Great Plains 3S-4010HDF Operator Manual - Manual (Page 69)

Great Plains Manufacturing, Inc. Maintenance and Lubrication 65
03/28/2012 196-522M
Bleeding Fold cylinders
Note: Unfolding drill retracts fold cylinders.
Note: If markers are on a selector valve, select Fold at
that valve for this procedure.
1. Unpin rod ends of fold cylinders. Pivot cylinders up
and wire or otherwise safely support rod ends higher
than base ends.
2. With the tractor engine at idle speed, energize the
fold hydraulics. When the cylinders have extended
completely, hold the remote lever on for one minute.
Check all hydraulic hoses, cylinders and fittings for
leaks.
3. Retract the cylinder rods. Extend the rods again and
hold the remote lever on for one more minute.
Repeat this step two more times.
4. Again, check all hydraulic hoses, cylinders and fit-
tings for leaks. Recheck the tractor hydraulic reser-
voir. Fill to the proper level.
5. Re-pin both cylinders.
Adjusting Fold Cylinders
Refer to Figure 76
If the drill does not fold or unfold fully it may be neces-
sary to add or remove shims from the base of the wing
fold cylinder.
1. With the drill in the folded or unfolded position make
sure drill is on level ground and all safety locks are in
place.
2. Place tractor in park, turn off ignition and remove
ignition key.
3. Remove bolts from cylinder base plate and add or
remove shims as necessary.
4. Tighten fold cylinder base bolts and activate fold cyl-
inders to make sure wings travel to full open and full
closed position. If not repeat above steps until full
open and full closed are achieved.
FigureSpacer:
Figure 76
Fold Cylinder Shims
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