7.4
Spring tension of rotor guard
The rotor guard (A, fig. 20) prevents the rotors from
sustaining any damage, especially when the machine is
working in soils with a lot of stones and the like.
For effective operation of the rotor guard, the springs need to
be extended up to approx. 270 mm. Correct spring length is
approx. 290 mm if the ROTERRA power harrow is fitted with
a levelling board B.
7.5
Change of oil in gearbox
The oil of the gearbox of a new machine (or of a newly
assembled gearbox) should be changed after approx. 20
working hours. After this replenishment, oil should be
changed every 400 working hours. Oil has to be changed
more often if the machine is operated under demanding
circumstances.
- Tilt the ROTERRA power harrow slightly forwards.
- Place a receiving container in front of the gearbox.
- Unscrew the drain plug (fig. 21) from the gearbox and let
the oil flow into the receiving container.
- Fill the gearbox with ESSO SPARTAN EP 680 (5,2 l). For
replenishing/changing oil, use the specified oil only or
some other type which meets the specification
ISO 3448 VG 680/DIN 51517 CLP680.
The correct oil level is between the end of the dipstick and
the groove.
7.6
Replacement of tines/tineholders
There are different types of tineholders and tines, depending
on the direction of rotation. The tines need to have a trailing
position in the direction of rotation with the bulges at the
extremities facing backwards (fig. 22).
- When fitting a tineholder, apply Loctite 640 to the rotor
shaft.
- Tighten the nut of the tineholder with a torque of 250 Nm
(25 kgm). Secure the nut with a new split pin.
- Tighten the allen socket headed bolts of the tines with a
torque of 600 Nm (60 kgm).
Bolts to be checked for tightness after the machine has
worked a couple of hours.
40
20
270 mm
290 mm
B
A
21
22
250 Nm
(25 kgm)
600 Nm
(60 kgm)
!
