Hydrostat surges jerky in low range

[VictorW]

My CK30hst has been smooth since I got it with 2.4 hours. The only time it acts I guess sluggish but not jerky is when I first start it with temps below 30'F. After a few minutes for it to warm up, it moves fine. The 2000rpm advise is so the hst is getting the proper precharge but that is for it to work at 100%. It should still be able to move at 1000rpms and be smooth.

 

[mj007]

Like others my CK20HST is smooth too, no jerking. Take it back to dealer something is wrong.

Mine has been the same (241 hrs.)

 

[Coyote machine]

Mine has been the same (241 hrs.)

Smooth or jerky?

 

[Coyote machine]

I purchased a new KIOTI ck20s in May 2013. I like the tractor over all but the hydro is very jerky especially in low range. It is noticeable mostly on level ground. If I try to ease it like parking in the barn it tends to jerk then surge forward. It is not smooth. When under load it does not do this. Rpm's do not make a difference. Dealer says it will wear in and smooth out. I have 50 hours on it now and am curious if any one else has the same problem.

It's NOT right. Call your dealer and ask him to fix it NOW. When does he say it will 'smooth out? 61.5 hours? 324 hours? Ridiculous!:confused3:

 

[timbatrader]

At work we have had hydrostatic forklifts for the last thirty odd years (Linde’s made in Germany) over the years we have had problems with them being jerky it has always ended up being a blocked oil filter on occasions mechanics have assured me they have changed all the hydraulic filters and it has not cured the problem and gone looking in other areas valves etc. On both occasions they had missed changing a filter hidden out of sight inside the hydraulic tank once that was changed the problem went away

 

[mpham]

When I first start mine up and try to sneak it out of the garage it will jerk quite a bit. Once I drive it a while and it warms up it is smooth as silk.

 

[shelby12]

My ck20hst does it too. Dealer replaced tractor. New one does it too. I will ask him about neutral valve. If you find anything out let me know.