Kioti DK4210 FEL won't lift and curl or drop and dump at same time

[K5lwq]

What is the advertised flow rate for the DK4210? Did the dealer measure the flow rate of your tractor to determine the pump is in spec?

I replaced my valve recently and I can operate two functions at the same time without much issue. If I have the RPM up and feather the valve I can get movement on all three functions albeit slow. I have a 10GPM pump.

 

[DK35vince]

Can't comment on the newer models, but my 2001 DK 35 (KL1450 loader) has always lift/curl, lift/dump, Etc. at the same time with no issue.
The loader control has always worked very smooth.

 

[Phantese]

My pump flowrate is 16GPM. Its a new model machine. I think it's an economy loader valve they use. Others have indicated Kubota uses a better brand of valve. Which I have used and is a dream to operate.

 

[Phantese]

Did you replace the valve with the same valve or a different one? Can I ask about the price difference?

 

[K5lwq]

If I am reading this correctly, your loader is around 9GPM. It would be interesting if they would check the flow rate to see if that is in fact what you are getting. I would think you could feather the joystick in 2 directions to get movement on both functions.

The valve I bought was a Walvoil 3 spool for third function. It was around $700. My little tractor is open station so mounting the valve was rather easy. Not sure what all would be involved in changing yours out.

 

[Phantese]

You are absolutely right about the loader flow it is 9 gallons per minute I have never had it tested but that's a good idea I appreciate your information on the type of valve you have thank you

 

[Eddie1955]

You are absolutely right about the loader flow it is 9 gallons per minute I have never had it tested but that's a good idea I appreciate your information on the type of valve you have thank you

Another thing to consider at least for the smaller tractors is if your total 9gpm is divided between implements and steering. I have noticed that in the specs of most smaller tractors the total gpm actually adds the 2 together making your flow rate to implements lower than advertised.

 

[ovrszd]

It's definitely your valve. Only fix is replacing the valve. Sorry.

 

[oldnslo]

You are absolutely right about the loader flow it is 9 gallons per minute I have never had it tested but that's a good idea I appreciate your information on the type of valve you have thank you

Phantese,
A rather simple check for flow rate IF you know the lift cylinder sizes is to time the cylinder travel.

With tractor at rated RPM measure actual cylinder stroke Vs time. Then use that information to figure flow.

Formula: Flow equals cylinder velocity times area.
I typically convert flow to cubic inches per second by multiplying flow in GPM by 3.85 (231/60) or in this case divide your answer by 3.85 to get GPM
cylinder velocity in inches per second
area in square inches.

 

[Phantese]

It's definitely your valve. Only fix is replacing the valve. Sorry.

I am sure you are correct. Sadly....