Great Plains 1300 13-Foot Operator Manual - Manual (Page 30)

26 1300 and 1300F Table of Contents Index Great Plains Manufacturing, Inc.
175-157M Table of Contents Index 2014-04-15
Marker Operation (Option)
Prepare Markers for Field Use
If markers are not to be used for field operations, leave
the pins in their transport lock positions. There is no
harm in operating the lift circuit with markers locked up.
1. Set the lift circuit remote to Float to relieve pressure.
Set the circuit to Neutral to prevent movement. Shut
off the tractor.
Refer to Figure 22
2.
At each marker, remove the transport pin from the
(outboard) locking holes.
3. Move the pin to the (inboard) storage holes , and
secure with hairpin cotter.
If marker fold and unfold speeds are known to be
satisfactory, the markers are now ready for field use.
To adjust marker speed, see page 44.
Marker Field Operations
Markers share a common remote circuit with the lift
cylinder. Marker cylinders are controlled by an automatic
sequence valve that restricts oil flow to one marker at a
time.
• Whenever a lift operation is performed, an extended
marker folds.
• Whenever a lower operation is performed, a folded
marker extends.
You may need to allow extra time for both opener and
marker operations to complete, compared to just raising
and lowering openers.
Operating One Side Only
Leave the unused side in transport lock.
Operate the lift circuit twice for each raise and lower
cycle.
Two Sides Out
it is possible to both deliberately and unintentionally
deploy markers on both sides.
At the start of lower/unfold, briefly reverse the level for
the lift circuit, then resume lower (before the lowering
marker is fully raised). This causes the other side to
enter unfold as well.
If two markers are out unintentionally, perform a fold.
Upon the next unfold, only one side deploys.
Folding with Both Sides Out
Perform two complete lower/raise operations. The
markers fold one side at a time. Install lock pins as
appropriate for the next movement.
Figure 22
Marker Transport Pin Release
36274
1
2
Transport/Crush/Sharp Object Hazards:
Verify that the lift circuit is in Float or Neutral before
removing transport pins. Keep all persons well clear of
markers during lift/lower marker fold/unfold operations.
Un
-pinned markers fold and unfold when the lift circuit is
extended or retracted. Markers have multiple pinch points.
Lowering arms can crush. Marker disks are sharp.
1
2