47
ADJUSTMENTS
KEEP THE AIR OUTLETS FREE OF OBSTACLES.
SUBMINISTRATE ENOUGH POWER TO THE PNEUMATIC SYSTEM UNTIL REACHING THE MINIMUM
SUCTION POWER VALUES SPECIFIED IN THE TABLE. CHECK THE DEPRESSURE VALUES AFTER
RUNNING THE FIRST 10 METRES.
VERY IMPORTANT: IN MODELS EQUIPPED WITH MECHANICAL FAN, THE FAN’S SUCTION POWER
DEPENDS ON THE ENGINE’S RPM OF THE TRACTOR. FOR THIS REASON, KEEPING A REGULAR TUR-
NING SPEED IS ESSENTIAL.
IN MODELS EQUIPPED WITH MECHANICAL FAN, THE TIMING BELT SHOULD BE TENSIONED. IT
SHOULD BE CHECKED WHEN STARTING THE SOWING SEASON, SINCE WEAR OR DAMAGE COULD
CAUSE A PRESSURE LOSS IN THE SUCTION CIRCUIT (SEE SECTION 9.3 FANS).
IF THE PRESSURE LEVEL IS LOWER THAN THE ONE RECOMMENDED BY THE MANUFACTURER,
THE SEED DISC’S HOLES COULD HAVE A LACK OF SEEDS. ON THE OTHER HAND, IF THE PRES-
SURE IS EXCESSIVE, DOUBLES COULD EMERGE OR THE DISTANCE BETWEEN SEEDS COULD BE
IRREGULAR.
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