72
Marchesan Implementos e Máquinas Agrícolas “TATU” S.A.
PST DUO FLEX / PST DUO FLEX SUPREMA
Adjustments and operations
Troubleshooting guide
TYPE
PROBLEM
CAUSES
POSSIBLE SOLUTIONS
Pneumatic
seed
metering
Seed skips
Seed singulator
Check the seed singulator. Always use the
adequate singulator and seed plate for each
culture.
Low seed level
Check the amount of seeds on the hopper and
on the metering. Adjust the seed deflector to the
compatible position for the used seed.
Strange object
inside the metering
Check the physical purity of the seeds that are
about to be sowed, as well as the presence of
strange objects inside the hoppers or system.
Normally, seeds with a lower physical purity are
more prone to clog and lock the system due to
strange objects.
Disc blade shims
Check the number of shims on the disc to level
the system; check if the shims are not worn out.
If so, replace them.
Vacuum system
Increase the vacuum system and check it on
every row unit.
Seed and fertilizer
chute outlet
Check the condition of all components and
replace them if necessary; check a possible
clogging caused by strange material or greater
flow of seeds on the chute and clean it; Adjust
the deflector according to the culture that are
about to be sowed to avoid seed cloggings.
Bad metering
alignment
Check the metering alignment related to the
equipment and to the components which are
responsible to drop the seeds.
Lack/excess of
graphite
Check the amount of graphite (solid lubricant)
inside the metering.
Obstruction of the
system breathers
Check and unobstruct the breathers of the
pneumatic system, allowing a free air flow on
the metering.
Equipment speed
The equipment speed is one of the main
factors that cause problems on the number of
plants. Always keep the ideal plantation speed.
Marchesan recommends a speed of 5 - 7 km/h.
