DK40SE Squeal When Moving in Reverse.

[Coyote machine]

Island, and others interested in an actual resolution to the problem this thread attempts to address, FWIW, I plan to contact Kioti Corporate and seek an answer to whether they have considered a service bulletin or some other effective means of addressing the issue of the squeal, and if the temporary fix they initiated over a year ago is now the official fix for now and the future of our affected tractors.

 

[IslandTractor]

Island, and others interested in an actual resolution to the problem this thread attempts to address, FWIW, I plan to contact Kioti Corporate and seek an answer to whether they have considered a service bulletin or some other effective means of addressing the issue of the squeal, and if the temporary fix they initiated over a year ago is now the official fix for now and the future of our affected tractors.

That seems a very reasonable next step. Just remember that whoever the poor customer service rep is you end up talking to is not the one who makes policy. One approach that gets around that issue is to send a brief clear letter and email rather than phone call. That allows the question to be bounced up the food chain for a response. Mind you, they ignored several emails like that with the cracked loader issue but eventually they did publish and communicate a response. Good luck.

 

[Coyote machine]

That seems a very reasonable next step. Just remember that whoever the poor customer service rep is you end up talking to is not the one who makes policy. One approach that gets around that issue is to send a brief clear letter and email rather than phone call. That allows the question to be bounced up the food chain for a response. Mind you, they ignored several emails like that with the cracked loader issue but eventually they did publish and communicate a response. Good luck.

Good ideas. Initially I want to find out who is the current East Coast Regional Rep is and see what if anything I can find out by a polite inquiry by phone, then followed by email, letters,...then "lawyers, guns and money*":laughing:

* From Warren Zebon song entitled: "lawyers, guns, & money"

NOT to be mistaken as a literal thing.

 

[gkh7890]

Hey Packmates,

Guys....we are all passionate about our Kiotis so pls stop tearing each other apart and jabbing, etc. Frustration can easily get the better of us all!!!

I haven't re-read everything but it kinda sounds like a harmonic issue w/ the metal piping? Having no scientific experience since my lab days in High School many moons ago, what about trying a different brand of hydraulic fluid (has that been mentioned already)? Could that have an impact at all? Just curious.....

BTW, I now have 178 hrs and still no problems of this nature. Thanks and take care......

 

[Coyote machine]

NEWS from KIOTI: I spoke with Kioti in SC.
They have been working in conjunction with Daedong to find resolution to the 'squeal in reverse' issues and here is the latest.
They have come up with an updated line for the left side of the tractor hydraulics lines from the filter to the HST. This is NOT to be confused with the initial 'fix' pieces which were installed on some tractors as a diagnostic means of determining exactly where the problem originated from. It is being referred to as and 'attenuator' and it treats and solves the noise problem on the symptom level- not the cause level, BUT, as the Kioti official explained to me- Daedong and the HST manufacturer are going beyond that for new production HST's by changing the relief valve in the HST to a different/newer part - details of which are NOT currently available, at least not to me.
Side note: to those who wanted to blow off this problem as nonexistant, maybe next time you might consider sitting back and observing instead of creating un-necessary 'noise' on the channel where the rest of us are seeking out a real solution to a real problem.

Here is what I suggest for those who are currently having issues with the noise: VERIFY that it exists on your specific tractor. Speak with your selling dealer and ASK them to create a case for your tractor and ask them nicely to please contact Kioti NA headquarters and ask for the HST attenuator update to be installed on your tractor while it is under warranty.

Understand too that I do NOT speak for or on behalf of Kioti in this matter.
I will say, from a personal perspective that I am impressed that a solution to the problem has been researched by Kioti both here in the states and in S. Korea.
One further note- I would say that it would be UNreasonable for anyone with a squealing in reverse DK series tractor to expect, (especially since Kioti is searching for/finding a possible solution to the cause at the HST manufacturer level), that anyone would expect or ask for a replacement transmission. I was told that in addition to the newest research and problem solving efforts there is, according to the person I spoke to,: NO damage occurring to the HST unit as a result of the symptomatic noise emanating from the HST units.

Hope this information eases some of your concerns about the issue and it's resolution.:thumbsup:

Happy New Year to all, in advance.

CM out.

 

[dourobob]

Thanks for the work and the solid info CM. I will be following up with my dealer soon.

Bob

 

[tinman955]

Is the Bobcat line of tractors having the same problem? I had a CT440 back in 2009 with simular HST noises and traded it for a SST because of relief valve issues, back then nobody could do anything just said thats the way they all are, when it breaks down call us...

This change of relief valve when did they say it will take effect? 2012 models? Reason I ask is I am thinking of getting a CT450 HST cab.

Good work on being persistant. Thanks for the good info.

 

[Coyote machine]

Dourobob, Tinman955,

You're both welcome for the updated info.

I cannot comment on Bobcat tractors and any issues with them- I simply do NOT know anything about what is happening with them or their HST's, etc.
If you think you have a problem with one of their tractors then contact the selling dealer and discuss it with them.

Keep in mind, the HST relief valve change, when and if it happens, is a decision that will be made by the transmission manufacturer, in conjunction with Daedong, S. Korea, the tractor manufacturer. I have no knowledge of when it will happen or if it will happen.

 

[caver]

Thanks for sharing the update as this might now affect me. I plan on trading my LB1914 TLB for a used DK40HST in a few days. The used DK still has just under 2 years warranty left. I drove it around the dealers lot yesterday but that was a cold engine and I was too busy getting used to the controls. I'll check it a little closer when I go back to close the deal or walk.

 

[RJJR]

Thanks for sharing the update as this might now affect me. I plan on trading my LB1914 TLB for a used DK40HST in a few days. The used DK still has just under 2 years warranty left. I drove it around the dealers lot yesterday but that was a cold engine and I was too busy getting used to the controls. I'll check it a little closer when I go back to close the deal or walk.

Not sure about the other folks but the squeal doesn't show up on mine until I work it pretty hard for an hour or two. In fact I bought it new and drove it around the lot twice to see if it was going to squeal but it wasn't enough to show. Any way to talk to the previous owner as it might be hard to diagnose on the lot?