSM on Kubotabooks.com

I found LA344 344S

Index of Kubotabooks/Loaders and buckets/

Its seal servicing procedure is the same using special jigs.

Dave M7040

I didn't see your post Dave until after I posted the above. Not feeling very reassured after a quick skim of what you found but I need to study it further. That special tool adds to the frustration for sure.

Thanks for sourcing that information.

 

[StuartT]

I just spoke with a tech rep from Messick's who is going to send me the applicable pages from the service manual for a LA463. Said he did not think there were any special tools needed for my model except for the external collar that screws into the cylinder, and a pipe wrench or channel lock can be substituted for that. I'll post what I learn in case somebody else ever chooses to reseal one of these.

 

[StuartT]

Here is an email from Messick's re the LA463 loader hydraulics.

Stuart,
Good afternoon.
I apologize, it does state to use special tools(slide jig and correcting jig) to install the expander and piston seal.
However, it instructs you or us as a dealer to make the tools.

We do not have these tools.
Our technician informs me that he would heat the expander in water or oil and install it manually into the piston groove.
He would then install the piston seal over the expander.
And then he would put the piston with seals in a refrigerator for a few minutes, which will shrink the piston seal over the expander
and allow the installation into the cylinder barrel.

I hope this helps, if you need more information, please let me know.

Thanks, Tim

Tim R. Marholz
Messick's Technical Support

P.S. He included pages S-14 through S-17 of the LA 463 service manual. View attachment LA463 piston seals.pdf

 

[StuartT]

I decided there is no better time than now to change the transmission fluid. I have the operators manual indicating where the two drain plugs are under the transmission, but there is nothing about how to evacuate the loaders or three-point hydraulic systems. While I do have the two bucket cylinders in my shop while I put new seal kits in them, there still remains fluid in the two boom lift cylinders. Can someone give me some tips on how to get as much fluid out of the system as possible?

Note: I picked up Super UDT2 and filters today and compared the fluid color. The old fluid is much darker.

 

[Peter 315]

You can't get it all out it will be ok , My l3800 has 4 drain plugs is yours 4wd or 2wd ?

 

[moship]

Maybe disconnect (unthread) the FEL lines?

 

[StuartT]

You can't get it all out it will be ok , My l3800 has 4 drain plugs is yours 4wd or 2wd ?

4WD. I looked again and there are 4 drain plugs. I failed to turn the page. Thanks for the 'catch'.

Moship, I guess making a mess comes with the territory. I'll bleed the boom cylinders off.

 

[TMGT]

Is the fluid contaminated with water? If not I wouldn't worry about the little bit left in the lift cylinders.

Lowering the 3pt and loader lift cylinders all the way will get the most fluid out, the amount of the remaining fluid you get isn't worth the hassle.

 

[StuartT]

Is the fluid contaminated with water? If not I wouldn't worry about the little bit left in the lift cylinders.

Lowering the 3pt and loader lift cylinders all the way will get the most fluid out, the amount of the remaining fluid you get isn't worth the hassle.

No, there is no water. You are probably right about it not being worth it, especially when there are only two of the four loader cylinders with the old fluid. Avoiding the inevitable mess will likely drive my decision.

 

[Peter 315]

Did you get a kubota hyd filter ?