5 folding and unfolding – Great Plains P12720 User Manual
Page 17
17
X-Press
Operating Instructions
2.5 Folding and Unfolding
2.5.1 Unfolding into the Work
Position
1.
Ensure that the taps on the rear axle
cylinder (Fig. 2.01, taps A and B) are in
the open position (ie. in line with flow).
2.
Remove the transport strap from the
rear wing cylinders. Do not climb on the
machine to remove the transport strap.
3.
Lift the machine clear of the ground
ready for unfolding.
4.
Operate the hydraulics to fully unfold the
wings.
When wings are fully lowered they
will appear to be lower at the
wingtips. This is to enable the
machine to ‘float’ over uneven
ground in work and is normal.
5.
Ensure that the parking stands are in the
fully raised position.
6.
Lower the machine to the ground until
the drawbar cylinders touch the depth
stops.
7.
Retract the rear axle cylinders
completely.
8.
Close the taps on the rear axle to lock
the wheels clear of the ground during
work.
9.
Check the wing pressure on the gauge
(shown in Fig. 2.02). If this is above or
below the desired value then pressurise
the wings to fold which will zero the
setting. Increase the pressure on the
cylinder side by adjusting the valve
(Fig.2.02, valve 3) clockwise. By
rotating anticlockwise the pressure will
be reduced (see page 34 for more
details). Pressurise to unfold until the
required pressure is achieved.
10. Draw the X-Press into work then set the
desired pitch of the machine by adding
or removing shims from the drawbar
cylinder or disc frame cylinders. The
chassis should ideally be set to run
slightly nose high. The drawbar
hydraulics may be worked in float is
desired.
2.5.2 Folding into the
Transport Position
1.
Open the axle taps (Fig. 2.01, taps A
and B).
2.
Operate the hydraulics to fully raise the
machine.
3.
Fold the machine fully.
4.
Close the taps on the rear axle. Fit the
transport strap across the pins on the
rear wing cylinders for transport safety.
5.
The machine is ready for transport. If
the X-Press is to be unhitched from the
tractor in the folded position the parking
stands should be lowered.
2. Transportation / Installation
Fig. 2.03 Folded Machine