Bleeding marker hydraulics – Great Plains 3S-4000HDF Operator Manual User Manual
Page 83
Great Plains Manufacturing, Inc.
Maintenance and Lubrication
79
2013-06-13
195-067M
Bleeding Marker Hydraulics
Overhead Crushing Hazard:
Never allow anyone near the drill when folding or unfolding
markers. You may be injured if hit by a folding or unfolding
marker. Markers may fall quickly and unexpectedly if the
hydraulics fail.
1.
Review warnings, bleeding notes and system
information on page 75.
Refer to Figure 86
2.
With markers unfolded in field position, crack
hydraulic-hose JIC fittings
at base and rod ends of
each marker cylinder.
3.
With tractor at idle speed, activate tractor hydraulic
valve forward until oil appears at a fitting. When oil
begins to seep out around a fitting, tighten that
fitting. Reverse the tractor hydraulic valve until oil
appears at opposite hose fitting. Tighten that fitting.
4.
If you have dual markers, activate tractor hydraulic
valve forward again until oil seeps out around a fitting
on the other marker cylinder. Tighten that fitting.
Reverse tractor hydraulic valve until oil seeps out
around remaining hose fitting and tighten it.
5.
Fold and unfold markers slowly to work out all air.
Note: Use caution when folding and unfolding markers
for the first time, checking for pinching and kinking
of hoses.
Figure 86
Bleeding Marker Hydraulics
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