Steering operation – Great Plains 3PYPA Operator Manual User Manual
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3PYPA
Great Plains Manufacturing, Inc.
401-647M
03/20/2012
Steering Operation
Tire Shoving/Cart Shift Risk:Keep everyone off and away from
the seed cart when starting up steering system. Casters move
rapidly to match current tractor steering once the steering sys-
tem is engaged and tractor hydraulics are active. This could be
a large motion, possibly a full left-to-right pivot operation,
resulting in a shove or fall, and minor to moderate injury.
Refer to Figure 26
1.
Verify that steering circuit hydraulic hoses are con-
nected to a power-beyond port.
2.
Set steering CALIBRATION switch
to center-off.
3.
Set STEER switch
to on.
4.
Check that main indicator LED
is on steady.
The system operates automatically after this point. Keep
in mind:
• Casters transition from active steering to Float mode
above 8.0 mph. This state change is indicated by Float
LED
illumination.
• The steering hydraulics can consume up to 4 gpm dur-
ing turns. If the tractor hydraulic flow is marginal, com-
mence turns after completing marker fold and planter
lift operations. Complete turns before lowering planter
and unfolding marker.
• When the steering system is off, or any fault occurs,
the casters are set to Float mode. Make only careful
forward moves in these cases.
Null4:
Machine Damage Risk:
Reverse only with functioning steering. If the casters are in
Float due to a fault, because the steering system is shut off, or
during operations with a non-steering-equipped tractor, make
only careful FORWARD moves. In any reverse moves in Float,
the casters quickly pivot in a random direction until they hit
their stops. The planter attempts to turn the tractor in that
direction. Planter damage is likely.
Figure 26
Normal Steering Control
29895
3
2
1
4
4
1
2
3