Great Plains 3S-4000F Operator Manual - Manual (Page 80)

76 3S-4000 Table of Contents Index Great Plains Manufacturing, Inc.
195-394M Table of Contents Index 2014-06-10
Bleeding Fold Hydraulics
Refer to Figure 85
1.
Check hydraulic fluid level in tractor reservoir and fill
to proper level. Add fluid to system as needed.
2. With drill unfolded and fold cylinders completely
extended, disconnect rod end pins and swing the
cylinders so they will not contact anything when
extended.
3. Loosen rod end hose fitting at elbow on right fold
cylinder.
Note: Do not loosen an O-ring fitting for bleeding.
Bleeding air from an O-ring fitting will damage the
seal.
4. Slowly supply oil to rod end of fold cylinders until oil
appears at loosened hose fitting. Tighten fitting and
completely retract fold cylinders.
5. With cylinders completely retracted, loosen base end
hose fitting
at elbow on right fold cylinder.
6. Slowly supply oil to base end of fold cylinders until oil
appears at loosened hose fitting. Tighten base end
hose fitting and cycle fold cylinders in and out
several times.
7. Re-pin cylinder rod clevis.
Figure 85
Bleeding Fold Hydraulics
18958
1
2