Great Plains 2S-2600HDF Predelivery Manual - Manual (Page 23)

Great Plains Manufacturing, Inc. Setup 21
08/01/2007 195-069Q
Bleeding Opener Lift Hydraulics
Refer to Figure 25
1. Review warnings, bleeding notes and system infor-
mation on page 20.
2. Make sure opener frames are locked up in ROAD
position. Refer to Opener Lock Up in Operator’s
Manual.
3. Turn knob on both pressure-control valves com-
pletely counterclockwise, then turn valves clockwise
far enough to build up 1000 psi (about three turns).
4. Turn knob on bypass valve completely clockwise
for no oil flow.
5. Loosen two hose-end JIC fittings on the opener-
lift circuit where these center two hoses tee at the
middle of the mainframe.
6. Slowly supply oil to top side of pressure-control
valves until oil begins to appear at a loosened hose
fitting. As oil begins to appear at a fitting, tighten that
fitting.
7. Slowly supply oil to bottom side of pressure-control
valves until oil begins to appear at remaining loos-
ened hose fitting. As oil begins to appear at the fit-
ting, tighten fitting. Continue to supply oil to bottom
side of pressure-control valves until all openers are
raised completely.
8. Move opener transport locks to FIELD position and
cycle openers up and down ten times. Each time you
lower openers, hold tractor remote lever until opener
circuit builds up to pressure set at control valves.
9. After cycling openers, return opener transport locks
to ROAD position, and lock openers up.
Figure 23
Bleeding Opener Lift Hydraulics
22981
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