POTILA MASTER 500, Operating Instructions Manual

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30
Change valve
The change valve assemblies control the hydraulics
for the frontboard and wing sections. Their purpose
is to distribute the pressure of the same hydraulic
outlet to the frontboard cylinders or wing section lift
cylinders depending on the position of the cultivator
(work or transport position).
It is advisable to lubricate the change valve shafts
with oil before the season and before long-term
storage.
Change valve control rod
•
The total movement range of the change valve is about 90 degrees
(45 degrees in both directions).
•
To adjust the control rod, lift the cultivator on its wheels so that the turning
lever assembly of the control valve is turned backwards.
•
Open the lock nuts of the control rod ball joint.
•
Detach the ball joint from the change valve turning lever and adjust
(extend or retract) the control rod as necessary.
•
Attach the ball joint to the turning lever and lower the cultivator on its tines.
•
Now the turning lever assembly is turned forwards. Test the operation
of the frontboard.
•
If the frontboard operates correctly, secure the lock nuts of the control rod.
Otherwise, perform the adjustment procedure again.