Great Plains YP4025A Operator Manual - Manual (Page 50)

46 YP4025A Table of Contents Index Great Plains Manufacturing, Inc.
401-627M Table of Contents Index 2013-04-24
Steps for setting and adjusting the air system are found
at “Fan and Adjustment” on page 63.
Y-Tubes
Refer to Figure 47
Y-tube gates can be shut off to feed only one row for
single-row planting on a twin-row machine. In the
photograph, the left meter tube is open and the right
closed.
You can also shut off the Y-tube gates to clean out the air
system and meters. See “Row Unit Shut-Off” on
page 84.
Airbox Operation
Refer to Figure 48
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.
Note: 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.
Monitor Operation
Monitor operation is described in a separate manual
supplied with your YP4025A Planter.
Operations covered in that manual (and therefore not in
this manual) include:
• hydraulic drive control
• seed rate calibration
• planting rate
• fertilizer rate
• setting rate limits and detecting out-of-limits
• GPS integration
• fan rpm
Figure 47
Seed Y-Tube
29758
Figure 48
Air Box
29309
1
1
Figure 49
Seed Monitor Console
29801