Great Plains V-300F Operator Manual - Manual (Page 44)

40 V300 & V300F Great Plains Manufacturing, Inc.
148-057M-A 11/15/2007
Marker Operation
Optional markers are usually operated on a separate
hydraulic circuit.
Note: Selector valves are available to allow markers to
share the tongue cylinder circuit. Set selector
valve to Markers after setting coulter depth with
tongue cylinder.
Dual Marker Operation
1. Extend the circuit and observe which marker side
begins unfolding.
If it is not the desired side, move lever to Retract.
When fully folded, move lever to Extend. The auto-
matic sequence valve switches the circuit to the
other marker.
2. When marker is fully extended, move lever to neu-
tral.
3. At concentric pass end turns, retract circuit slightly
before turn, to lift marker disk safely above ground.
At opposing pass end turns, retract marker fully.
The automatic sequence valve switches the circuit
to the other marker.
4. Move lever to Extend, unfolding either the same
side (concentric pass), or the opposite side (oppos-
ing pass).
5. After last pass, Retract the circuit completely to fold
the marker.
6. Set circuit to neutral.
Pre-Emergence Marker Operation
Optional pre-emergence, or tramline markers are con-
trolled by solenoid valves on the same circuits as the
tramline clutches.
The tramline markers are normally in the lifted state. If
tramlining is enabled in the monitor, they are lowered
automatically during tramline passes.
See also “Pre-Emergence Marker Setup” on page 27.