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3PYPA
Table of Contents
Index
Operating Instructions
Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
33
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 system 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 30
1. Verify that steering circuit hydraulic hoses are
connected 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 (12.9 km/h). This state change is
indicated by Float LED illumination.
•
The steering hydraulics can consume up to 4 gpm
during turns. If the tractor hydraulic flow is marginal,
commence 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.
Machine Damage Risk:
Reverse only with properly 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 30
Normal Steering Control
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