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3PYP
Appendix C: Initial Setup
157
2018-07-24
401-312M
Hydraulic Down Pressure Calibration
If your planter is equipped with the optional hydraulic
down pressure system, it needs an initial/seasonal setup.
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.
There are two adjustable valves in the system:
Bypass valve
located near parallel arms
Adjustment valve
located near hitch
PC Closed Down Pressure
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
“
” on page 54 for field
operations.
Figure 156: s/n
Hydraulic Down Pressure Valves
29803
2
3
4
1