Great Plains 4000-3S Assembly Instructions - Manual (Page 11)

2/28/2006 113-728M
Great Plains Mfg., Inc.
11 Installation Instructions
Bleeding Marker Hydraulics
!
CAUTION!
You may be injured if hit by a folding or unfolding
marker. Markers may fall quickly and unexpectedly if
the hydraulics fail. Never allow anyone near the drill
when folding or unfolding markers.
Refer to Figure 15
1. Make sure tractor hydraulic reservoir is full.
2. With markers unfolded in field position, crack
hydraulic-hose fittings (1) at base and rod ends
of each marker cylinder.
3. With tractor at idle speed, activate tractor hy-
draulic valve forward until oil appears at one fit-
ting. When oil begins to seep out around a
fitting, tighten that fitting. Reverse the tractor
hydraulic valve until oil appears at opposite hose
fitting and tighten that fitting.
4. If you have dual markers, activate your tractor
hydraulic valve forward again until oil seeps out
around one fitting on the other marker cylinder
and tighten that fitting. Reverse tractor hydrau-
lic 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.
6. Adjust marker folding to a safe speed. Refer to
Marker Adjustment in the operator’s manual.
Figure 15
Bleeding Marker Hydraulics
18942