Marker adjustments, Marker extension – Great Plains PD8070 Operator Manual User Manual
Page 44
40
PD8070
Great Plains Manufacturing, Inc.
401-479M
2014-07-23
Marker Adjustments
There are four adjustments for markers:
• Marker Width
Once set for a specific row spacing, this only needs
periodic checking to ensure the clamp is secure.
• Disk Angle
Even if your row spacing rarely changes, you may
need to adjust disk angle for soil conditions and
planting speed.
• Marker Fold/Unfold Speed
Once initially set by your dealer, this rarely needs
modification.
• Shear Bolt Replacement
If a marker hangs up on an obstruction, a bolt at the
fold is designed to fail. See “Marker Shear Bolt” on
page 66.
Overhead Crushing and Sharp Object Hazard:
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Never allow anyone near the planter when folding or
unfolding the markers.
Marker Extension
Refer to Figure 37
To adjust marker width, loosen (but do not remove) the
nuts
on the marker tube u-bolt
.
Slide marker tube in or out to dimension
. After
adjusting, retighten u-bolt.
Marker Extension
is measured from the center line of
the planter to the marker disk. The dimensions provided
are approximate. After adjusting, field check the actual
dimension.
Marker Extension
= 6.096 m (18 feet 7 inches)
3
2
1
Figure 37
Marker Extension
25450
1
2
3
3
3