When fitting or removing the rollers, the stops
must be turned so that they are in line with the
slot in the housing.
Roller assembly for sowing small seed
Assembly instructions:
So that seed cannot force its way between the
metering wheels and the spacers, the metering
wheels and spacers are installed without play
using shims.
Bearings are built into the spacers.
Depending on the manufacturing tolerance, shim
washers are inserted to prevent the spacers from
rubbing on the metering discs.
Roller for sowing small seed
After all components have been assembled,
the space remaining up to the circlip is packed
with shims.
Then fit the circlip.
If the roller has been assembled correctly, the
metering wheels between the spacers can just
be turned freely. The parts must not rub against
each other but the play should be kept to a
minimum.
When held against the light, the gap should only
just be visible.
Functional test
After installation, the new roller must be tested
for proper operation and true running.
For this purpose, switch on the roller as de-
scribed under “Calibration Test”.
The drive motor must run uniformly “true”. No
sluggish points should be audible.
If the motor does not run true, metering
will be inaccurate and the motor can be
overloaded.
Locate sluggish points if possible.
Rework (grind, turn off in a lathe ...) or replace
damaged components.
Slacken off the screws on the side covers,
drive motor and roller bearing and adjust the
side covers to remove any tension.
If the drive shaft is bent, straighten or replace
it.
Foreign bodies are jammed between the
roller and the housing - remove the foreign
bodies.
If dust or dressing has penetrated between the
metering wheels and the spacers, dismantle
and clean the roller.
