¾ Is the hydraulic fan connected to a pressure-
free return ow?
¾ Are fan wheel and intake grille clean?
¾ Is the fan wheel tightly mounted on the shaft?
¾ Are fan speed and drive pressure not ex-
ceeded?
¾ Is the metering unit equipped with the correct
cell wheel and is the sealing lip still in good
working order?
¾ In case of small seed, has the cleaning brush
been installed and is it in order?
¾ Is, especially in the case of small seed, the
correct seed quantity being placed?
¾ In the case of large seed, has the scraper
been installed?
¾ Are all connections, clearing valve and hopper
tightly closed?
¾ Is seed coming out of all coulters?
¾ Is seed bridging forming in the hopper (par-
ticularly with husky seed)?
Floating position Locked position Supply
Working hydraulics
Fan
The quality of drilling work essentially depends
on settings and checks.
¾ Before starting sowing you should therefore
carry out all maintenance and service work.
¾ Drilling must be checked when starting work
and, in case of larger elds, also regularly in
between!
¾ Has the machine been hitched up correctly
and are the coupling devices locked?
¾ Have the tractor link arms being locked
against swinging sideways?
¾ Have the hydraulic lines been correctly con-
nected?
¾ Has the machine been levelled in working
position and the drilling depth correctly ad-
justed?
¾ Are coulters, other cultivation tools and op-
tional equipment still in a serviceable state?
¾ Do the coulters have sucient pretension and
do they all rotate freely?
¾ Are the drill shoes still in good condition and
correctly adjusted?
41
Position of control units during use in the field
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