Great Plains YP1630F-1670 Operator Manual - Manual (Page 46)

42 YP1630F Table of Contents Index Great Plains Manufacturing, Inc.
401-832M Table of Contents Index 2012-12-27
Monitor Operation
For monitor operation in the field, refer to the
DICKEY-john® PM400 Console Manual manual supplied
with this unit, and the Seed Rate manual.
Fan General Operating Information
Dry fertilizer metering rate is set by the variable rate gear
box; however, the fan must be set to provide sufficient
manifold pressure to deliver the metered material from
the airbox to the rows.
Starting Fan
Use tractor remote hydraulic valve flow control to set fan
speed. Always start the fan with a low flow setting.
Monitor fan output with the Magnehelic
®
pressure gauge.
Gradually bring fan up to the pressure recommended for
your rate. Normal readings are in the 15 inches to
30 inches of water (H
2
O) range, and vary with material
properties and application rate.
At excessive rpm, too much air flow can cause:
• fertilizer to plug the air box
• oil heating
• slow lift times
• fan motor damage, over 5000 rpm
If desired pressure cannot be reached, chances are the
fan is running backwards. Reverse the inlet/return lines
at the hitch.
If air system does not operate suitably at suggested
pressures, see “Fertilizer Delivery Troubleshooting”
on page 68.
Stopping Fan
Move circuit level to Neutral, or slowly reduce rate to
zero.
15.0 170 3500
15.8 200 3600
17.9 250 3800
20.4 300 4000
23.4 350 4300
26.6 400 4700
15.0 150 3500
16.7 200 3700
19.4 250 3900
22.5 300 4300
26.1 350 4600
30.0 400 5000
Manifold
Pressure
Inches H
2
O
Application
Rate
kg/ha
Approximate
Fan Speed
rpm
Manifold
Pressure
Inches H
2
O
Application
Rate
pounds/acre
Approximate
Fan Speed
rpm
Equipment Damage Risk:
Make only gradual changes to fan hydraulic flow (other than
shifting to Neutral). Fan impeller inertia and momentum can
cause pressure spikes in the motor in response to abrupt
changes. This can cause motor seal damage.
Do not operate fan above 5000 rpm (30 inches on gauge).