Great Plains P13114 2009 Operator Manual - Manual (Page 29)

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Operating Instructions
5.4 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 dealer, and detailed
maintenance instructions.
5. Servicing and
Maintenance
Follow the safety instructions for
servicing and maintenance.
Maintenance work should only be
undertaken with the machine
unfolded and lowered or on stands
with the hydraulic taps shut.
When working under the machine
ensure that the tractor handbrake
is on.
5.1 Servicing
Your machine has been designed and
constructed for maximum performance,
operational efficiency and operator
friendliness under a wide variety of operating
conditions.
Prior to delivery, your machine has been
checked at the factory and by your authorised
dealer to ensure that you receive a machine
in optimum condition.
To ensure trouble-free operation, it
is important that servicing and
maintenance work is performed at
the recommended intervals.
5.2 Cleaning
In order to ensure that the machine is always
in operating condition and to achieve
optimum performance, perform the cleaning
and servicing work at regular intervals.
Avoid cleaning the roll / disc bearings with a
high- pressure hose or a direct water jet. The
housing, screwed connections and ball
bearings are not watertight.
5. Servicing and Maintenance
5.3 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.