Great Plains YP2425F-2470 Operator Manual - Manual (Page 42)

38 YP2425 & YP2425F Table of Contents Index Great Plains Manufacturing, Inc.
401-406M Table of Contents Index 2014-07-14
Marker Unfolding
Overhead Hazard:
To prevent serious injury or death, do not allow anyone to
stand near or beyond the end of the wings during marker
operations. Marker arms are heavy and marker discs may be
sharp.
If your YP24 has markers, unfolding of the markers is
performed only after unfolding the wings.
The Marker/Aux valve on the left wing must be set to
“Marker”. See “Auxiliary Hydraulics” on page 47.
Before operating markers, make sure cylinders are
properly bled. See “Bleeding Hydraulics” on page 90.
This section presumes correct marker length for your
pass spacing. If this has not been set, or needs to be
changed, see “Marker Extension” on page 53
This section presumes correct marker chain slack. If your
chain has been replaced, repaired or stretched, adjust
the links to the correct slack length. See “Marker Chain
Length Adjustment” on page 54.
Dual markers are equipped with an automatic sequence
valve that controls which side activates, as well as
marker deployment.
Folding speed of dual markers is adjusted via set screws
on the sequence valve body. Excessive folding speed
may damage markers. See “Dual Marker Speed
Adjustment” on page 55.
Electrocution Hazard:
Beware of overhead electrical lines. If the markers contact
lines, the tractor, raised planter and any cart can become
“hot” with no indication. A person standing on the ground and
touching equipment can complete the circuit. Serious injury or
death is likely. At higher voltages electrocution can occur
without direct contact.
Figure 35
Marker Unfolding
26042