Dk55 hydraulics problem

[scout.423]

I have a new (130 hrs) dk55 with a hydraulics problem. When I mow with a bush hog (5') or a haybine or pull the square bailer the hydraulics overheat. When this happens the spring back function on the joystick fails in the raise and lower positions. The dump and rollback positions still spring back to neutral. Also the rear remotes become almost impossible to return to neutral after pushed past detent. The dealer started out by changing the hydraulic filter, no help, then he replaced a bunch of o-rings in the system to no avail. Next he replaced the valve that the joystick operates. At first I thought that this had done the trick, but I don't know if it actually helped or I just hadn't pushed the tractor hard enough because while mowing hay this week I had problems once again. I checked the operation of the joystick and it would not spring back from the raise position. The other three positions and the rear remotes seemed to operate normally. We have placed heat indicator strips on the tractor and earlier they were burning in all six heat indicator bars (260 degrees I think). This week only four bars were burned but once again I do not know if the problem is partially fixed or if I just didn't push the tractor long enough to reach six bars. My dealer is about to tear down the hydraulics again. Has anybody had any experience with this problem or any suggestions on what to look for. Thanks

 

[BTI]

Do any/all of those have a hydraulic cylinder on them.
Hydraulic top link? Or side link?
Something is dead heading somewhere.
At idle can you hear a whine or does the three pt act unusual, engine idle slow, sound like it's laboring?
The heat will make things act unusual for sure.

BTI

 

[wallace]

What is the engine temp guage reading?

 

[scout.423]

It behaves like this with or without the fel on the tractor. The rear remotes act the same way if the haybine is plugged in or nothing is connected. There are no other added hydraulic cylinders. The pto acts normal and the engine does appear loaded except when you operate one of the remotes or the joystick.

 

[scout.423]

The temperature gauge never rises past the point that it normally goes to which is just below the first line on of the normal operating marks.

 

[DrRick]

If you are mowing , baling, etc, may I ask why you are using the loader. I think I understand that the loader lever is not self centering when released. Is this correct? I also am curious as to what the remote levers are doing in there detent positions? Is this for the haybine ? I have a dk55c and about the same number of hours, I have pulled a heavy offset disk, and also a 7 foot shredder, as well as a 15 ft batwing in light grass, and have not had any issues as yet, but I would be interested to hear how your situation turns out.
rick roberts

 

[scout.423]

I first noticed the problem while bush hogging with the fel on. The reason it was on was to push a couple of rocks and downed branches out of the way. The rear remotes were used to lift and lower the haybine. Since I first had this problem, on the advice of my dealer, I have operated the joystick and the rear remotes, whether or not the fel was on or if anything was connected to the remotes, periodically as I used the tractor to see when and if the problem occurs. It seems to take 3.5 to 4 hours in 90 degree heat to start acting up. The hay tedder does not seem to put enough strain on the tractor to cause this.

 

[scout.423]

Oh well looks like I'll have to wait till spring for any answers because the dealer didn't find anything this round and I don't have anything to do that would replicate the problem till next year. Does anyone have any idea at what temperature the hydraulics would have to reach before I need to worry about damage to my tractor?

 

[rback33]

I know on some other tractors it is possible for the three point to be causing the tractor hydraulics to run over relief. Is this possible on the DK55 as well?

 

[BTI]

Thats what I keep running thru my head, hydraulics bypassing creates ALOT of heat.
Surely there is something the dealer can do to recreate the situation.
Gonna be 90's here this weekend.

BTI

 

[jeffva]

Okay, this is good to know. I have a DK55C with about 180 hrs on it and it is doing the same thing. Here is my two cents. I've had power steering problems with this guy from about day one. I've mentioned it to my dealer but they didn't say much. I think the power steering is not right, thus putting strain on the rest. I'm going to call Todd over at Tractor Hill and see what he can tell me.

 

[DrRick]

did I read correctly on the Kioti website that the PTO is connected with a Hydraulic clutch pack? If so could the load on the pto over time cause a heat problem if the clutches were loaded enough to slip a bit ? I don't know what the setup is, but I seem to remember someone else on this forum having to replace the pto clutch on there tractor at what seemed a premature number of hours. If a person used the tractor to operate a heavy pto load at a lower engine rpm would this affect the hydraulic pressure keeping the pto clutch pack locked?? Again- I am uneducated as to the mechanics and just talking out loud.
rick

 

[scout.423]

I'm not sure about the PTO clutch but I will ask about this. Now they are going to install a hydraulic cooler on the tractor. They say that a dk55 with cab comes standard with the cooler but it is not on the ROP's model. My concern with this is why is my dk55 ROP the only one that needs a cooler and are we just eliminating a symptom and not fixing the problem. Even if we cool the hydraulics down to where the joystick operates properly are we leaving a problem that will come back to haunt me later, like after the warranty period. By the way if there are any power steering problems I have not noticed them.

 

[NY_kioti_sales]

not to overlook the simple things, but are your remotes in the neutral position when nothing is hooked to them? If remote is engaged and nothing is hooked to them it flows through the relief and gets VERY hot.

 

[jeffva]

I've got the cab model, so I'm not sure the cooler will help, as mine is doing the same as yours. I would say it won't hurt... put it in. Last night I got under the cab to make sure there weren't any sticks in the hydro valve body, etc. It was clean. I'm going to check my three rear remotes tonight... why I didn't last night, I just don't know.

I spoke with me dealer and he has some info for me. I'll give him a buzz this afternoon. I've got to tell you this tractor is a real solid piece of machinery. I'm not worried about this problem, as I know we can fix it... so I'm going to move forward and work with Kioti to figure it out.

I'll let you know what I find... hopefully it isn't something too stupid on my end!

 

[jeffva]

Okay, I don't have a hydraulics cooler... thought I did, but my tractor was right before they added them for the new DK55Cs, so I'm going to check my temps as well, maybe this weekend.

 

[scout.423]

Yes the remotes are in neutral while operating. The only time the remotes were activated was to lift or lower the haybine which takes only a couple of seconds.

 

[DrRick]

I had a chance to play with my dk this weekend, and while I was waiting to unload a tank from the truck with the forks I seemed to notice the hydraulics making a strained noise at idle. I checked the remotes and they were fine. What I did discover was that I had raised the position lever on the 3 point all the way up. The full up position was causing a bypass situation, and it only took a slight down movement to stop the sound. I have never observed this before but the sound was not that loud, and I may have missed previous occurances. I don't know if this could be the problem, but I wanted to pass along.
rick

 

[scout.423]

Dr. Rick, that would make sense on the haybine but not on the bush hog. I will see if I can find time to run to the dealers and see if mine acts the same way. Thanks

 

[BTI]

Does your dealer have a PTO Dyno?

BTI