Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
172
3PYPA
Table of Contents
Index
Appendix B - Initial and Option Setup
Hydraulic Down Pressure Calibration
(Option)
If your planter is equipped with the optional hydraulic
down pressure system, it needs an initial/seasonal
setup.
Equipment Damage Risk:
If your tractor has Open Center hydraulics, do not engage the
down pressure hydraulics. The current hydraulic down
pressure option is compatible only with tractors having Closed
Center systems.
The hydraulic down pressure kit is integrated with the
lift assist system. When the down pressure system
cycles, the planter raises and lowers.
Refer to Figure 177
There are two adjustable valves in the system:
PC Closed Down Pressure Calibration
Tractors with Pressure Compensating Closed Center
Hydraulics (PC Closed)
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 63 for field
operations.
Bypass valve:
located near parallel arms
Adjustment valve:
located near hitch
Figure 177
Hydraulic Down Pressure Valves
29803
1
2
3
4
1
2
3
1
3
