YP3025A
Operating Instructions
45
2019-06-12
401-705M
Fan General Operating Information
Use tractor remote hydraulic valve flow control to set fan
speed. Always start the fan with a low flow setting.
Monitor fan rpm with the seed monitor.
Gradually bring fan up to the recommended initial rpm.
The split-air servo vane engages only above 50 rpm.
Do not run the fan over 3500 rpm or at speeds under
2000 rpm.
At excessive rpm, too much air flow can cause:
•
seed to plug the air box
•
seed suspension in a bulk seed box
•
oil heating
•
slow lift times
If the rpm is too low, the split-air system may divert
nearly all the air to the meter pressurization, leaving
none for seed transport (or just enough to plug low spots
in seed hoses).
The monitor console can report meter pressurization.
There is also a Magnehelic® air pressure gauge. These
two readings should not disagree by more than a few
tenths of an inch.
The Seed Rate manual provides initial values for
meter pressurization. Normal readings are in the
0.8 inch to 4.0 inch water pressure range, and vary
considerably with crop.
If at suggested fan rpm, desired pressure cannot be
reached, chances are the fan is running backwards. If
the rpm and meter pressurization readings are correct,
but the meters are starved of seed, the fan may be
running backwards and the meter pressurization system
is taking all the air, leaving little or none for seed delivery.
Reverse the inlet/return lines at the hitch.
If air system does not operate suitably with fan speeds
between 2000 and 3800 rpm, see “
When starting empty you must blow seed out to the
meters for two to four minutes to fill meters.
During “FILL METER”, all air is routed to the air box,
and none to the meter pressurization system.
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.
Steps for setting and adjusting the air system are found
at “
Recommended Fan Speeds
Low Population Risk at Turns:
The figures above do not include oil for lift/lower or oil for
marker operation. Aggressive lift/lower operations, and
simultaneous lift/marker operations, can reduce fan rpm below
that needed to pressurize meter disks. If seed falls out of
pockets, low population bands will occur shortly after turns.
Unless the tractor has generous oil flow capacity, raise/fold
markers before lift, and lift slowly. Watch manifold pressure
and tune operations to keep it at planting levels in turns.
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
1
/
3
cup (80 ml) Ezee
Glide Plus to bottom of airbox.
YP3025A
Bulk Box
Initial Fan Speed
2700 rpm
2500 rpm
11.6 gpm
11.2 gpm
44 liters/min
42 liters/min
4.5 gpm
4.5 gpm
17 liters/min
17 liters/min
16.1 gpm
15.7 gpm
61 liters/min
59 liters/min
Fan Speed Range
2300 - 3500 rpm 2300 - 3200 rpm
9.9 - 12.9 gpm
9.9 - 12.4 gpm
37 - 49 lpm
37 - 47 lpm
4.5 gpm
4.5 gpm
17 liters/min
17 liters/min
16.1 - 15.7 gpm
14.4 - 16.9 gpm
61 - 59 lpm
54 - 64 lpm
² Does not include oil for lift/lower or markers.
Seed Hopper¹
Fan Oil
Consumption²
Hydraulic Drive Oil
Consumption²
Total² Oil, Motors,
Initial Speed
Fan Oil
Consumption²
Hydraulic Drive Oil
Consumption²
Total² Oil, Motors,
Speed Range
¹ This assumes a 2007+ Great Plains hopper, or older hopper
with the vent line update. For an older unvented hopper, use the
rpms recommended for ProBox.
