Great Plains 2420 Operator Manual - Manual (Page 24)

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Section 3 Adjustments
2400, 2410 and 2420 Three-Point Drill 118-706M 5/15/06
Great Plains Mfg., Inc.
Marker Adjustments
Folding Speed with Needle Valves
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. See Figure 3-12.
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.
Figure 3-12
Needle Valve
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. See Figure 3-13. There is one
adjustment screw for raising speed (1) and one for lower-
ing 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 counterclock-
wise 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 3-13
Speed Adjustment, Sequence Valve
17620
14048
Transport Carrier
When marker is folded, the second section should be cen-
tered in transport-carrier saddle and parallel with top of
drill box.
To adjust front-to-rear position of saddle, loosen 1/2-by-6-
inch u-bolts (1) that fasten transport-carrier mount onto
box frame. Slide transport-carrier assembly forward or
back as needed.
To adjust height of saddle, loosen 1/2-by-2-inch u-bolts (2)
that hold carrier tube to mounting bracket. Slide carrier
tube up or down as needed. Refer to Figure 3-14.
Figure 3-14
Marker Transport Carrier
15632