Great Plains YP1625 Operator Manual - Manual (Page 54)

50 YP1225 and YP1625 Great Plains Manufacturing, Inc.
401-226M-A 03/12/2012
Hydraulic Drive Height Switch
The optional Hydraulic Drive is supplied with a height
switch
that is used to activate the Drive when the
planter is lowered for field operation.
Refer to Figure 63
1.
Loosen the bolts holding the height switch bracket
and rotate the switch
and bracket away from the
frame pivot .
2. Lower the planter to the height at which seed deliv-
ery should begin.
3. Rotate the switch towards the frame pivot until the
spring actuator
just touches the frame.
4. Rotate the switch in until it clicks. Tighten the bolts to
secure it in place. Be sure frame tube will not crush
switch when unit is fully loaded.
Note: It may be necessary to loosen the screws holding
the switch and rotate the switch slightly on the
bracket.
Fan Adjustments
Recommended fan butterfly valve setting is 0 ° . Recom-
mended fan speed depends on planter configuration:
Adjust the basic fan rate with the tractor hydraulic system
and fan rpm display on seed monitor. Do not run the fan
over 4500 rpm or under 3000 rpm.
Fans operating at too high a speed create too much air
flow causing seed to plug up the meter box. Fans operat-
ing too slowly do not create enough air flow to push the
seed to the meters, causing the seed tube to plug. If air
system does not operate suitably with fan speeds
between 3000-4500 rpm, refer to the troubleshooting
chart, and then adjust the fan butterfly valve.
The butterfly valve may be helpful if your tractor can
maintain a high, but irregular fan rpm. Set the rpm to
above 3500 rpm with the valve completely open (0
° ).
Adjust the valve angle in the 20-30 ° range until you
achieve the desired seed flow consistency.
3800 rpm 82bu (2890 l.) or 150bu (5290 l.) hoppers (or
pre-2007 hoppers with the vent line update)
3500 rpm bulk seed boxes or older unvented hoppers
FigureSpacer:
Figure 63
Hydraulic Drive Height Switch
23398
4
1
2
3
1
2
1
3
4
FigureSpacer:
Figure 64
Fan Butterfly Valve
25267