Great Plains
| 118-732M | 4/4/19
42
1510P & 1520P
Adjustments
Folding Speed with Needle Valves
Refer to Figure 46
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.
Refer to Figure 47
Folding Speed with Sequence Valve
If markers are tied together with an optional sequence
valve, adjust folding speed with hex adjustment screws
on the sequence-valve body. There is one adjustment
screw for raising speed (1) and one for lowering speed
(2). Identify adjustment screws by markings stamped in
valve body.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Turn adjustment screws
clockwise to decrease folding speed and
counterclockwise to increase folding 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 46
Needle Valve
17620
Figure 47
Speed Adjustment, Sequence Valve
14048
Hex Adjustment
Screws
Increase
Speed
Decrease
Speed
