DK40SE Squeal When Moving in Reverse.

   / DK40SE Squeal When Moving in Reverse. #181  
I was working the tractor today...and i kinda... sorta.. hear a light squeal sometimes when going in reverse. Actually its probably nothing, but after reading the posts I'm hearing gremlins. This one is so minor it probably doesn't really exist. I get easily persuaided..... but ill keep an ear open.
 
   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#182  
I was working the tractor today...and i kinda... sorta.. hear a light squeal sometimes when going in reverse. Actually its probably nothing, but after reading the posts I'm hearing gremlins. This one is so minor it probably doesn't really exist. I get easily persuaided..... but ill keep an ear open.

If you have to wonder if you are hearing the infamous squeal you luckily don't have the loudest backup warning signal known to man.
 
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   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#183  
Hardline banjo fitting pictures. In taking the pictures I noticed something, the grinding around the port openings on the bolts are super rough and not very consistent grind. Warning High Res images.
 

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   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#184  
More banjo bolt pictures. High res.
 

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   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#185  
Picture of the flexible hydraulic line Kioti install replacing the hardline banjo fitting. Again High Res. Pictures.
 

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   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#186  
I checked the my notes in the my service manual from Kioti visit. The HST charge relief value, this is not the HST high pressure relief value, is one of the possible causes of the sound the engineer mention. Another possible causes mention was the power piston or the inlet check valve. The engineer feel the inlet check valves were less likely to be the cause. But he did mention if dirt gets caught in one of the inlet check valve the HST will fail to drive the tractor.
 

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   / DK40SE Squeal When Moving in Reverse. #187  
Tnewbern, I don't know what lit your fire, but a word to the wise- the administration of TBN frowns on expressions like WT* and could prune or close this thread altogether- certainly not something we want at this crucial point.:)

Believe me, I've got NO problem with anyone being p... off; but this site is focused on 'family friendly' and will take action as they see fit.

Now I'm coming to the conclusion that Kioti certainly knows more and is saying less than we all want from them, so I suggest we keep this thread strictly focused on solving the problem and essentially nothing else.

Kioti may have missed doing the cracked loader fix in a timely fashion, but a loader is NOT a transmission and is easily fixed when the mfg. sets their mind to doing so.

And for anyone thinking they may have the noise, from paranoia, or whatever - let me assure you if you have the noise you'll know it immediately.

It seems the dealer's may have been given a corporate lashing to say nothing to anyone about the squeal to cover their own corporate image issues as well as not wanting to hurt current and future sales. Clearly Kioti acts like a lot of companies when a rush to judgment may scare off POTENTIAL new buyers. Deny, deny, deny!!:mad:
After we buy we become just a customer, and not a potential NEW customer. Seems those who have already spent are yesterday's news and anyone who thinks this kind of behind the scenes corporate mentality is non- existent is not paying close enough attention.
This could turn into a case where the silence is deafening, meaning they may decide a solution is too costly and deny, deny, deny on an individual level until our warranties run out.
I'm a realist and KNOW the bean counters are always involved in decisions like this. What will it cost to find and put into effect a real fix? Why is the KWump fix so hard to come by? Why are some, like me unable to get the selling dealer to do ANYTHING, even though Kioti sent them the diagram to use KWump's flex hose solution?! Why is Tnewbern unable to find evidence of anyone other than aliens having been to his yard?

Add these things together, (which is why corporate Kioti denies any knowledge of the internet even existing; unless it is coming through their pathetic web site to comparative deny-ability headquarters, where they can NOT deal with us on a case by case basis).

I found out today that my dealer's 'mechanics' had revved up my tractor to 2500rpms and tromped on the pedals in high gear to hear the squeal noise; after I had asked them to warm it up and see if they heard the noise. At first the dealer said he did not have time and I'd have to pay to get the tractor diagnosed, because Kioti pays them nothing to do diagnostics. Then they decided I should drive over and do the warm up myself. So I agreed to do the demo myself. When I arrived at the dealer I was told they had heard the noise and i could get little in the way of details as to how they came by hearing it. But I was glad to hear there was confirmation of the noise having been heard. Today when the dealer's mechanic dropped off my Brush Hog, he told me what they did to generate it, and I was NOT happy. When I told him it was NOT necessary to rev it to 2500 and slam the pedal in high gear he just looked at me with a blank stare.
I walked away.
When I go to pay for the brush hog I will let them know exactly what I feel about all the nonsense going on with the dealer, and Kioti corporate credible deny-ability.:mad::cool:

CM out for now!
 
   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#188  
Tnewbern, it's interesting that your banjo bolts flow ports appear better then my, but you still had the issue. I wonder if my other banjo bolts in the pre-charge line are just as bad as the ones in my pictures. This could explain the different results between our tractors when the “temp” fix was applied. I can't help but wonder if the issue is a combination of the HST charge relief valve design and the pre-charge pressure at the HST in-port. If the pre-charge pressure at HST in-port is too low and the HST charge relief valve is activated could this cause the valve to behave abnormally? Maybe causing the valve to vibrate open and closed at a high rate instead of just open? When the hydraulics fluid is hotter it is thinner which allow the valve to vibrate more with great force? I believe I need to get a gauge and check the in-port pressure.
 
   / DK40SE Squeal When Moving in Reverse. #189  
KW-
Having been only a lurker in this thread... I suspect your banjo bolt without the shaft recess about the hole could easily be a source of poor flow causing the squeal. I doubt it is the rough surfaces. I am assuming that both of those bolts are used for attaching the line shown.
 
   / DK40SE Squeal When Moving in Reverse.
  • Thread Starter
#190  
KW-
Having been only a lurker in this thread... I suspect your banjo bolt without the shaft recess about the hole could easily be a source of poor flow causing the squeal. I doubt it is the rough surfaces. I am assuming that both of those bolts are used for attaching the line shown.

Yes, the bolts were attached to the line shown.
 

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