horsch Pronto 3 - 6 DC, Operating Instructions Manual

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Retightening the fan flange
The clamping taper fixates the fan wheel and
additionally clamps on the drive shaft.
The clamping taper on the fan drive may come
loose. The impeller can thus move along the
drive shaft and damage the fan.
NOTE
¾
After approx. 50 hours retighten the clamping
taper on the fan flange and check it annually.
Clamping taper
Please note:
¾
When tightening the screws, especially with
a new assembly, the fan wheel will move
towards the housing in the direction of the
protective grid.
¾
A loose flange must therefore be aligned
closer to the hydraulic motor, the gap between
impeller and intake side must remain as small
as possible.
¾
The clamping faces must be free of oil and
grease.
¾
The clamping screws must be tightened
uniformly and in several steps. Tightening
onto the taper should be supported by light
hammer blows on the flange (plastic hammer
or hammer shaft).
¾
The inch screws in design No. 10 - 24 4.6
must only be tightened with a torque of
max. 6.8 Nm.
¾
After tightening check the impeller for free and
even running.
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