2005 M6800S/ LA1002 loader operation issue

[tom121212]

I purchased a 2005 M6800S and sourced a LA1002 loader off of a salvage M6800. After messaging Kubota directly they informed me that that is indeed the correct loader model for this unit based off of the serial#.

I was able to figure out through downloading the LA1002 manual how to hook up the hydraulic lines so that the flow is correct I think. The issue is the loader only works when I hold down or pull up on the lever in the picture

This lever seems to be for operating a hydraulic ram on an attachment through the quick releases on the back.

When the tractor is off the lever seems to have a detent that will hold it in either the up or down position. But when the it is running it will return back to the middle position automatically.

Since it is on the same side as the loader lever in order to operate the loader I need hold the lever down with my knee and operate the loader with my hand. Needless to say that isn’t practical.

Note: If I am in process of raising the loader I can let go of the lever and it will stay in the upper or lower position sometimes. But as soon as I go to lower the loader it returns to center and I need to push it down again to get pressure to the loader lines.

Can anyone tell me what I have done wrong and how I can get this to work properly? Any help would be much appreciated.

It would be fine if I could “activate” the loader by pushing up or down on the lever and it would stay put but having to move both every time just doesn’t work.

 

[Dave_eng]

Where did you get the loader manual?

Can you post the pages containing the hydraulic instructions you followed so we caan try and understand what you have done and what may not be correct.
How many lines connect to your loader control valve. 6 or 7?

Dave

 

[tom121212]

Where did you get the loader manual?

Can you post the pages containing the hydraulic instructions you followed so we caan try and understand what you have done and what may not be correct.
How many lines connect to your loader control valve. 6 or 7?

Dave

There are 4 quick connect and 3 lines coming from the tractors hydraulic system. I followed the line configuration circled in red here. The lines were already connected on the loader valve side since it was a takeoff another machine and based on the length and angle of the fittings I’m pretty sure they are in the right places to the tractor. I removed the plugs that were there and connected the lines.

 

[tom121212]

Here is a link to the entire manual I used. The PDF was to big to upload here the thread gave me an error.

Box

app.box.com

 

[North Idaho Wolfman]

It could be that the rotary aux valve is in the wrong position.

 

[tom121212]

It is hard to tell for sure but it looks like the “130” part numbers are the plugs I removed. The top port got the pump line hose and the bottom port got the power beyond hose.

When you say the wrong position is it a matter of in and out position or turning it? I see what looks like a hole in that valve could it need to be turned?

 

[North Idaho Wolfman]

The rotary valve it has a slot on the end of it, and it turns 90 degree's.

 

[tom121212]

Thank you. That seems to be the case. The roll pin/ indicator is all the way to the right at 1oclock but mine is frozen and won’t turn. Is that part 090 a snap ring on the back? I may need to punch it out from the back to get it to turn. It won’t budge and I don’t want to screw up the slot. Already broke two long flat screwdrivers.

 

[tom121212]

Thanks for the advise. Although I had to pull the entire seat area out to get at it I was able to free up the valve and everything works properly now. I would have never figured that out on my own. Thanks again!!!!!

 

[North Idaho Wolfman]

Thanks for the advise. Although I had to pull the entire seat area out to get at it I was able to free up the valve and everything works properly now. I would have never figured that out on my own. Thanks again!!!!!

Excellent to hear!

 

[amschind]

Edit: I think I have a slightly better grasp now, so let me see if I understand: the lines from the hydraulics section on the tractor which run the loader are still needed to operate the 3 point hitch arms, so when the control block for the loader is installed, the 3 point hitch is now the power beyond function.

Here's another thread which helped me:
Power Beyond Loader Valve

If so, how are we using a valve adapter as per the links above to remove the need for a separate line to the tractor's transmission/tank? It seems like the setups are sending all excess flow from the loader valve block to the 3 point and assuming that those relief valves will handle any trouble if needed. That's great, but then why does the Kubota loader control block have its own return line to the tank as well as a power beyond out?

If I follow the advice from the above thread, it seems like I am deleting a safety feature. If that's not an issue then no problem, but I want to understand how I'm getting away with removing a relief valves return line.

Thanks all!