
2018-07-30
401-805M
YP4425A
Operating Instructions
44
Airbox Operation
The function of the airbox
is to mix seed with turbulent
air from the hydraulic fan, which then exits through a
manifold (not shown) to the seed tubes which serve the
row unit meters.
Before the first planting each season, or when using
new meters or meter wheels for the first time, or at the
start of each season, before filling with seed, add
1
/
3
cup (80 ml) graphite to bottom of airbox.
When starting empty you must blow seed out to the
meters for two to four minutes to fill meters.
The monitor has a level sensor below the hopper or seed
box to warn when seed box is empty. There are three to
four acres of seed in the system when the sensor first
indicates box empty, depending on seeding rate.
Weight Transfer Operation (Option)
This option provides a control valve
, plumbed into the
hydraulic drive circuit, and a cylinder
for each wing.
Up to 1000 pounds (450 kg) of mainframe weight may be
transferred to each wing when oil is being supplied to the
hydraulic drive circuit.
Once set, the circuit usually requires little adjustment in
normal field operations. To set the circuit:
1.
Unfold and lower the planter in field conditions.
2.
Supply oil to the hydraulic drive circuit (or operate the
PTO at field rpm if using a PTO pump that supplies
the hydraulic drive). The hydraulic drive motor itself
does not need to be operated.
3.
Loosen the lock disc
at the valve block. Adjust the
knob
until the gauge
reads approximately
1000 psi. Tighten the lock disc.
4.
Lower the planter. Engage the hydraulic drive (with
seeding disabled) Pull forward at normal field speed
for a short distance. Stop.
5.
Check that the wings are level.
See page 15 and page 153 for important information
about movements without a suitable tractor. See
page 124 for ordering information.
•
If the wings ends are lower than the center,
decrease the pressure at the valve
.
•
If the wing ends are higher than the center,
increase the pressure.
A relief valve in the valve block prevents any
damage from over-pressure.
Figure 46
Air Box
29309
1
Figure 47
Weight Transfer Valve and Cylinder
36421
2
1
4
3
5
Содержание YP4425A
Страница 168: ...Cover Table of Contents Cover Table of Contents...
Страница 169: ...Table of Contents Index Table of Contents Index...
Страница 170: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402...