Help! Tractor bounces with implement raised.

[redman135]

Double check the draught control knob position. I had a similar problem on a JD, and the problem was to do with the draught control. This was a long time ago so I don't recall details.

 

[Leejohn]

One thing no one has said anything about is the feed back control. Some have a spring on the shaft and the control to the rock shaft can move, but if rusted or real dry can chitter on the rod. That well make the 3pt jump up and down as you go up, just grease or oil it. Like redman said if you have draft control.

 

[square1]

Crank up the RPMs, does it smooth out? Also found the setting the drop rate adjustment to just barely open helps. It's PITA slow when you lower the 3 point, but does mitigate the bouncing.

 

[MossRoad]

Like someone else mentioned.... does this tractor have draft control?

 

[jcoffeen]

Everyone, thanks for you suggestions. I found the culprit. It was this little spring (circled in red) that pushes against the steel ball inside the flow control valve. It looks like someone took it apart in the past and when they put it back together they must have crushed the spring with the valve body (#6 below) because it was all deformed/mangled. Works fine now.