Loader 2003 Kioti CK20HST FEL slow to operate, reduced lifting capacity.
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jabelding
Gold Member
Looking at the diagrams is your loader hooked up to the AB (5,6) ports or in line with the 3pt hitch on port 1.
You probably have already checked but did the AB port valve on top of the valve get moved by accident?
Another thing you can check before you remove the relief valve is to see if any fluid is coming out of port 4. take current drain back hose off and install another hose to a bucket then start tractor. If nothing coming out hose then relief valve is fine.
If relief valve is ok then I would remove the flow divider assemble and check o-rings.
You probably have already checked but did the AB port valve on top of the valve get moved by accident?
Another thing you can check before you remove the relief valve is to see if any fluid is coming out of port 4. take current drain back hose off and install another hose to a bucket then start tractor. If nothing coming out hose then relief valve is fine.
If relief valve is ok then I would remove the flow divider assemble and check o-rings.
My backhoe used to be attached through the those ports (5&6). There were long hydraulic lines that went from the ports through the frame of the backhoe (frame mounted backhoe) to the backhoe controls. I got tired of getting on my knees and hooking these up. I opted for the Kioti complete factory valve kit that was installed (by me) over the rear of the tractor (it was basically a plug and play install, handle and everything). When you say "moved by accident" I'n not quite sure I understand what your asking?.. see the attached video clip on my initial post and maybe that will answer your question?... The valve is in "A" or "B" position when the backhoe is attached. When it's removed the lever is placed in the neutral position. I'll try your recommendation on port 4/drain back hose!..much rather take the smaller steps first, thanks!
K5lwq
Elite Member
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- Kioti LK2554, Branson 4815C, Satoh Beaver, Speedex
The relief you highlighted is the main system relief. Although it could be the issue, the one I suspect is the one on your loader directional control valve.
After you check the main one you might want to check the loader relief. This is a simple thing to inspect and should not take much time to know if this is the issue.
After you check the main one you might want to check the loader relief. This is a simple thing to inspect and should not take much time to know if this is the issue.
Tried your idea of removing the"drain back hose" and seeing if fluid comes out as a result of the relief valve sticking open. I started it up and moved the FEL several times, unfortunately, nothing came out. I took the joystick control valve apart and everything looked really good so I put everything back. Since I had the new parts for awhile, I replaced the joystick control stick parts (swapped out the plastic plungers for steel). Put everything back and fired the tractor up and nothing has changed: FEL slow to operate, hardly no power steering. What I've found is that the speed of the FEL will increase if I operate the FEL and the steering (move the steering wheel back and forth) both at the same time "OR" If I move the control valve for the backhoe in either "A" or "B" position the power steering comes back (see video from first post). I don't know what any of that means and I'm at a loss for what to do now...could an "internal" leak in the FEL cylinders cause an issue like this???
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jabelding
Gold Member
Leaking seal in your loader would not cause this issue besides it would be normal on the other set of cylinders that are not effected. My money would be on the flow divider valve or the pump itself. I would probably start with taking out the flow divider and seeing if it looks ok no torn o-rings or anything stuck in it (#1 on right side, middle image of your manual pics). Your loader valve does not have a relief valve, it uses the main relief on the flow divider block.
If flow divider looks ok then would get a gauge and test your main system pressure on one of the loader ports or at the backhoe ports. I have seen cases that the pump will not build any flow when lower back pressure due to internal leakage of seals but stop the flow a lot it will build good pressure.
If flow divider looks ok then would get a gauge and test your main system pressure on one of the loader ports or at the backhoe ports. I have seen cases that the pump will not build any flow when lower back pressure due to internal leakage of seals but stop the flow a lot it will build good pressure.
OK, I'll give that a shot (take off the flow divider or "priority valve"). I'm hoping this is it too. When I'm done (the tractors outside and it's been raining non-stop) I'll let you know and post some pictures. Thanks for all your advice!..This is all trial and error for me, learning as I go.
Here is the latest video after putting the FEL control valve and joystick back (didn't change anything):
Kioti CK2 H.mov - Google Drive
You can see that when I operate the FEL, the power steering comes back (when done at the same time).
FIXED!!!!... I want to thank everyone who responded to my issue and gave me great advice. To recap, my 2003 Kioti CK20H suddenly lost substantial power to the FEL during several hours of heavy work. Never had this issue before and quite frankly I was a little stumped. I changed the fluids & filters, removed and completely took apart the joy-stick valve body and the joystick itself (replaced the old "plastic" tipped actuators with solid steel one's). The cables and valve body springs needed greasing and though none of this fixed my issue, it needed to be done. Next in line was the "Priority flow control valve" (A big thanks to "jabelding") Took it apart (Very though to get to and remove!) and thoroughly cleaned the body by soaking it in cleaner and using round brushes to get into those small ports and passages. While I was taking it apart, the "spool section" (see attached photo) would not come out?.. I used some needle nose pliers to spin it in it's bore with some lubrication and it finally came out. I found what appeared to be a very tiny metal casting flake that was stuck in one of the spool's machined channels and one of the valve body orifices. It prevented the spool from moving up and down in the bore. Once removed, it worked smoothly. This very tiny obstruction (wish I took a picture of it!) caused my whole issue. Once put back together and reinstalled, everything worked great!!!....Again, thanks for the advise everyone. Gotta love this site!
