Duncan Enviro 740, Руководство пользователя, Страница: 25 / 72

23
Pt. No. 67304
Issue 1217
fig 27
1
Caution - When resetting the metering wheels
on the seeder shaft
Care should be taken when tightening the grub screws
(Fig 25/3) on the fine seed wheel. Adjust the grubscrew until
the movement of the metering wheel just stops, then tighten
no more than 1/8 of a turn.
Do not overtighten as this can result in breakages while
operating and may render the warranty on these units void.
fig 28
fig 29
Small Seed
Calibration with Disconnected Agitator Shaft
The fine seed metering wheel used in Clough Drills is
especially well suited for sowing small seeds such as rape.
Due to the intensive action caused by the agitator the seeds
can adhere to each other, or be damaged, causing irregular
sowing/germination.
Therefore it is recommended that
when sowing small seeds, especially oil seeds and thin
shelled seeds, the drive to the agitator is disconnected.
To do this remove the lynch pin as shown in Fig 27/1.
Deviations between the calibrated and actual seed rate can
occur when residual dressing agent sticks to the bottom flaps
and thus slows the flow of seed. Before beginning the actual
calibration test fill the calibration trays by turning the crank
handle at a high speed around the 90 setting on the gearbox
scale. This will cause an immediate buildup of the dresssing
agent on the flaps. Return the contents of the calibration
trays to the seed box and proceed with the actual calibration.
Due to the residue buildup on the flaps your calibration will
now reflect accurately the required seed rate.
It is advisable with small seeds to use the 1/10 hectare
method for your calibration, thus cutting down on weighing
errors.
Note - Remember to reconnect the agitator shaft as required
for other seeds otherwise the consistency of seed rate will be
affected.
Sowing Peas
Peas having the size and shape as illustrated in Fig 28 (e.g.
White Field Peas), can be sown without problems with all
Clough Drills with this type of metering wheel.
The flap should be set to a gap of at least “3” on the flap
setting lever. Refer Page 17, Fig 14.
With these peas it should not be necessary to run the agitator
shaft.
Peas having the size and shape as illustrated in Fig 29 (e.g.
Green or Garden Peas), tend to bridge inside the seedbox
and do not flow freely.
This multi-faceted pea requires agitation for sowing.