Great Plains 3S-4000F Operator Manual - Manual (Page 68)

64 3S-4000 Table of Contents Index Great Plains Manufacturing, Inc.
195-394M Table of Contents Index 2014-06-10
Marker Adjustments
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Never allow anyone near the drill when folding or
unfolding the markers.
Dual Marker Speed Adjustment
Refer to Figure 75
Adjust folding speed for dual markers with hex
adjustment screws on the sequence-valve body. There is
one adjustment screw for raising speed
and one for
lowering 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.
Single Marker Speed Adjustment
Refer to Figure 76
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 decrease 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 75
Dual Markers Speed Adjustment
14048
Hex Adjustment
Screws
1
2
Figure 76
Single Marker Speed Adjustment
15625
Needle Valve
Decrease
Increase