27 | P a g e
Always ensure a safe working environment as described within this manual when
folding/unfolding wings. Perform movements slow and safely paying special
attention to weight distribution, equality of descent, machine balance & stability,
environmental influences and neighbouring features/obstacles.
Manual Change-Over Valves (MCOV)
Sumo use MCOV’s to isolate different hydraulic
systems from one another. Depending on the
system required, simply pivot the lever to the
desire direction. Always operate hydraulic
systems slowly to ensure the correct system
has been selected.
Accumulators
Sumo hydraulic systems use high pressure accumulators, which can present a
danger if tampered with or misused. This includes drilling, welding or any other
process that could compromise the safety of the accumulator. It is expressly
forbidden for an operator, or any third party to dismantle or adjust the
accumulator in any way. Doing so will invalidate any existing warranty. If the
accumulator fails it should be changed under the supervision/instruction of Sumo
UK.
5.1.4 Pressurised System
Sumo Drills operate using a pressurised metering system to ensure controlled
and consistent seeding. It is therefore vital air leaks are kept to an absolute
minimum to ensure that metering remains accurate. Failure to isolate leaks may
cause substantial metering errors. During operation it is imperative hopper lids
should remain closed and sealed. It is good practice before drilling commences
to manually check that there is no air leaking from the lid seals. See ‘Hopper Lids’
section regarding the adjustments to hinge and catch to improve seal quality as
the machine ages. It is important to check all seals on the pressurised system
on a daily basis i.e. hopper lids, nylon sleeve, Orga inserts and replace where
necessary to ensure that the metering is accurate throughout the life of the
machine.
5.1.5 Hopper Lid
Hopper lids are adjustable to ensure you can create an airtight seal throughout
the life of the machine. Seals should be checked to ensure that they are creating
an airtight seal and should be replaced when they cease to function. When
drilling it is vital that the hopper lids are closed and secured, this will prevent air
leaks from the hopper that can lead to metering problems. The drill operates
using a pressured system to ensure a positive, consistent seeding rate.
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