HST Problem/Advice

[Bird]

Well, low range, 4WD, full throttle . . . if it won't either climb the hill or spin a tire, it sounds as if something isn't right, and probably need to see a dealer.

 

[KiotiJohn]

Some possiblities.
There are several possibilites.
One is that the pressure relief valves are hitting relief too soon. There were some problem PR valves in several CK20 models.
The symptoms were similar to yours. You would start to go over a hump or something, and the tractor would hit relief and stop moving, making that familiar sound it does when it hits relief.

In this case it would act like it does when you try to use high range and full HST pedal going up a hill.

There's no reason the CK20 shouldn't climp the steep incline in low range with moderate pedal.

Second, you could have bad fuel, often with a blackish goopy look to it from organic growth in the too old fuel. Your filter would be clogged with it. If you take the filter out, make sure not to lose the little O ring ring that is on top of some of them. Replace the filter if it looks gummed up.

If you have too much water in the fuel, you'll see the water in the bottom of the site glass, usually will look almost beige to gray-white. Take off the site glass and empty the bowl, no need to remove the filter unless it's clogged.

Take the air filter off and bang the rubber end on something to knock out some of what it's trapped. I also always blow mine from the inside and outside with compressed air to clean it out well. I wouldn't expect anything major with those few hours.

Check to make sure the filter is seating properly and nothing is blocking the intake of air.

One more thing I want you to check. Make sure you have the power beyong switch completely in the proper position. If you have the backhoe on, the lever should be right at 3:00 if you're looking down on it from the platform, looking through the loader mount. If you have the backhoe off, the lever should be at 6:00. Now this is if you're using the hose kit, not the remotes.
If you have remotes, try moving the remotes lever making sure it's in the proper position also.

It sounds to me as though you MAY have something that is not quite set right and it's compromising the hydraulic flow.

John

 

[Egon]

Sounds like a dealer maintenance shop solution.

Egon /forums/images/graemlins/grin.gif

 

[bluechip]

As John said, be sure if you have remotes they are not latched in one way or the other, and if you are useing the hose kit to run the backhoe, make sure the valve is set right. also be sure you dont have signs of water in the hydr oil, it can sludge up and block the filter up. If the tractor still has some warranty on it (was this the practially new ebay one?) the dealer can transfer the remaining warranty to you.

 

[CBB]

Okay Guys,

Great suggestions. I will give it a look tonight. Ran out of sunlight yesterday.

I am basically thrilled with the tractor and can't wait to get back on it.

Thank you much for the input.

 

[VictorW]

Like Albmn10, I have the CK30hst. I have never been at a loss for power. I snow plowed this past winter and do it in medium range. It will push a full load on a 6ft back blade. Much of the plowing is done in reverse with no problems. In low range, it's a tank and will spin all the wheels if it can't move the load. Mine does feel a little slower with the BH on but with the weight, it just makes the back tires dig in better.
I couldn't find the post but I do remember one member advising he didn't have much power with his CK30hst even though the engine was running fine. It ended up being the relief valve that was opening to soon as KiotiJohn mentioned. I can't help you with the BH valve on your CK20 because it's different than mine but if mine isn't set right, the tractor doesn't have much go power.

 

[CBB]

</font><font color="blue" class="small">( Some possiblities.
There are several possibilites.
One is that the pressure relief valves are hitting relief too soon. There were some problem PR valves in several CK20 models.
The symptoms were similar to yours. You would start to go over a hump or something, and the tractor would hit relief and stop moving, making that familiar sound it does when it hits relief.

In this case it would act like it does when you try to use high range and full HST pedal going up a hill.

There's no reason the CK20 shouldn't climp the steep incline in low range with moderate pedal.

One more thing I want you to check. Make sure you have the power beyong switch completely in the proper position. If you have the backhoe on, the lever should be right at 3:00 if you're looking down on it from the platform, looking through the loader mount. If you have the backhoe off, the lever should be at 6:00. Now this is if you're using the hose kit, not the remotes.
If you have remotes, try moving the remotes lever making sure it's in the proper position also.

It sounds to me as though you MAY have something that is not quite set right and it's compromising the hydraulic flow.

John )</font>

Filter clean. Fuel fine.

The hoses from the BH and FEL all go to a set of remotes positioned on the front right side of the cab. The hydraulic level was set at 6:00. I had a tough time breaking it free so I could move it to 3:00. At that point, none of the hydraulics worked. I put the lever back in the 6:00 position. It is so stiff, I got my first Kioti gash on the top of my knuckle.
Noted improvement. I went back to the hill it would not climb yesterday and it did climb it. Since it has the bumper to bumper warranty for two years, I am going to use it for the summer and in the fall, have the shop check the relief valve out when it is serviced.
Thanks to all for the advice.

 

[dfkrug]

So, Victor....

Have you done anything about checking the relief valve for
the CK30's hydro trans? I wonder what pressure it should be
set to. I will check my manual.

I ask because all the tractors I have had, HST and gear, could
never be stalled in low gear, regardless of load. They just
spun tires. Now that said, I was pulling some old water lines
out of the ground the other day with my CK30HST and I put
the HST into relief. No tire spinning. Low gear, with 4WD and
diff locked, but with low-traction R4 tires. I was amazed and
dissappointed. I wonder if the relief is set to spec?

 

[TBDonnelly]

<font color="blue"> Now that said, I was pulling some old water lines
out of the ground the other day with my CK30HST and I put
the HST into relief. No tire spinning. Low gear, with 4WD and
diff locked, but with low-traction R4 tires. I was amazed and
dissappointed. I wonder if the relief is set to spec? </font>

How many RPM's were you turning?

Don

 

[dfkrug]

I was running near full throttle (2500 RPM). I should have
spun the tires. First time I have seen that.