Duncan Enviro 740, Owner'S Manual

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13
Pt. No. 67304
Issue 1217
Operation
General Operation Guidelines
1 Use a sufficiently powerful tractor which is heavy enough to
tow the drill safely.
2 Operate the drill at a speed of 6-12 km/hr (4-8 mph).
In stoney and uneven ground conditions a lower speed is
more appropriate
3 Check that the drill is level during calibration and while seeding.
4 Adjust the individual depth wheels to the required sowing depth.
5 Check tyre pressure before seeding. Refer P 3.
6 Double check seed rates before seeding.
7 Raise the drill out of the ground when making any turns.
8 Raise the drill out of the ground before backing up.
9 After prolonged storage, check to see that all drive
mechanisms and hydraulic equipment are functioning correctly.
Check that the seed tubes are not perished or blocked.
Sowing Speed
Typical travel speeds when sowing range from 6-12 km/hr
in good conditions. In stoney and uneven ground conditions
a lower speed is recommended to minimise rapid part
deterioration. Sowing too fast can result in:
1 Poor contour following and uneven sowing depth.
2 Impact damage to:
a Ground engaging components.
b Bearings, housings & axles.
c Fasteners & structural components.
3 More extreme conditions will result in greater vibration &
uneven seed flow at low seeding rates.
Front Coulter & Dragbar Loading
The height of the drill when in the drilling position is
determined by the number and size of the depth collars
(1) and the threaded depth stop (2) on the LH wheel arm
cylinder shaft. This in turn determines the pressure on
the discs. Refer Fig 6.
In hard or tight conditions pressure may have to
be backed off (by adding spacers) to allow positive
ground wheel drive or in very soft conditions where
downward pressure may alter seed depth. This may be
a compromise between downward pressure, good wheel
drive contact and total contour following abilities.
Caution: The actual length of the depth collars used
must be maximised to ensure that the threaded depth
stop is not damaged due to over extension.
fig 6
1
2