Duncan Enviro 3000e, Owner'S Manual

Page: 16 / 130

Transport Position
When in the transport position the hydraulic cylinders are
fully extended. In this position the cylinders fully equalise by
allowing oil to bypass the master cylinder piston. To ensure
the cylinder rods are equally extended and to minimise
variations in sowing depth, raise the drill into the transport
position regularly to counteract the effects of oil leakage past
the piston. It is recommended to raise the drill into the
transport position when turning at headlands.
Coulter Penetration Depth
To create the ideal seed bed the front coulter disc should cut
approximately 20mm below the double discs. If more
undercut is required or the ground is particularly hard or the
discs have become worn, the front coulter beam can be
lowered. This is done by undoing the four bolts at each end
of the beam on the outside of the sideplates (Fig 7/1),
connecting the hydraulic hoses for the rams to the supply
and operating them until the beam is level and the discs are
at the required height. Retighten the bolts and disconnect
the hydraulic hoses.
The system is factory set at the highest level. When the
beam is moved down, there are three holes 20mm apart for
intermediate settings, in which an M20 bolt can be fixed as a
stop. Choose the hole to give the best position. An M20 bolt
for this purpose is stored at the top front of each of the side
plates.
Note: The front coulter blades will sharpen with initial use
and therefore penetration ability will improve.
Double Disc Sowing Depth
The penetration depth of the double discs is dependent on
two aspects.
1 The weight applied from the machine’s mass.
2 The press wheel adjustment.
If the ground is hard and the double discs are not
penetrating to the desired depth the press wheels will not be
in contact with the ground. To increase the weight applied,
refer to “Front Coulter & Dragbar Loading” (Page 13).
Where the loading applied to the double discs exceeds the
ground resistance the remaining load is transferred to the
press wheels. The running height of the press wheel in
relation to the double discs controls the sowing depth. See
“Press Wheel Adjustment” (below).
Note: Ground penetration ability will increase as the double
discs sharpen and the paint wears off.
Press Wheel Adjustment
Press wheels are used to control the seeding depth and
compact the soil after sowing to give good seed/soil contact.
To adjust the press wheel setting, reposition the jaw lock pin
in the desired notch.
14
Fig 7
1