Fan operation – Great Plains ADC2220 Operator Manual User Manual
Page 35
Great Plains Manufacturing, Inc.
Operating Instructions
31
2012-10-17
167-073M
Fan Operation
Fan speed is monitored and reported by the seed
monitor, but is manually controlled by the tractor circuit
lever. The optimum rate depends on the seed type, any
treatments. “Fan Speed Adjustment” on page 73 for
further information.
Refer to Figure 25
On newer air carts, there is a fan shut-off valve that must
must be open for the fan to operate.
1.
With the tractor at a low idle speed, energize tractor
hydraulics for fan. Lock hydraulic lever in place for
continuous operation. Refer to your tractor operator’s
manual for instructions on operating hydraulic motor.
Always engage the fan with the tractor at a low engine speed.
Engaging the fan when the tractor is at high speed may cause
fan damage.
2.
Check that the bottom of the fan rotor rotates toward
the rear of the cart. If not, reverse the direction of the
hydraulic flow from the tractor.
Do not reverse hydraulic flow with the fan running.
3.
Run fan for at least 15 minutes before seeding.
Hydraulic fluid must be warm before fan (and wing
down pressure on some implements) operates
properly.
Refer to Figure 26
The proper reading for the magnehelic air pressure gauge is
12 to 25 inches of water. A sudden drop in pressure is a sign of
a possible leak which can negatively affect seeding.
4.
Check bin-lid and meter-box seals for air leaks.
Adjust the latch or replace the seals to prevent
leakage.
Note: It only takes a very small air leak to cause large
variations in the seeding rate and pattern.
Do not exceed a fan speed of 5000 rpm. Set your monitor to
alarm before reaching this speed.
Figure 25
Y1078+ Fan Shut-Off
17172
Figure 26
Fan Air Pressure
26425