Duncan Enviro 3000e, Owner'S Manual

Page: 30 / 130

28
6 Seed/Fertiliser Boxes
These tubes can stretch over a period of time and
require checking at approximately 6 monthly intervals.
Check tubes at the operating depth. Shorten if
necessary to avoid bends which will restrict the flow of
seed/fertiliser.
The required seed rate is controlled by both the
metering wheels and the bottom flaps. The seed flows
from the seed box into the metering wheel housings.
Inside the metering wheel housing (Fig 21/1) the seed
is caught between the metering wheel (Fig 21/2) and
the bottom flap (Fig 21/3). The metered amount of seed
is transported by the metering wheel to the edge of the
bottom flap where it drops off into the seed guide tube
which leads to the coulter. Varying grain sizes require
the matching of the flap clearance to the different grain
sizes. This matching is done by raising or lowering the
bottom flaps by using the flap adjusting lever on the LH
end of the seed box. If larger foreign particles, e.g.
stones, get between the metering wheel and the bottom
flap, the bottom flap can give way downwards. A strong
return spring (Fig 21/4) brings the bottom flap
immediately back into the working position.
The metering system should be checked every
100 hectares or weekly or before any sowing period,
with an empty seed box and empty metering
housings. Use the following proceedure:
Put the bottom flap setting levers (located on the LH
end of the seed boxes) in position “1” for the front box
and position “1” for the rear box. Refer Fig 22.
By turning the metering wheel shaft by hand, check
the flaps are all set to a gap of 0.1 - 0.5mm
(refer Fig 21).
To adjust individual flaps use the spring tensioning
screw (Fig 21/5).
If agitator shaft(s) do not turn freely in the box,
disassemble them and clean or replace the plastic
bearings.
Note: Maintenance Schedule
(Page 25)
Where the frequency is given in terms of time of use
(e.g. weekly) or area covered (e.g.100 ha), perform the
maintenance task according to whichever occurs first.
Storage
Preparing the Machine for Storage.
Locate a dry level surface. The machine should be stored
wherever possible with the rams retracted.
For longer term storage remove seed/fertiliser tubes from
the coulters and allow to hang without deformation.
Fig 21
Fig 22
Import
ant !