Great Plains PH-20 Operator Manual - Manual (Page 30)

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Section 3 Adjustments
PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M 12/29/2011
Great Plains Mfg., Inc.
Marker Adjustments
Folding Speed
Adjust folding speed with hex adjustment screws on the
sequence-valve body. See . 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 counterclock-
wise to increase folding speed. Excessive folding speed
could damage markers and void the warranty.
After adjusting folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Figure 3-18
Speed Adjustment, Sequence Valve
Marker Width
Refer to .
To adjust marker width, loosen marker tube u-bolt (1) and
slide marker tube in or out as necessary. After adjusting,
retighten u-bolt.
Figure 3-19
Marker Width Adjustment
14048
15835
Disk Adjustments
The mark left by the marker disk may be changed by two
methods.
Refer to Figure 3-20.
1. Disk Angle
To change the angle of cut, loosen bolts (1), rotate
spindle assembly (4) and retighten bolts.
2. Direction of Cut
To change the direction the disk cuts:
a. Remove four lug bolts on disk hub and reverse
depth band (2) and blade (3). Reinstall lug bolts.
b. Remove bolts (1) and spindle assembly (4). Rein-
stall spindle assemble so it is on top of marker
tube. Tighten all bolts.
Figure 3-20
Marker Disk Adjustments
17928