DK40hst keeps moving after letting off pedal
- Thread starter pmaintman
- Start date
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My Bobcat had a sticking hydro pedal. Bobcat told him to spray something on the return spring to lubricate it. He literally sprayed a whole can of WD40 on it. Later Bobcat told him that he should have not used WD40. IIRC it was not compatible with the fluid in the spring. The return spring on my Bobcat had a plug you could remove to check the fluid in the return spring. IDK if the DK tractors are the same. IDK what fluid you are supposed to use either.
I am having the same problem with the HST pedal on my CK 35 with 150 hours. The pedal and linkage work freely with the engine not running and with the engine running if the trans in neutral, but returns very slowly from forward to neutral when running. the return from reverse is OK. Warmer weather did not change anything. If anyone knows anything about the small cylinder on the HST linkage, please fill me in. There appears to be a plug in the side of it, but I have not tried to remove it. The tractor is out of warranty -it is a long trip to the dealer, and he does not give much info over the phone. Any tip will be appreciated.
SSdoxie
Elite Member
The CKs are all (100%) mechanical linkage from pedal to the HST swashplate (pump stroke) shaft. DKs the pedal shifts a valve spool to direct pilot oil pressure (charge pressure) to move the swashplate. If the pedal comes back up to neutral but pump stays in stroke, there is an internal problem that dealer needs to look into.
srusse
Member
- Joined
- Jun 1, 2006
- Messages
- 30
- Location
- Central Louisiana
- Tractor
- Kioti Ck30HST FEL, Mechron 2200, Grasshopper 325A ZTR
I have a CK30 HST 2007 (I think) and have had the same problem/quirk. My solution is when I notice this, place the trans in neutral and press forward and backwards a bunch of times. Spray every place it can rub with oil/WD/etc. For me, it clears it up for weeks if not months. I believe it just a friction problem with the linkage.
bubbu55
Silver Member
My 2008 CK35 has been doing that for awhile now, I've lubed it with several products including white grease and it's still acting up. So I don't know what the problem is. My dealer closed up shop a few years ago and the nearest place is a long ways away. So I don't know what to do about it.
Coyote machine
Super Member
- Joined
- May 4, 2009
- Messages
- 7,641
- Location
- Southern VT
- Tractor
- 22 SANY SY 50U, '10 Kioti DK 40se/hst KL-401 FEL, loaded tires, KB-2485 bhoe, Tuffline TB160 BB, Woods QA forks, MIE Hydraulic bhoe thumb & ripper tooth, Igland 4001 winch, & GR-20 Log Grapple. Woods BBX72" Brush Mower. Diamondplate aluminum canopy
You're off warranty, so the fix could be costly, if internal. Refer to post 14 of this thread for further insights.
IXLR8
Veteran Member
I had a CK30 with similar issues, dealer said it was a common problem. He said that the clearance between the pedal shaft and the case is too small to accept grease, gets slightly rusty and binds. His fix is to pull the shaft, ream out the case a few thousands, grease shaft and case. He claims he has done several and it has solved the problem. Maybe your CK35 has the same issue. I have no idea what is involved in pulling the shaft to ream the case.
k0ua
Epic Contributor
It that is what the problem is, I would be soaking that joint in Kroil 24/7 until it freed up.
