DK40SE Squeal When Moving in Reverse.

[robiefield]

OK I have video of my DK40SE HST squeal.
They are short videos but they are to the point.

‪2011 Kioti DK40 SE HST Hydraulic Squeal‬‏ - YouTube

‪Kioti DK40SE HST Reverse Hydraulic Squeal 2‬‏ - YouTube

The squeal is loud. Louder when it is hot.

It squeals when in reverse and when going downhills.

I took a video on a hill and it squeals in both directions, but it might be confusing so I have not posted it yet.

I am putting this up so my dealer can see/hear it before a visit.

 

[kattywumpus]

Sounds like the beast! :thumbsup:

I like the new use for an oriental rug!

I'm still waiting for an hydraulic fitting from the Surplus Center so I can get reading at the test port.

 

[robiefield]

Sounds like the beast! :thumbsup:

I like the new use for an oriental rug!

That danged squeal sure is a racket, isn't it?

Kinda taints the wonderful feeling of a new tractor.

Yes, I recycled an old faux oriental rug that was too shabby for home use into a garage floor surface. It's not cold to lie on in the winter, I can see if something is leaking, easy to sweep off, doesn't matter if it gets diesel/hyd fluid/oil spots on it, and when it gets too tatty it's off to the dump.

I figured having another available audio/vid of the squeal might help others who wonder if the have "it".

 

[kattywumpus]

I figured having another available audio/vid of the squeal might help others who wonder if the have "it".

The more videos posted the less it appears the issue is isolated to 1 or 2 tractors and more difficult it is for Kioti to argue it is. Thanks for spending the time to create and post the videos.

 

[whitmerlegacyfarm]

Well guys i think i got one of the squealers. I just watched the video here n mine does that same thing. If i rememberr correctly you all said as now kioti hasnt came up with a fix, correct? Should i just make,my dealer aware of it. Thanks

Sorry, mine is a DK50 hst was a demo with 42hrs when i bought in early spring. Now have 80 hrs.

 

[kattywumpus]

Well it been over a year since I first reported this issue to Kioti and over 3 month since I received any information from their customer support department. So it appears Kioti is leaving it to their customers to troubleshoot.

The following is the Charge Relief Pressure reading from the reverse and forward test ports.

The transmission range selector is in neutral for all tests.

The following reading occur after the reverse and then forward HST petals are pressed and released. Reverse petal press 1st and then the forward petal 2nd and then released.

Reverse Test Port
Engine RPM ......PSI
1000.....155
1500.....180
2000.....190
2500.....195
2800.....200

Forward Test Port
Engine RPM ......PSI
1000.....155
1500.....180
2000.....190
2500.....195
2800.....200

The following reading occur when the forward and then reverse HST petals are pressed and released. Forward petal press 1st and then the reverse petal 2nd and then released.

Reverse Test Port
Engine RPM ......PSI
1000.....160
1500.....180
2000.....380
2500.....390
2800.....360

Note: it appears when the release petal is released the HST does not return to neutral position. Checked twice.

Forward Test Port
Engine RPM ......PSI
1000.....155
1500.....180
2000.....190
2500.....195
2800.....200


After the tractor is hot, used continuously for more then 2 hours, the reading when the reverse and then forward HST petals are pressed and released.


Both forward and reverse ports:

Engine RPM ......PSI
1000.....170
1500.....190
2000.....200
2500.....200
2800.....200

The charge relief pressure for both forward and reverse test port never reaches the recommended pressure of 255 psi when the HST is truly in neutral position and under no load. Kioti and the Dealer said they tested this last year!

It would be a great help if someone with a DK Tractor with HST transmission that does not have the problem could get pressure reading at the HST Pre-charge Port. Between the HST Pre-charge In-Port and the HST filter.

I wondering if the HST Pre-charge Port Pressure should be in the 300 psi range instead of the upper 200 psi range as my previous test shown. To put it a different way, if the HST Pre-charge port pressure was higher would I get higher forward and reverse charge relief pressures? My concern with this theory is the HST Pre-charge Port Pressure reading I took earlier were linear but the test port reading are non-linear. Meaning the test port pressure top out at 200 psi before the engine reaches top RPMs when warmed up. But the HST Pre-charge port pressures continue to increase with engine RPMs.

 

[rocky spring]

I am new to posting, but have been a thread stalker for a long time. I bought a new Kioti DK40se hst (no cab) about three weeks ago (ordered not off the lot) even after seeing this thread, hoping that Kioti would have the squeal problem fixed in production by now. I regret to tell you that they don't and mine squeals as bad as the others have described. My question is how many with this problem have tried the fix tnewbern came up with and have been successful in eliminating the noise. I am going to order the parts to make this swap and hopefully eliminate the squeal.

I know I am complaining, but don稚 get the wrong impression, I like everything about this tractor and everything else seem to work good and be well built. I have had and still have a few tractors and the Kioti is the easiest to drive and operate out of all of them.

 

[grsthegreat]

well i actually got Kioti to tell my salesman that the issue is in the tube that has been discussed here. Its due to harmonic noise from the solid tube, and they insist that it will not cause a problem, and the rubber hose kit will stop the noise. My salesman has ordered the repair parts from Kioti, and he'll drop by and fix it when the parts arrive. We apparently don't have as much of an issue with it in the colder climates as they do in the warmer states. And mine ONLY squeals when its real hot outside. Time will tell if this fixes my problem.... But my Stereo and a/c does block out the noise.

My question to Tnewburn is if the hose eliminates the noise, why not just use the hose and forget about the metal tube??? Am i missing something?

 

[southerniltractor]

Guys, after reading this I'm considering buying a shuttle shift manual gearbox rather than chance a long-term problem as described here. Everyone who owns HST with a loader speaks highly of them, but I'm really afraid of spending what to me is a huge chunk of money on a headache. If you could do it again, would you forgo the HST for a shuttle shift?

Thanks,
Mike

 

[gkh7890]

@ Mike (southerniltractor)

I've got 140+ hours on my DK40 HST, 2010 model, and no problems like this. I really think it is a hit and miss issue. If you really want the HST, talk to the dealer and have them let you use it for a day to make sure the noise doesn't start and just make sure they are prepared to address the problem "if" it should happen?? I really think if you run it for a day around your property, you should be able to figure out if it has it or not???

IMHO, if you plan to do a lot of loader work, you'll want the HST for sure, especially if you'll be doing any precision work (again, IMHO).

Mine has been an excellent performer. I do envy the cab owners though!!! More importantly, I do hope Kioti is taking notice of this and trying to find a solution and take care of its customers!!!!???? If they do find it, they need to get the fix out and get their customers taken care of ASAP......think of the goodwill that could create for the owners and potential buyers......dang, I should work for Kioti, shouldn't I??? I'm thinking I should work as a Quality Specialist/Customer Service Rep.....wonder if they have any positions like that??:laughing::drool:

Sorry! Ventured into lala land......good luck on your purchase and to all who are dealing w/ this issue!!!