9n 3pt jumping

Spaulding94

New User
Im having a problem with my 9n when I have an implement on the tractor and raise up all the way up with will start jumping uncontrolabley till u lower it And if u leave it at any height for a lil bit it will do the same. Does anybody have any insight on this?
 

Sounds like it is hydraulic leak down, and so it is repeatedly correcting itself to the position the quadrant is set at.

Mine does it a little too so even if I leave the tractor idling, I often lower whatever is attached, because that jumping bugs my mechanical sensibilities. :)

If I leave something raised and shut off the engine even briefly, when I start up it jumps a hair.

Job for next spring.
 
Could your draft pluger spring be loose?
If it is loose, whenever the movement is stopped suddenly it
can feedback through the plunger and cause control valve
oscillation. Shaking then continues since the plunger is
constantly pulled and then let go.
Greg
 
(quoted from post at 00:33:46 10/02/14)
Sounds like it is hydraulic leak down, and so it is repeatedly correcting itself to the position the quadrant is set at.

Mine does it a little too so even if I leave the tractor idling, I often lower whatever is attached, because that jumping bugs my mechanical sensibilities. :)

If I leave something raised and shut off the engine even briefly, when I start up it jumps a hair.

Job for next spring.
do not believe that you will find that, "leak down & correcting itself" will apply to a 9N, since they do not have position control, thus no position feedback.
 
(quoted from post at 05:22:50 10/02/14) Could your draft pluger spring be loose?
If it is loose, whenever the movement is stopped suddenly it
can feedback through the plunger and cause control valve
oscillation. Shaking then continues since the plunger is
constantly pulled and then let go.
Greg
That's what an implement dealer In town said to I'll check it out to see if that's it .if that is then its an easy fix
 

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