43
Rape brushes
The rape brushes clean the cell discs in the roll-
ers for fine seeds.
Before sowing fine seeds the rape brushes must
be installed in the side cover and their function
must be checked.
Rape brushes assembled
¾
Check concentricity and fastening.
¾
Check condition and cleaning effect of
brushes.
¾
Install the side cover with the brushes into the
metering unit.
¾
The brushes must firmly rest against the cell
discs and should rotate with the roller
The function and cleaning effect of the
rape brushes must be checked before
starting sowing and at regular intervals
during work.
Sticking cell discs cause metering errors during
sowing Less seed is metered.
The side cover with the rape brushes can be
removed even when the seed hopper is full.
Sticking cell discs can then also be cleaned in
assembled condition.
The rape brushes should be disassembled when
sowing normal seeds. The housing holes must
be closed.
Function test
After installing a new roller the function and
concentricity of the new roller must be checked.
For this purpose switch on the roller as described
in the section "Calibration test".
¾
The drive motor must run "smoothly". No stiff
points should be recognizable.
Untrue running causes inaccurate
metering and may overload the motor.
¾
If possible locate the stiff point.
¾
Rework damaged parts (by machining ...) or
replace.
¾
Loosen the screws on the side covers for drive
motor and roller bearing and realign the side
covers to release tension.
¾
If the drive shaft has been bent, realign or
replace it.
¾
Remove any foreign bodies that may have
been jammed between roller and housing.
¾
If dust or dressing in the roller has entered
between cell discs and spacers dismantle
and clean the roller.
