horsch Focus 4 TD, Руководство по эксплуатации, Страница: 80 / 108

10 | Metering unit
80 60059040 • 02 • 07/2021 • en
10.1.5.1 Removing or installing a fine seeds rotor
The anti-rotation locks must be turned towards the recess in the housing when in-
stalling and removing the rotors.
Assembly of rotor for fine seeds
Maintenance The function and operability of fine seed rotors must be checked every day.
Ø
There should be no gap between the cell discs. If the gap is too big, additional
shims must be added.
Ø
The cell discs must be light turning. Dressing or similar materials must not
block cell discs or bearings.
Ø The safety clips must be in place and correctly assembled to avoid the forma-
tion of a gap.
Assembly note
To prevent seed from entering between cell discs and spacers, the cell discs and
spacers are installed with zero clearance shims.
Rotor for fine seeds
The spacers are equipped with bearings.
Depending on the manufacturing tolerance shims are added to avoid any friction
between cell discs and spacers.
After the assembly of all parts the remaining gap to the lock washer is filled up with
shims.
Finally push the lock washer into place.
With the rotor correctly assembled the cell discs between the spacers can just be
freely turned. The parts must not rub against each other. The clearance should
therefore be as little as possible.
When checking against a light source the gap should just be visible.