2N-2410 & 2N-3010
Drill Preparation and Setup
17
8/2/18
196-126M
Bleeding Hydraulic Systems
A hydraulic system with air in the circuit will move in
jerky, uneven motions. If your hydraulics have not been
properly bled or you replace a hydraulic component,
bleed the hydraulics.
Field-Lift Hydraulics
The field-lift system is equipped with four rephasing-type
hydraulic cylinders that require a special procedure for
bleeding air. 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.
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.
This drill has a negative tongue weight when unfolded and
raised. Be certain that the drill is hitched securely to your
tractor drawbar and the hitch safety chain is securely attached
to the drill.
Never allow anyone under the drill when fittings are opened.
Escaping fluid may allow the drill to drop suddenly.
1.
Check that the tractor reservoir is filled to the proper
level. It will take 4 gallons to charge the field-lift
cylinders.
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 cylinders so the rod ends are higher than
the base ends. Check that there is enough room for
the cylinder rods to fully extend without contacting
anything.
To prevent trapped air pockets, the rod end must be higher
than any other part of the cylinder.
5.
With the tractor at idle, engage the lift-hydraulics
lever. When the cylinders for both gauge wheels
have completely extended, hold the lever on for one
minute.
6.
Retract the cylinder rods. Extend the rods again and
hold the lever on for one more minute. Repeat this
step two more times to completely bleed the system.
7.
Retract and reattach the hydraulic cylinders.
8.
Recheck the tractor hydraulic reservoir level and add
clean fluid as necessary.
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 axle pivot tubes. Follow these
steps to properly bleed the transport-lock hydraulics.
1.
Check that the tractor reservoir is filled to the proper
level. It will take about one gallon to charge the
transport-lock cylinders.
2.
Raise the drill to field position and support the main
frame.
3.
Select the locks system on the control console.
Retract 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 you
see oil coming from around the fitting. Do not attempt
to fully extend the lock cylinders when bleeding the
base ends.
5.
With the cylinders completely extended, repeat step
4 for the rod-end fitting.
6.
Recheck the tractor reservoir and add clean fluid as
necessary.
7.
Retract and extend the lock cylinders several times
to expel most air from the system. The remaining air
will be expelled gradually during day-to-day
operations.
8.
Recheck the tractor hydraulic reservoir and add
clean fluid as necessary.
