Great Plains Uni-Press - Manual (Page 17)

7. MAINTENANCE
WARNING: WHEN WORKING ON MACHINE ALWAYS ENSURE IT IS
FULLY SUPPORTED SHOULD BALANCE OF WEIGHT BE ALTERED, IF
A ROLL GANG IS REMOVED FOR EXAMPLE.
THE WING CIRCUIT IS CONTROLLED BY AN OVERCENTRE VALVE WHICH
POSITIVELY LOCKS OIL FLOW UNTIL PRESSURISED BY THE TRACTOR.
SYSTEM PRESSURE CAN BE RETAINED IN THE CIRCUIT EVEN AFTER DE-
PRESSURISATION 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.
PLEASE REFER TO YOUR SIMBA DEALER IN THE EVENT THAT A CIRCUIT
CONTAINING AN OVERCENTRE VALVE REQUIRES MAINTENANCE.
All nuts and bolts should be kept dirt free, threads well greased and as tight as recommended.
However bolts at pivot points should not be over tightened.
NEW MACHINES
On a new machine tighten all nuts and bolts after 5 hours work and again after 15
hours. This also applies to parts that have been moved or replaced. After the initial 15 hours
of work a once a week check is sufficient.
NOTE: When tightening the main axle castle nuts, loosen the bearing pillars to avoid
preloading the bearings housings and pillars (see Weekly Service Section 3).
DAILY SERVICE
1.Grease roll axle bearings until grease shows
2.Grease all grease points until grease shows.
3.Check roll rings for damage. Broken rings may lead to damage or failure of other
components.
4.Check hydraulic connections for leaks. Leaking hydraulics may allow the machine to lower
in work or road transport.
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