Great Plains YP1625 Operator Manual - Manual (Page 19)

Great Plains Manufacturing, Inc. Preparation and Setup 15
07/09/2009 401-226M
Hydraulic Charge and Bleed
Normally the hydraulic system is fully charged and bled
at the factory before shipping. If repairs have been made,
substantial amounts of oil drained from the system, or
the following procedures do not correct a problem, see
“Bleeding Hydraulics” on page 70.
Lift Hydraulics
Bleeding should not be required other than to raise fully
and hold lever on for one minute or until all cylinders
extend fully. If this does
Cylinder Hydraulics
Bleeding should not be required other than to fold fully
and hold lever on for one minute or until all cylinders
reach the end of their stroke.
IMPORTANT !
Do not fold or unfold without first raising planter com-
pletely.
Leveling Frame Side-to-Side
All frame sections must be level to maintain even plant-
ing depth. Before using the planter in the field, follow
these steps to make sure the planter is level side-to-side.
Periodic frame-leveling adjustments should not be nec-
essary, but if you are having problems with uneven
depth, check planter levelness and follow these proce-
dures.
Before making any adjustments be sure the lift cylinders
are re-phased and operating properly.
Complete the steps under “Hydraulic Charge and
Bleed” on page 15, before proceeding.
Note: Level frame in planting conditions. Failure to do so
may result in machinery not producing desired re-
sults.
Refer to Figure 8
1.
Unfold the planter fully and set down. Put in field
position by lowering and pulling forward.
2. When setting hitch, lower lift cylinders completely.
Set the 3-point hitch or hydraulic tongue so that the
top of the tongue tube
is:
46in above ground for YP12, or
42in above ground for YP16.
This is the starting point for adjustments.
IMPORTANT !
Planter must be fully lowered to field position and
hitch height must be set before making side-to-side
adjustments.
Figure 8
Base Height
25316
1
1