Great Plains 3PYP Operator Manual - Manual (Page 104)

100 3PYP Table of Contents Index Great Plains Manufacturing, Inc.
401-312M Table of Contents Index 2014-09-09
Bleeding Hydraulics
Bleeding procedures vary for different planter vintages:
s/n A1025S and higher: this page
s/n A1006S- (and lower): page 163
s/n A1007S to A1024S: page 163
When performing bleeds per the instructions in the
Maintenance section, be sure to use the procedure for
your implement.
Bleeding Lift Hydraulics
Normally the lift hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to raise fully and hold lever on for one minute or until all
cylinders extend fully.
If it is necessary to further bleed lift system, see
“Bleeding Lift Hydraulics” on page 101.
Bleeding Fold Cylinder Hydraulics
Normally the fold hydraulics are bled at the factory before
shipping, and 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.
If it is necessary to further bleed fold system, see
“Bleeding Wing Fold Cylinder Hydraulics” on
page 103.
Bleeding Marker Hydraulics
To fold properly, the marker hydraulics must be free of
air. If the markers fold in jerky, uneven motions, see
“Bleeding Marker Tilt Hydraulics” on page 104.
Sudden Crushing Hazard:
If the planter is folded, and it is suspected that the fold system
has air in it, DO NOT attempt to unfold before accomplishing
the full fold bleed procedure at “Bleeding Wing Fold Cylinder
Hydraulics” on page 103.
If the fold system has air in it, the wings can descend too fast.
Over-Torque Leak Risk:
Bleed only at
JIC (Joint Industry Conference, 37
°
flare) or
NPT (National Pipe Thread, tapered thread) fittings, and
never at
ORB (O-Ring Boss) or
QD (Quick Disconnect) fittings.
JIC fittings do not require high torque. JIC and O-ring fittings
do not require sealant.
Machine Damage Risk:
Do not fold or unfold without first raising planter completely.