Great Plains 3PYPA Operator Manual - Manual (Page 91)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 87
03/20/2012 Table of Contents Index 401-647M
Seed Pool Troubleshooting
Null4:
Null4:
Null4:
Figure 118
Rear Cross-Section of Air-Pro
®
Meter in Normal and Row-Failed Conditions
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Normal:
Filling
Normal:
Filled
Delivery Blockage or
Back-flow Starvation Bridging:
Screen
Bridging:
Shutter
Seed pool at shutter pre-
vents back-flow of meter
pressurization air, allow-
ing seed to flow from
delivery system, filling
inlet to top of air release
screen. Once inlet is filled to top
of air release screen, air
flow from the delivery
system is blocked. No
further seed arrives until
planting reduces the
backlog at the inlet. No seed arriving from
manifold. Air back-
flow
is occurring.
Causes may include:
• low fan speed
• seed hose blockage
• no seed available
• Y-tube closed
• meter never primed
Oversize matter in seed
has caused a bridge at
the top of the inlet. Air
back-flow
is occurring.
When the bridge is
released, the seed pool
will be insufficient to pre-
vent back-flow.
A bridge at the shutter is
blocking flow. Causes
may include:
• oversize seed
• shutter setting too low
• oversize matter in
seed
Actions: Actions: Actions: Actions: Actions:
No action required.
Continue Planting.
No action required.
Continue Planting.
1. Correct cause of
blockage.
2. Perform a one-
row seed pool
recovery
(page 88).
3. Resume planting.
1. Close shutter.
2. Disconnect hose
at meter.
3. Tap on screen
cone and inspect.
4. Check seed pool
for foreign matter.
5. Perform a one-row
seed pool recovery
(page 88).
6. Resume planting.
1. If shutter was at
suggested open-
ing, increase one
notch.
2. Check seed pool
for foreign matter.
3. Resume planting.
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