Great Plains 2N-3020 Predelivery Manual - Manual (Page 8)

6
Section 2 Setup
Models 2410, 3010, 2420 and 3020 Folding No-Till Drill 196-202M 1/3/06
Great Plains Mfg., Inc.
Section 2
Setup
This section covers dealer requirements for drill setup.
This section includes instructions for bleeding air from the
hydraulics and adjusting the frame and boxes.
You should have already bled the lift-to-fold and fold hy-
draulics while assembling the drill. Bleed the field-lift and
transport-lock systems before leveling the frame and ad-
justing the boxes.
Bleed Field-Lift Hydraulics
The field-lift system is equipped with four rephasing hy-
draulic cylinders. These rephasing cylinders require a
special procedure for bleeding air from the system. Read
and follow the procedure carefully. Air in the system will
cause uneven seeding across the drill. Do not loosen hose
fittings in order to bleed air from this system.
!
WARNING!
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. Avoid the hazard by
relieving pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
leaks. Wear protective gloves and safety glasses or goggles
when working with hydraulic systems. If an accident occurs, see
a doctor immediately. Any fluid injected into the skin must be
surgically removed within a few hours or gangrene will result.
!
CAUTION!
This drill has negative tongue weight when unfolded and raised.
Be certain that the drill is hitched securely to your tractor draw-
bar and the hitch safety chain is securely attached to the drill
and tractor before raising or unfolding the drill.
!
WARNING!
Never allow anyone under the drill when fittings are opened.
Escaping fluid may allow the drill to suddenly drop.
1. Check that the tractor reservoir is filled to the proper
level. You will need about 4 gallons to charge the field-
lift circuit.
2. Put the tractor in park and set the parking brake. If
your tractor does not have these features, block
wheels to prevent tractor from rolling.
3. Raise and support the main frame and outside ends of
boxes just high enough to take the weight off all four
field-lift cylinders.
4. With the drill blocked and supported, unpin both ends
of all four field-lift cylinders. The field-lift cylinders are
located on the wing gauge wheels and the main-frame
transport wheels. Remove and safely position the cyl-
inders so the rod end is higher than the base end.
Check that there is enough room for the cylinder rods
to fully extend without contacting anything.
5.
IMPORTANT: To prevent trapped air pockets, the rod
end must be higher than any other part of the cylinder
during the bleeding operation.
With the tractor at idle hold the lift circuit remote lever
on. When the cylinders for both wing boxes have
completely extended, hold the remote lever on for
one minute.
6. Retract the cylinder rods. Extend the rods again and
hold the remote lever on for one more minute. Repeat
this step two more times to completely bleed the sys-
tem.
7. Retract and reattach the hydraulic cylinders.
8. Recheck the tractor reservoir level and add clean flu-
id as necessary.
Bleed Transport-Lock Hydraulics
The transport-lock cylinders are not rephasing. The two
transport-lock cylinders are on each side of the main
frame above the transport axel pivot tubes. Follow these
steps to properly bleed the fold hydraulics.
1. Check that the tractor reservoir is filled to the proper
level. You will need about 0.07 gallons to charge the
transport-lock circuit.
2. Raise the drill to field position and support the main
frame.
3. Select the locks system on the control console. Re-
tract the lock cylinders completely.
4. Loosen the connection between the hose and base-
end tee fitting on the left lock cylinder. With the tractor
at idle slowly work the remote lever to feed oil to the
base end of the lock cylinders. Stop when oil is seen
coming from around the fitting. Do not attempt to fully
extend the lock cylinders when bleeding the base
ends. Retighten the hose fitting on left, base-end tee
on left lock cylinder.
5. With the cylinders completely extended, repeat step
4 for the rod-end fitting.
6. Recheck the tractor reservoir level and add clean flu-
id as necessary.
7. Retract and extend the lock cylinders several times to
expel most air from the system. The remaining air will
gradually be expelled during day-to-day operations.
8. Recheck the tractor reservoir level and add clean flu-
id as necessary.