1840/ TX JIM

Phil 25

Member
Got to play with the hyd controls a bit, changed a 3/8 bolt to a proper top link pin, and removed about
10 plus liters of hyd oil from the machine [ 2 inches above full mark] and things have improved /changed.
At times there is a slight hissing noise heard but no shimmy , if the shimmy starts, a slight movement on position control stops it or increases it. Turning the knob under the seat will stop it or cause the arms to come full up[ knob hard in,closed] and no shimmy when the knob is opened up and the arms drop.
Also when it happens, an increase in engine speed stops the shimmy and all is good, mowing at 540rpm or travelling is no problem.
I did notice that the hyd hose going to the auxiliary outlet control, is where the pulsing can be really felt, when this shimmy is happening, this line is coming off the line feeding the brake control.
Anyway the owner is doing his thing, knows all about it, I am getting the hyd system layout for when he leaves for the year.
Hope i didn't confuse you too much, and the info you sent was good to get.
Tks
 

All knob under seat will do is control rate of drop under seat or lock 3 pt up when valve is closed when 3 pt is in raised position. To my knowledge brake valve only has 2 lines attached to it. 1 line for each side of final drive. Valve is supplied oil via a galley in clutch housing
 
Yep, that's what the under seat valve does but part of what i found in this shimmy business, the remote outlet valve may be an aftermarket
add on? or since its a made in Germany unit, its the way its done there?
Not going to worry about it now, and will get the hyd system info the next week or so and be ready when he returns with it in the fall.
Tks again
 

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