Jerky lifting 3 pt hitch- DK40SE

[gunmonkeyintl]

I took my backhoe off for the first time this weekend and hooked up my post hole digger. This is the first time I've had anything hooked to the 3ph. It lowered smoothly, and I was able to adjust the speed that it would lower, but it was extremely jerky when I would lift it. I watched a couple videos on the Kubota L series and mine acted exactly those.

Has anyone seen that issue with their DKxxSE? And what did you do to fix it?

 

[tpulley]

IS your Hydraulic level ok? That and possibly the draft lever in the wrong place make be the culprit.

 

[gunmonkeyintl]

Hydro fluid level is/was fine. I had draft all way forward, but only because my implement didn't need draft control. Also, I had the PHD frame mounted to the top, non-draft-control hole in the top link mount.

 

[ritcheyvs]

Maybe this will help:

http://www.tractorbynet.com/forums/kioti-owning-operating/288804-ck20s-17hrs-honey-moon-over-2.html#post3440257

 

[gunmonkeyintl]

I watched the video and I don't think it is the same as my problem. In the video, and the description of the adjustment, the problem is the 3ph bouncing when in position.

Mine jerks when lifting. If it start with it down, and slowly slide the lever up it jumps and stops. It is almost like it doesn't lift when the lever is between the numbers, but when it hits a number it jumps up an inch or two, then doesn't lift between the next two numbers and jumps up a little more when I hit the next number.

I can then ease it down to any position between the numbers, as is lowers smoothly. It is only jumpy when lifting.

 

[phiferpharm]

It is most likely the lever setting you are using. Mine will get cranky when I lift my Bush Hog SQ172 up sometimes if the draft lever is not to it's liking. I usually just pull that up an inch or two and it stops the shake, rattle, and roll stuff..

 

[tpulley]

Is it binding up somewhere? Is it catching on something?

 

[SSdoxie]

A PHD isn't heavy enough that the MLS sensitivity should even come into play (need adjustment).

Just thinking out loud: Does it make any difference if you open the drop speed up to full drop speed?
You just installed 3pt for first time. How long have you had the tractor? Try spraying the pivot balls on the lift levers, all 4 of them (at tractor mount and attachment mount) to make sure these balls are not dry and binding any.
As last resort, take the PHD off and run 3pt with nothing on it and see how that works, should be smooth through full motion.

 

[Sawworcs]

I have seen DKSE three point systems act real jerky. My dad had the draft lever and the lowering lever mixed up and it would really make a concerning jerk when lifting. Once he put the draft lever all the way down and used the right lever it was great. The far right lever is the lifting and lowering and the left is draft. Good luck.

 

[gunmonkeyintl]

Nothing binding, lowering was smooth and PHD worked great.
I believe I lowered and lifted the hitch after I removed th PHD and it still seemed to lift in increments rather than a continuous, smooth movement.

I checked my service manual and MLS adjustment got me thinking: when it is adjusted too high, the hitch bounces in place. You are supposed to adjust it until the hitch starts to move and then back it off 1/2 turn. If it were backed off too far, would it fail to move when the lever is only lifted a little?
Does the MLS affect lowering as well, or only sending pressure to lift?