Loader 2003 Kioti CK20HST FEL slow to operate, reduced lifting capacity.

[Truck9]

I have a 2003 Kioti CK20hst with about 500 hours on it. Runs great and have always keep up on the maintenance. The other day I was using the FEL to take sand from my next door neighbors yard over to my yard for a horse arena. After about an hour of work, I noticed that my FEL had trouble lifting a full load of sand? then I noticed an intermittent loss in power steering. I moved it to my driveway to examine it and found that the FEL was slow to operate and now my power steering would not work??...now here is the odd thing?....If I move my recently installed (6 months ago) Kioti brand rear remote valve lever (for my KB2365 backhoe) from the neutral position (where it should be when not attached) to either position "A" or "B" the power steering now works like it should. However, it does nothing to correct for my FEL issue... I'm stumped!!....Here is what I know so far:

-All fluids are clean and within normal limits.
-The tractor moves forwards and backwards with no issues.
-I've raised my FEL at least 5-6 times attempting to rid it of possible air?... nothing.
-I've disconnected and reconnected the FEL couplings?...nothing.
-Nothing overheated
-Motor runs great and does not appear to be under any hydraulic load unless I move a control lever/valve which is normal.
-Regarding the rear remote valve: I installed it and has worked as expected since the installation and with each backhoe use? No issues, however,
correcting my power steering problem by engaging it (with nothing attached) has me baffled?

Here is a video link of my issue:

23 Kioti ck2hst.mov - Google Drive

Any help would be greatly appreciated!

Thanks,

Bryan

 

[tiogajoe]

Any chance your rear remote being left in the one position put undo stress on your hydro pump?? You didn't say if you changed you hydro fluid and filters?? a clogged/dirty filter could give you poor performance. Maybe try a fluid and filter change? Esp. if it's the original fluid.

 

[K5lwq]

I would look closely at the loader relief valve. It might be stuck open.

 

[Kioti Paul]

Is your backhoe attached now (or anything using the remote)? Perhaps try disconnecting the rear quick connects? Maybe something is allowing the hyd. fluid to flow freely through the rear remote?

That's about all I can think of....Good Luck!

 

[VictorW]

With the rear remote control in N position, the fluid just flows through the valve. It's an open center valve and that how it's supposed to work. From your video, when you moved the remote valve lever to B, you can hear the engine strain a bit as the flow is now being dead headed without anything attached to the remote connections. This would keep all the fluid flow from the hydraulic pump to other portions of the tractor. With the engine straining a bit, I would hope the hydraulic pump is fine because it seems like it's pumping fluid. I would try a new hydraulic filter first unless recently changed. There's one dedicated just for the HST and the other is for all other hydraulic operations.

That's all I have. Other members should comment.

 

[Truck9]

The valve is left in the closed position (neutral position between the "A" and "B") when not in use (backhoe not attached). I did not change the fluids as a result of this issue, however, all maintenance (oil/hydraulic fluid/filters etc..) have been on schedule. I'm thinking more along the lines that maybe a relief valve is stuck open some how?.. I'm trying to research the hydraulic circuit to see if I can find a relief valve that I can maintenance. I may just change the fluids and filters just to check that box but because it happen so abruptly, I think it may be something else?... still don't understand why activating my rear remotes (whether the backhoe is attached or not) has anything to do with my power steering coming back?....Thanks for your reply!..oh and by the way, were you able to see/open the video link from my post??..just want to make sure people can see it. Thanks again.

 

[Truck9]

Would that be the "flow control valve" on the right side of the motor??

 

[Truck9]

Great information and observation. This was my understanding of how this valve works too. I think the hydraulic pump is fine too (I hope), I will replace the fluids and filters just to cover my bases. Question?... if the rear remote valve is not activated, to me that would mean that it's out of the hydraulic circuit and fluid travels in its normal path throughout the system? would that not mean that there would be more available pressure in the system to activate something else (steering, FEL etc.)... I'm just trying to wrap my brain around how the system works. Thanks for your reply! please don't hesitate to send me more information.

 

[Truck9]

Guess I should have replied to everyone with their "quotes".....little hard to read now.

 

[VictorW]

Great information and observation. This was my understanding of how this valve works too. I think the hydraulic pump is fine too (I hope), I will replace the fluids and filters just to cover my bases. Question?... if the rear remote valve is not activated, to me that would mean that it's out of the hydraulic circuit and fluid travels in its normal path throughout the system? would that not mean that there would be more available pressure in the system to activate something else (steering, FEL etc.)... I'm just trying to wrap my brain around how the system works. Thanks for your reply! please don't hesitate to send me more information.

When the rear remote control is is the N position, hydraulic fluid is flowing through the "open center" remote valve and still part of the circuit. In position A or B, without the bh attached, the flow is dead headed or stopped. That's why the engine strains a bit because the hydraulic pump is pumping but having a harder time for it's full flow. With your fluid clean and serviced on schedule, I'd probably try just the hydraulic filter instead of everything. Fast and wishful fix but as you said, you might have a relief valve stuck. Your CK20hst is similar to my CK30hst but I'm not fully knowledgeable with yours. I'd be scratching my head too if that happened to mine.