Fold cylinder bleeding, Bleeding marker hydraulics, Marker cylinder bleeding – Great Plains YP2425F-2470 Operator Manual User Manual
Page 95
Great Plains Manufacturing, Inc.
Maintenance and Lubrication
91
2014-07-14
401-406M
Fold Cylinder Bleeding
Begin with planter raised and lift cylinder locks
installed.
2.
Un-pin cylinder rod ends. Orient cylinders so that rod
ends may extend without striking planter parts.
3.
Loosen the JIC fittings
cylinders.
4.
Extend the circuit until liquid (non-foamy) appears at
the loosened fittings and cylinders are fully
ex-tended. Set circuit to Neutral and secure fittings.
5.
Loosen the JIC fittings
,
at the rod end of all fold
cylinders.
6.
Retract the circuit until fluid appears at all fittings. Set
circuit to neutral and secure fittings.
7.
Extend cylinders and re-pin cylinder rod ends.
Bleeding Marker Hydraulics
To fold properly, the marker hydraulics must be free of
air. If the markers fold in jerky, uneven motions, see
“Marker Cylinder Bleeding” on page 91.
Marker Cylinder Bleeding
Begin with planter unfolded and lowered, and with
both marker sides extended. See “Unusual Marker
Operations” on page 39.
2.
Note the position of the gravity pin lock (above and
latched on rod-end pin when folded, hanging down
when unfolded).
3.
Un-pin the rod end of the marker cylinders, and
orient the cylinders so that the rods may extend
without striking marker components.
4.
Loosen the JIC fitting
marker cylinder.
5.
Extend the circuit until fluid appears at the loosened
fittings. It may be necessary to extend-retract-extend
to cycle the sequence valve to that marker. Set
circuit to Neutral. Secure fittings.
6.
Loosen the JIC fitting
at the rod end of that same
marker cylinder.
7.
Retract the circuit until fluid appears at the loosened
fittings. Set circuit to Neutral. Secure fittings.
8.
Repeat for the other side.
9.
Re-orient gravity pin lock to position noted at step 2.
10. Re-pin marker rod ends.
Figure 120
Fold Bleed
29579
3
1
2
4
Figure 121
Marker Bleed
26131
2
1
1