4 MACHINE ADJUSTMENTS
4.1
Working depth
- Lift the LELYTERRA harrow so that the locking pins
(fig. 4) in the quadrants can be adjusted.
- Place the pins in the hole which matches the required
working depth. When the LELYTERRA harrow is lowered
into the soil, the upper part of the lever arm hits the pin
upon attaining the required working depth.
4.2
Soil deflectors
The soil deflector A (fig. 5) is adjustable both in the
horizontal and vertical direction.
- The deflector should be so fitted that it cuts into the soil up
to 5 cm as a maximum and that the space between the
deflector and the depth control roller is as small as
possible.
Throughout the operation and lifting of the machine the
soil deflectors should remain clear of the depth control
roller.
- Fit the guide plate B in such a position that an optimum soil
flow towards the roller is ensured.
Minimum distance between the lower side of the soil
deflector and the tines runs from 0,5 to 1,5 cm.
- Adjust this distance by fitting or removing washers above
the buffer (fig.5).
4.3
Rotor speed
Soil condition, required crumbling and forward speed are the
decisive factors for the machine’s rotor speed.
Rotor speed is determined by the change gear combination in
the gearboxes (fig. 6) as well as by the PTO speed.
Listed in the schedule below are the rotor speeds which can
be achieved with the various gear combinations.
Whenever possible, use the lowest rotor speed with the
machine still doing a good job. Higher rotor speeds cause
finer crumbling but also require more power whilst also
leading to increased wear and tear of tines.
31
4
5
B
A
6
CHANGE GEARS
top
19
20
21
22
23
below
16
15
14
13
12
LELYTERRA
®
400-35H/45H
rotor speed r.p.m.
PTO output: 1000 r.p.m.
290
320
360
410
460