Great Plains P18140C Operator Manual - Manual (Page 35)

35 8-10m Press Range
Operating Instructions
7. Parts and Assembly
5.5 Double Disc Axles
The axles on this roller are tensioned by the
main axle through the centre of the rings
and bearings.
Specialist equipment is required
for the disassembly of Double
Disc axles. Please consult your
dealer under any circumstances
that require disassembly of these
axles.
Maintenance of these rollers is limited to
daily greasing of the bearings to flush out
dirt, and regular inspection to ensure the
assemblies are tight, and scrapers are
correctly set. The axles can be tightened
provided the bearing pillar ‘U’ bolts are
loosened to avoid preloading the bearings
as they move sideways to each other.
Ensure the bearing pillars are re- tightened
to the mainframe after this.
5.6 Wing Pitch
The pitch of the wings can be altered
by using the threaded ends of the wing
cylinders. Tightening will raise the outer tips
of the wings and loosening will lower the tips
of the wings.
Fig. 5.04: Wing Pitch Adjustment
5.7 Hydraulics
A low oil flow should be used,
i.e., tractor tickover or low flow
selected.
The wing circuit is controlled by an
overcentre valve contained within
the manifold block which positively
locks oil flow until pressurised by
the tractor. System pressure can
be retained in the circuit even
after depressurisation of the
tractor quick release couplings.
Exercise extreme care when
checking the valve or circuits,
and under no circumstances
attempt to adjust or loosen fittings
without prior reference to your
authorised Simba Great Plains
dealer, and detailed maintenance
instructions.
5.8 Preparation for
Storage
If you need to store the machine for a longer
period, observe the following points:
• Park the machine undercover if possible.
• Protect the roll / discs against rust. If you
need to spray the implements with oil, use
light biologically degradable oils, e.g. rape
oil.