Great Plains 3N4010HDA Operator Manual - Manual (Page 33)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 29
2013-09-24 Table of Contents Index 196-444M
Fan Speed
This information is repeated from the air cart Operator’s
manual, which has additional guidance.
Machine Damage Risk:
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.
Do not reverse hydraulic flow with the fan running.
Fan speed is monitored and reported by the seed
monitor, but is manually controlled. The optimum rate
depends on the seed type and treatments. See “Fan
Speed Adjustment” in the cart Operator’s Manual for
further information.
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 adversely affect seeding.
Marker Operation
Single (left side) or dual markers are optional on the
3N-4010HDA. See “Flat Fold Markers” on page 71 for
ordering information.
Markers share the hydraulic circuit with the Fold circuit.
The selector valve is present to select between Marker
and Fold circuits.
Set Selector Valve
Refer to Figure 26
(front view depicting valve set to Markers)
Before operating markers, make sure the drill is
configured for the planned field operations or marker
maintenance, and the set the drill selector valve to
enable the marker hydraulic circuit.
Recommended Fan Speeds
Seeds Fan RPM
Sunflowers 2,250 - 3,000
Wheat 3,250 - 4,000
Soybeans 2,750 - 3,500
Milo 3,250 - 4,000
Figure 25
Fan Air Pressure
26425
Figure 26
Drill Selector Valve
21844