Great Plains YP4425A Operator Manual - Manual (Page 155)

Great Plains Manufacturing, Inc. Table of Contents Index Appendix B - Initial and Option Setup 151
2012-02-23 Table of Contents Index 401-805M
Hopper Level Sensor Installation
Regardless of hopper/seed box used, the YP4425A
planter includes a factory-installed seed level sensor in
the airbox.
If a 403-143K 82 bu. or 403-174K 150 bu. hopper was
ordered with the planter, it includes an 833-235C hopper
level sensor which is not factory-installed. This sensor
can provide a second, earlier, low seed level alarm.
Use of this sensor is optional, and level placement is at
your discretion. To install:
1. Perform the installation before first use of the hopper.
The sensor body is mounted inside the hopper. It
can be dangerous to enter a hopper if it contains any
seed, or has ever been used with treated seed.
2. Refer to Figure 37 on page 35, or Figure 38 on
page 36 for placement elevations based on
remaining hopper capacity. Great Plains suggests
mounting the sensor on the lower front wall of the
hopper.
3. Follow the steps in DICKEY-john
®
instruction sheet
11001-1126 to install the sensor.
4. Use silicone to seal the cable at the grommet, and
around the grommet, to prevent air leaks which can
interfere with consistent seed delivery.
After the hopper is mounted on the planter, the leads
connect to the “HOPPER 2” harness lead located below
the hydraulic drive in the planter center section.
Radar Calibration
At the first opportunity to operate the planter in the field
(with or without planting), the radar component of the
seed monitor needs to be calibrated. The seed monitor
manual describes the procedure.
Note: The planter must be in the lowered/field position for
this calibration. The angle of the sensor changes
when the planter is raised, and readings during
planting will be incorrect if calibrated in the raised
configuration.
Note: Due to this angle change, seed monitor speed
readings will not match tractor speedometer
reading during transport.
Figure 144
833-235C Hopper Level Sensor
29328
Figure 145
Radar
29302