Great Plains 2525P Assembly Instructions - Manual (Page 16)

16 Great Plains Manufacturing, Inc. Front Page Appendix 25-Foot Marker Option
113-786M Front Page Appendix 2013-09-05
Adjust Marker Speed
Independent Marker Speed
Refer to Figure 21
A needle valve controls the folding speed of markers
that are plumbed separately. 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 Speed Adjustment
Refer to Figure 22
Adjust folding speed for dual markers with hex
adjustment screws on the sequence-valve body. There is
one adjustment screw for folding speed
and one for
unfolding speed . You can identify adjustment screws
by markings stamped in valve body.
Turn adjustment screws clockwise to slow (S) fold/unfold
rate and counterclockwise to increase (F) fold/unfold
rate. 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.
Figure 21
Needle Valve
17620
1
1
Figure 22
Dual Markers Speed Adjustment
14048
F
S
S 3
2
1
2