Great Plains 3PYP Operator Manual - Manual (Page 164)

160 3PYP Table of Contents Index Great Plains Manufacturing, Inc.
401-312M Table of Contents Index 2014-09-09
PC Closed Down Pressure (S/N A1006S-)
Tractors with Pressure Compensating Closed Center
Hydraulics (PC Closed)
Refer to Figure 155
1. Release locking disk .
2. Close bypass valve for no oil flow by turning
knob on valve clockwise completely.
3. Tighten locking disk . Always operate the planter
with the bypass valve closed.
No further adjustments are made at this time. See
“Hydraulic Down Pressure” on page 52 for field
operations.
PC Closed Down Pressure (S/N A1025S+)
Tractors with Pressure Compensating Closed Center
Hydraulics (PC Closed)
Refer to Figure 156
1. Release locking disk .
2. Close bypass valve for no oil flow by turning
knob on valve clockwise completely.
3. Tighten locking disk . Always operate the planter
with the bypass valve closed.
No further adjustments are made at this time. See
“Hydraulic Down Pressure” on page 52 for field
operations.
Figure 155: s/n A1006S-
Hydraulic Down Pressure Valves
25239
2
2
4
3
1
3
1
4
3
Figure 156: s/n A1025S+
Hydraulic Down Pressure Valves
29803
1
2
3
4
3
1
4
3