fan impeller is spinning in the correct direction (toward air
exit port). Air moves toward the air box in either direction
of fan rotation, but reverse spinning airflow is too low to
operate the air box.

Start with flow on low setting. 8-12 gpm (30-45 liters/min)
is average flow.

Note: Do not apply pressure to the return line or operate

with restricted return line or motor seals will be
damaged.

Recommended butterfly valve setting is 0

Recommended fan speed depends on planter
configuration:

Do not run the fan at speeds over 4500 rpm or speeds
under 3000 rpm. A fan speed too high creates too much
air flow causing seed to plug up the meter box. Fans
operating too slowly do not create enough air flow to
push the seed to the meter, causing the seed tube to

plug or meters to run empty. If air system does not
operate suitably with fan speeds between 3000-4500
rpm, refer to the troubleshooting chart, and then adjust
the fan butterfly valve. See “Fan Adjustments” on
page 58.

Watch monitor and adjust fan speed by increasing or
decreasing hydraulic flow from tractor.

When starting empty you must blow seed out to the
meters for two to four minutes to fill meters.

The monitor has a level sensor below the hopper or seed
box to warn when seed box is empty. There are three to
four acres of seed in the system when the sensor first
indicates box empty, depending on seeding rate.

Note: Before the first planting each season, or when

using new meters or meter wheels for the first
time, or at the start of each season, before filling
with seed, add

⁄

cup (80 ml) graphite to bottom

of airbox.

Figure 44

Fan and Air Box

26045

3800 rpm planter using 2007+ 82bu or 150bu hoppers

(or older hoppers with the vent line update)

3500 rpm planter using bulk seed boxes or unvented

hoppers

This manual is related to the following products:

YP2425 Operator Manual