Great Plains 3S-3000F Operator Manual v2 - Manual (Page 21)

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Section 1 Drill Preparation and Setup
11/9/07 3S-3000 Three-Section Folding Drill 195-110M-A
Great Plains Mfg., Inc.
Bleeding the Hydraulic Systems
!
CAUTION!
This drill has a negative tongue weight when unfolded and the
openers raised. Be certain that the drill is hitched securely to
your tractor drawbar and be certain the safety chain is securely
attached to the tractor before raising the openers and unfolding
the drill.
Bleeding the Fold Hydraulics
Refer to Figure 1-14:
1. With the drill unfolded (the fold cylinders completely
extended), disconnect the rod end pins and swing the
NOTE: Check hydraulic fluid level in tractor reservoir
and fill it to proper level before starting this proce-
dure. Add fluid to system as needed. A low reservoir
level may draw air back into the system causing jerky
or uneven cylinder movements. System capacity for
entire drill is approximately 4 1/2 gallons.
cylinders so they will not catch or contact anything
during the bleeding process.
2. Loosen the rod end hose fitting at the elbow on the left
fold cylinder.
3. Slowly supply oil to the rod end of the fold cylinders
until oil appears at the loosened hose fitting. Tighten
the rod end hose fitting and completely retract the fold
cylinders.
4. With the cylinders completely retracted, loosen the
base end hose fitting at the elbow on the left fold cyl-
inder.
5. Slowly supply oil to the base end of the fold cylinders
until oil appears at the loosened hose fitting. Tighten
the base end hose fitting and cycle the fold cylinders in
and out several times.
6. Repin the cylinder rod clevis.
Bleeding the Fold Hydraulics
Figure 1-14
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