CK20H tranny pop off seems weak

To20Chris · Jul 15, 2004

It sounds like the old rating of "drawbar HP" is appropriate for the situation being discussed here. It doesn't seem like any of the CUT manufacturers have a spec for that. That is where I would expect the biggest difference between HST and gear. Have you talked to the dealer about it, and if it is adjustable?

KiotiJohn · Jul 15, 2004

Getut, I'm trying to find the information you need. You might want to consider buying a service manual from you dealer. In the meantime, I'm pretty sure the relief valve limit can be reset, but I've not had to deal with this and it should be something done by the dealer as it would be a warranty issue. If you set the pressure too high and have problems, you'll have to eat it. John

B2400 · Jul 15, 2004

The relief valve settings for the HST are adjustable just like the hydraulic system for FEL... You definitely don't want to exceed the manufacturers maximum recommended pressure. Super reliable when operated within their design parameters, very expensive to fix when they're not!!
My Kubota workshop manual gives the specs for this and it appears that the only special tools you need would be a high pressure hydraulic gauge and the adapters to attach to hydro unit. I don't have the book nearby but I believe the pressure relief pops out in the 3000psi neighborhood.

getut · Jul 30, 2004

UPDATE:
I have been talking to my dealer about this problem. One of the perks of living in NC and owning a Kioti is a quick response from the people that see more of Kioti's than anyone else.

My dealer came back to me and said that he heard that there were potentially some springs with the faulty temper in the 4 valves in the hydraulic transmission of SOME CK20H tractors. He is going test my tractor and see if it has the problem, and then replace those valves if this is the case. I almost know it is, because he also said that the guys in Wilson said that beyond a shadow of a doubt the CK20 should have enough power to the wheels to break them loose in 4 wheel drive. Mine won't do that with the weight distributed evenly on all 4 wheels.... only if it gets in a situation where its light on a wheel or 2.

I'm bringing it in saturday, I'll let you guys know how it turns out when I get it back in 3-4 days.

KiotiJohn · Jul 30, 2004

( UPDATE: )
Thanks for keeping us informed. I hope you get this worked out soon so you can enjoy your CK as I do mine. John

Aragon · Aug 26, 2004

Getut, what did the dealer do about the relief valve? I'm considering the CK20HST and would like to know if this is a problem or just an improper setting. Thanks.

getut · Aug 30, 2004

Wow.. had forgot about this until I got the email.

I went to pick up my tractor all most a full week later than I had originally planned. My dealer told me when I went to pick it up that he tested it and nothing was wrong.

But now the kicker... he says he tested it at 4 points on the HST and it gauged what it was supposed to. He says he didn't do anything to it. But I can attest that it is a different tractor since I got it back. Luckily I did quite a bit of real world testing before I loaded it up so that I could have something to compare against once I got it back.

Take for instance.. before I dropped it off, I had to be tached up to around 1800 RPM to keep it from nearly bogging out completely when in high range and going across my flat concrete driveway. It will now spin tires in low range on flat ground.

Even though he says he didn't do anything it feels like it was always under a load before and is not now. I can even push the FEL into solid NC red clay with a grass covering now. There was no way it would do that before.

( Getut, what did the dealer do about the relief valve? I'm considering the CK20HST and would like to know if this is a problem or just an improper setting. Thanks. )

KiotiJohn · Aug 30, 2004

Getut, I suspect that the system had a good bit of air in it all along. When you use your loader do you put it in float while the bucket is in the air and just let it ease down on it's own, or do you push it down first and then all the way forward into float? If you repeatedly drop the bucket into float from a height, it will suck air into the system.
If that happens, raise the bucket and cycle it throught several operations, i.e. curl, rollback, up and down and that should evacuate the air.
After I got my backhoe installed I thought I was losing loader power, but turned out it was because I was dropping into float a lot from height. Someone, Depratt I think, posted about not doing this and since then I have all the old power back. Since this was my first loader, I didn't realize it would suck the air in.
I'm happy to hear your tractor is all better.
One thing about high range. If you give full pedal right away without building into speed, it will lug down a LOT. It's always best to ease into the speed and keep the engine RPM level. It's the same as giving a lot of fuel to a high gear on a gear drive tractor, it just bogs right down until it can equalize. John

getut · Aug 31, 2004

The only time I ever use float was if I was using the FEL and pushed it forward too far by mistake. I don't do alot of back dragging so no need. The ground in my area is very firm red clay so float doesn't work for digging either.

If it was air.. it was in there from day one and is no longer there. It pushes, pulls, lifts and curls like it is supposed to now. Maybe just the act of him testing the HST unit and bleeding it afterwards is what did the trick.

Again, now that I have been on the tractor as it was before and now that it is better is this: Before was like the whole thing was 1000 pounds heavier than it is now. Low wouldn't spin tires, High would nearly bog down if the peddle was pushed all the way down (even slowly) if the engine speed was less than nearly 2000 RPM.

I am a happy Kioti owner now. No regrets whatsoever.

Getut

KiotiJohn · Aug 31, 2004

Fantastic results, no matter what the reason!
I know how you must feel now that yours is doing as well as mine. /forums/images/graemlins/grin.gif John