![GREAT PLAINS 3S-4000 Operator'S Manual Download Page 73](http://html.mh-extra.com/html/great-plains/3s-4000/3s-4000_operators-manual_2259427073.webp)
3S-4000, 3S-4000F, 3S-4000HD, 3S-4000HDF
Adjustments
69
2018-06-19
195-442M
If marker fails to reach ground when unfolded, or is
skipping Marker Speed
The procedure for adjusting marker speed is different for
single marker with needle valve and dual markers with
sequence valve.
Single Marker/Needle Valve Speed
A needle valve controls the folding speed. The needle
valve is near the rod end of the marker cylinder.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Turn adjustment knob
clockwise to reduce folding speed or counterclockwise to
increase folding speed. Excessive folding speed could
damage markers and void the warranty.
Dual-Marker/Sequence Valve Speed
There is one adjustment screw for unfolding speed
and one for folding speed
. You can identify adjustment
screws by markings stamped in valve body.
Turn adjustment screws clockwise (
: slower) to
decrease folding/unfolding speed and counterclockwise
(
: faster) to increase folding/unfolding.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Excessive
folding/unfolding speed could damage markers and void
the warranty.
After adjusting the folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Figure 74
Needle valve Adjustment
15625
1
2
F
S
Figure 75
Sequence Valve Adjustment
14048