Great Plains 2510HDF Operator Manual - Manual (Page 29)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 25
2013-11-11 Table of Contents Index 288-340M
Marker Operations
Optional marker attachments are available from your
Great Plains dealer. Before operating markers, make
sure hydraulics are properly bled as described under
“Bleeding Marker Hydraulics” on page 52.
Set hydraulic circuit lever to neutral when folding or
unfolding is complete. When extended, Great Plains
markers are self-floating over uneven ground. When
folded, neutral locks the marker in the transport cradle.
Independent Markers
Supply oil to the cylinder base end of the marker you
wish to extend. When fully extended, set the circuit lever
to neutral.
Reverse the circuit to fold the marker. When fully resting
in the transport cradle, set the circuit lever to neutral.
Dual Auto-Sequenced Markers
Dual markers on twin dedicated circuits operate the
same as single markers, above.
Dual markers equipped with a sequence valve share the
same hydraulic circuit.
Starting with both markers folded, activate (normally
Extend) the circuit, then set the control to neutral. The
folding sequence is:
• Activate lever - One side unfolds. The other stays
folded.
• Reverse lever - Unfolded side retracts. The other stays
folded.
• Activate lever again - Side that remained folded previ-
ously now unfolds. Original side remains folded.
• Reverse lever - Unfolded side retracts. Original side
remains folded.
• Sequence repeats.
You can adjust dual marker folding speed. See “Marker
Speed” on page 29, and adjust folding speed to a safe
rate. Folding markers at high speed can damage
markers.
Both Sides Extended (Sequenced)
1.
Activate lever to extend one side.
2. Reverse lever as if to retract, and quickly reverse
again.
3. Extend the other side.
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