Great-plains 2N-3020 Predelivery Manual User Manual download pdf (Page 9)

Section 2 Setup

1/3/06

Models 2410, 3010, 2420 and 3020 Folding No-Till Drill 196-202M

Great Plains Mfg., Inc.

Bleed Lift-to-Fold Hydraulics

The lift-to-fold cylinders are double acting but not rephas-

ing. There are four cylinders in the lift-to-fold system. Two

are on the tool bar, and two are on the tongue. Follow

these steps to properly bleed the lift-to-fold hydraulics.

1. Check that the tractor reservoir is ﬁlled to the proper

level. You will need about 3.4 gallons to charge the lift-

to-fold circuit.

2. Select the lift-to-fold system on the control console.

3. Check that the drill is unfolded and resting safely on

the ground.

4. Disconnect the rod-end clevis of both tool-bar cylin-

ders and both tongue cylinders. Support the cylinders

so the rods may extend and retract freely.

5. Retract the tongue cylinders completely. This will also

fully extend the tool-bar cylinders.

6. Loosen the hose-end ﬁtting coming into the tee on the

base end of the left tongue cylinder

IMPORTANT: Do not attempt to bleed an O-Ring fit-

ting or O-Ring damage may occur.

7. Slowly work the remote lever to feed oil to the base

end of the tongue cylinders. Stop when oil is seen

coming from around the ﬁtting. Do not attempt to ex

tend the tongue cylinders while bleeding the base

ends.

8. Loosen the hose-end ﬁttings at the tee on rod ends of

the tool-bar cylinders. Slowly work remote lever which

feeds oil to the rod end of the tool-bar cylinders. Stop

when oil is seen coming from around the ﬁttings. Do

not attempt to retract the tool bar cylinders while

bleeding the rod ends. Retighten hose-end ﬁttings at

the tee on cylinder base ends.

9. Fully extend the tongue cylinders and retract the tool

bar cylinders.

10. Loosen the hose-end ﬁtting at the tee on the rod end

of the left tongue cylinder.

IMPORTANT: Do not attempt to bleed an O-Ring fit-

ting or O-Ring damage may occur.

11. Slowly work the remote lever in the opposite direction

to feed oil to rod end of the tongue cylinders. Stop

when oil is seen coming from around the ﬁtting. Do not

attempt to retract the tongue cylinders while bleeding

the rod ends. Retighten hose-end ﬁttings at the tee on

rod ends of tool-bar cylinders.

12. Loosen the hose-end ﬁttings at the tee coming from

the base ends of the tool-bar cylinders. Slowly work

the remote lever to feed oil to the base end of the tool

bar cylinders. Stop when oil is seen coming from

around the ﬁttings. Do not attempt to extend the tool

bar cylinders while bleeding the base ends. Retighten

hose-end ﬁttings at the tee on the base ends of tool-

bar cylinders.

13. Extend and retract the cylinders several times to expel

most air from the system. The remaining air will grad

ually be pushed to the tractor during day-to-day oper-

ations.

14. Repin the tongue and tool-bar cylinders. Raise and

lower the wings several times to check for proper op

eration. If movement is erratic, repeat bleeding opera-

tion.

15. Recheck the tractor reservoir level and add clean ﬂuid

as necessary.

Bleed Fold Hydraulics

The fold cylinders are not rephasing. The two fold cylin-

ders connect the main frame and drill boxes. Follow these

steps to properly bleed the fold hydraulics

IMPORTANT: Check that the transport-lock and lift-

to-fold systems are bled and completely operational

before working with the fold circuit.

1. Make sure the tractor reservoir is ﬁlled to the proper

level. You will need about 1.75 gallons to charge the

fold circuit.

2. With the boxes unfolded unpin the rod-end clevis and

support the fold cylinders so they can be extended

and retracted.

3. Select the fold system on the control console. Retract

the fold cylinders completely.

4. Loosen the connection between the hose-end and

base-end tee ﬁtting on the left fold cylinder.

5. With the tractor at idle slowly work the tractor remote

lever to feed oil to the base end of the fold cylinders.

Stop when oil is seen coming from around the ﬁtting.

Do not attempt to extend the fold cylinders when

bleeding base ends. Retighten hose-end ﬁtting on

base end tee on left fold cylinder.

6. With cylinders completely extended, repeat the proce-

dure for the hose connection at the rod end. Retighten

hose-end ﬁtting on the rod end.

7. Retract and extend the cylinders several times to ex-

pel most air from this system. The remaining air will

gradually be pushed to the tractor during day-to-day

operations.

8. Recheck the tractor reservoir level and add clean ﬂuid.

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Great-plains 2N-3020 Predelivery Manual User Manual Page 9

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