Great Plains 2SF30 Operator Manual - Manual (Page 51)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 47
2014-01-09 Table of Contents Index 155-015M-A
Marker Adjustments
Speed Adjustment
Refer to Figure 34
Adjust folding speed for dual markers with hex
adjustment screws on the sequence-valve body. There is
one adjustment screw for raising (fold) speed
and one
for lowering (extend) speed . You can identify
adjustment screws by markings stamped in valve body.
Turn adjustment screws clockwise to decrease folding
speed and counterclockwise to increase folding speed.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Excessive folding speed
could damage markers and void the warranty.
After adjusting the folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Refer to Figure 35
The hydraulic system for a single marker has a needle
valve to control folding speed. The needle valve is in the
hydraulic hose at rod end of marker cylinder.
Turn adjustment knob clockwise to reduce folding speed
or counterclockwise to increase folding speed. With
tractor idling at a normal operating speed, adjust marker
folding to a safe speed. Excessive folding speed could
damage markers and void the warranty.
Figure 34
Speed Adjustment, Dual Markers
14048
1
2
1
2
Figure 35
Single Marker Speed Adjustment
15625