8/2/18
196-126M
2N-2410 & 2N-3010
Drill Preparation and Setup
18
Raise-To-Fold Hydraulics
The raise-to-fold cylinders are double acting but not
rephasing. There are four cylinders in the raise-to-fold
system. Two are on the tool bar, and two are on the
tongue. Follow these steps to properly bleed the raise-to-
fold hydraulics.
1.
Check that the tractor reservoir is filled to the proper
level. It will take 3.4 gallons to charge the raise-to-
fold cylinders.
2.
Select the raise-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
cylinders 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.
Do not attempt to bleed an O-ring fitting 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 you see oil
coming from around the fitting. Do not attempt to
extend 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 lever which
feeds oil to the rod end of the tool-bar cylinders. Stop
when you see oil coming from around the fittings. Do
not attempt to retract the tool-bar cylinders while
bleeding the rod 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.
Do not attempt to bleed an O-ring fitting or O-ring damage
may occur.
11. Slowly work the lever in the opposite direction to feed
oil to rod end of the tongue cylinders. Stop when you
see oil coming from around the fitting. Do not attempt
to retract the tongue cylinders while bleeding the rod
ends.
12. Loosen the hose-end fittings at the tee coming from
the base ends of the tool-bar cylinders. Slowly work
the lever to feed oil to the base end of the tool-bar
cylinders. Stop when you see oil coming from around
the fittings. Do not attempt to extend the tool-bar
cylinders while bleeding the base ends.
13. Extend and retract the cylinders several times to
expel most air from the system. The remaining air
will gradually be pushed to the tractor during day-to-
day operations.
14. Re-pin the tongue and tool-bar cylinders. Raise and
lower the wings several times to check for proper
operation. If movement is erratic, repeat bleeding
operation.
15. Recheck the tractor hydraulic reservoir level and add
clean fluid as necessary.
Fold Hydraulics
The fold cylinders are not rephasing. The two fold
cylinders connect the main frame and drill boxes. Follow
these steps to properly bleed the fold hydraulics.
Check that the transport-lock and raise-to-fold systems are
bled and completely operational before
working with the fold
hydraulics.
1.
Make sure the tractor hydraulic fluid reservoir is filled
to the proper level. It will take about two gallons to
charge the fold cylinders.
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 lever to
feed oil to the base end of the fold cylinders. Stop
when you see oil coming from around the fitting. Do
not attempt to extend the fold cylinders when
bleeding base ends.
6.
With cylinders completely extended, repeat the
procedure for the hose connection at the rod end.
7.
Retract and extend the cylinders several times to
expel 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 as necessary.
