Fan speed adjustment, Hydraulic fan start-up – Great Plains ADC2220 Operator Manual User Manual
Page 77
Great Plains Manufacturing, Inc.
Adjustments
73
2012-10-17
167-073M
Fan Speed Adjustment
Fan speed (rpm) is available on the seed monitor. Have
the seed monitor powered up for fan adjustments.
Refer to Figure 95
Fan shut-off valve (if present) must be open for fan to
operate.
Hydraulic Fan Start-Up
With the fan shut-off valve open, and 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.
Machine Damage Risk:
Always engage the fan with tractor engine at low rpm.
Engaging the fan when the tractor is at high speed may cause
fan damage.
Check the fan speed with tractor engine at field rpm. Low/idle
engine rpm may provide a false setting, as pump output is
reduced.
Do not operate the fan above 5000 rpm at any time.
Check that the bottom of the fan rotor rotates toward the
fan outlet port. If not, reverse the direction of the
hydraulic flow from the tractor.
Run fan for at least 15 minutes before seeding. Hydraulic
fluid must be warm before fan and wing down pressure
will operate properly.
1.
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.
2.
Advance tractor throttle to increase engine rpm to
expected field range.
Figure 95
Y1078+ Fan Shut-Off
17172
Figure 96
Fan Air Pressure
26425