3 Point Hitch Lift Control on Kioti LK35

[KiotiLK35]

Have reviewed my post from last year that SSDoxie refers to. I guess my description was confusing so just to clarify now…. I never wanted to increase 3PH lift speed, all I wanted to do was get rid of the jerkiness. I also confirm I have not installed a larger volume hydro pump - or made any other changes yet. If that means the 3PH lifts a little slower I don't mind as long as I can get a smoothe/gentle lift action. I checked out my tractor again and I do not see the adjuster beside the drop speed control that you describe. I did find a video on youTube that showed how to adjust the MLS valve on a CK20 so I understand what the adjuster looks like and how to adjust it - I just don't find one on my LK35. I also note that the CK20 is a completely different beast to my LK. Mine has the raised transmission tunnel and therefore does not have the flat work platform like the CK. LK also does not have any covers over the drop 3PH drop speed control mechanism, therefore no need to remove the seat or covers to examine the drop speed control. It's right there in the open just like my old Kubota L245.
I have retested the effect of activating 3PH lift/drop control at the same time as operating either the FEL or hydro remotes and confirm that you cannot operate the 3PH lift control at the same time as the FEL or the hydro remotes. The 3PH lift just goes on pause until you release either the FEL or the hydro remote function. Maybe this suggests the 3PH is at the end of the hydro circuit and therefore gets lowest priority? Further I can confirm that the smoothest 3PH response I can get is by moving the lift control lever swiftly from 0-10. That way I get a pretty smooth action, but I have gone through the full lift stroke, whereas I want to be able to just feather the 3PH up inch by inch (like when just lifting a pallet clear of the ground. The slower I move the lift lever the jerkier the lift action is and there is a small delay (maybe half a second) between me inching up the lift lever and the 3PH responding. I hope this further detail helps fill in the picture.
I have a PDF document of the hydraulic section from the Kioti workshop manual. It's about 25 pages. Can I post this as an attachment to this post somehow? I don't see an attachments link here, but maybe someone can help me out. I'm sure it can be done. I have also taken photos and video ofmy tractor going through the 3PH lift process. Again, is there some way I get them onto this post as attachments? Maybe if you guys can see my LK35 it will help.
Thanks again for your patience and support.
I have looked at J252's solution for his L-series of installing a pressure compensated flow control valve and the video of his final solution looks good in operation, although I could only find the "after" video, so I don't know what it looked like "before" his fix. Anyway, if I go down this path I understand it will allow be to control the flow to my 3PH from 0 to full flow. My question is, will this remove the jerkiness or just reduce the effect (but still be jerky)? Just want to be as informed as possible before I embark on any changes.

 

[k0ua]

Both pictures and PDF are easy to post. Multiple ways. Go advanced, manage attachments, pretty much self explanatory. So an LK is nothing like a CK or DK and sounds like a Kubota standard L with the transmission hump.

 

[Fallon]

I have retested the effect of activating 3PH lift/drop control at the same time as operating either the FEL or hydro remotes and confirm that you cannot operate the 3PH lift control at the same time as the FEL or the hydro remotes. The 3PH lift just goes on pause until you release either the FEL or the hydro remote function. Maybe this suggests the 3PH is at the end of the hydro circuit and therefore gets lowest priority?

In a power beyond loop (what all modern utility tractors use) the pump is continuously pumping. Hydraulic fluid flows from the pump into the first valve then out to the next valve & so on with the 3pt usually being the last valve in the circuit. When you partially or completely engage a valve, it partially or completely diverts fluid from the power beyond loop off to the cylinder (or motor, or whatever), resistance on that cylinder builds pressure. So when you engage a valve stuff downstream not working until you release the upstream valve is expected behavior.

I have a Kubota L3200 & am all too familiar with a jerky 3pt. I've seen a LOT of complaining & contemplating on the issue, but only a very few people who've tried engineering better solutions. And of the couple of people who've worked on it, several haven't had much success or said the engineering constraints are to hard. Some have had success with swapping in valves off the higher end Kubota Grand L's or what not though. To much work for something I'm not familiar enough with yet myself.

 

[J_J]

KiotiLK35

Tell me again why you can not operate both 3pt and FEL at the same time.

I explained how in a previous post, but here it is again.

If say your tractor can pump 10 GPM at max engine rpm, then 10 GPM is flowing through all valves to the tank when all valve levers are in neutral.

1. If you push the FEL lever to the max, and not in float, you will use all pump flow to move the cyl. 10 GPM.

2. If you push the FEL lever half way, you might be using about 5 of the 10 GPM available, and that leaves the other 5 GPM to flow to the 3pt. So by using both valves, you are using the 10 GPM pump flow.

Try this. Operate the 3pt and then fully shift the FEL valve. The 3pt should quit and the FEL operate fully. The FEL valve has priority.

Try again and see if you can not use both valves at the same time, using half lever on the FEL.

If you can't do it, tell me exactly what you did.

If you had a flow meter in the circuit, you could see the results.

 

[KiotiLK35]

OK J.J, will try again today just as you describe. I did read your previous post and repeat the test, so please don't think I just blew off you post. Seems to me that if I have FEL operating at all (even feathering rather than full tilt) then the 3PH will not lift at all - until I release the FEL joy stick. But maybe I am on drugs. Will repeat test this a.m. and post again. Cheers, Paul.

 

[J_J]

It is only logical that if the pump is pumping full flow, then, if you use a little of the flow with the FEL, then the rest is flowing on to the 3pt for use or not.

If you fully engage the FEL, you will have no fluid for the 3pt.

 

[KiotiLK35]

J.J. I understand your logic (always did) but I THOUGHT I was seeing different behaviour in my tractor. After running through the process again today I stand corrected, so I guess I was on drugs. Tractor behaved exactly as you described. If I am careful feathering the FEL and 3PH at the same time I can achieve a pretty smooth 3PH response. Of course this is not a practical ongoing solution, espec since you can't be watching your FEL and 3PH at the same time. I notice that if I activate the rear remote hydro lever I can achieve the same effect, which is lot easier since the remote lever and 3PH lever are side-by-side. I guess this would be a plausible temporary solution, but I am keen to make a more deliberate and graceful change - like the pressure compensated flow control valve. Thanks again for your patience and advice. Cheers, Paul

 

[KiotiLK35]

Hi Guys, was in the process of uploading the hydraulic section of my workshop manual when I discovered the 1 Mb limit on PDF files (hydro section is about 14 Mb) so I will cut down to essentials and post later.