Great Plains 3S-4010HDF Operator Manual - Manual (Page 34)

30 3S-4010HD and 3S-4010HDF Great Plains Manufacturing, Inc.
196-522M 03/28/2012 E
Marker Operation
Single (left side) or dual markers are optional on the 3S-
4010HD/HDF. See “Flat Fold Markers” on page 84 for
ordering information.
Single Marker Operation
The single marker is extended and retracted directly by
the tractor lever, and has a needle valve adjustment for
speed.
At the start of each pass, Extend the circuit to fully unfold
the marker, and return the lever to neutral. At the end of
each pass, Retract the circuit to fold the marker for the
turn, and return the lever to neutral.
Dual Marker Operation
Dual markers are on circuit which contains an adjustable
automatic sequence valve.
At first use, observe the markers carefully, in case the
side that unfolds is not the intended side.
When the circuit is first Extended, normally the right
marker unfolds, and the left remains in the cradle. When
the circuit is reversed (Retracted), the right marker folds,
and the left remains cradled.
When the circuit is next Extended and Retracted, the
marker on the opposite side unfolds/folds, and the previ-
ous marker remains cradled.
At the start of the first pass (assuming right marker
desired), Extend the marker circuit until the right marker
is fully unfolded. Set lever to neutral.
At the end of the pass, Retract the circuit until the right
marker is fully folded.
At the start of the next pass, Extend the circuit to deploy
the opposing marker.
Special Dual-Marker Operations
Passes with same marker side:
• Retract (raise) the marker and make the turn.
• Begin to extend the opposite marker.
• Retract it, and extend the original marker.
Both markers unfolded:
• Fully extend one side.
• Momentarily Retract, then Extend to deploy opposite
side.