Croplands CROPAIR 300, Operator'S Manual, Page: 26 / 62

LP-OMCROPAIR-A
26
SECTION 5
PRE-OPERATION
ADJUSTING FAN BLADE ANGLES
FAN ADJUSTMENTS
The Fieni fans have 3-position, pitch (angle) adjustable
blades. For example, the 600mm fan offers the below pitch
angle settings.
Croplands Cropair units are assembled, tested, and
delivered in the medium blade angle setting.
Blade inclination angle Volume Power
26° Min 17,878 m
3
/h 9.8 HP
34° Medium 22,015 m
3
/h 13.3 HP
42° Max 26,200 m
3
/h 15.2 HP
A steeper blade angle will deliver a faster more
penetrating air stream (compared to a lower pitch angle)
at the same rpm, but it will require more power to do.
Any change of blade angle needs to consider tractor
capabilities.
FAN PITCH ANGLE
All Cropair Fieni fans have multiple pitch settings and are
normally supplied in the middle position.
To maximise performance, the blade pitch can be adjusted
to match the tractor’s capability / chosen operating
parameters such as PTO rpm.
To increase the blade angle will increase air (spray)
velocity and penetration, increase noise and increase
tractor power requirements.
The reverse is true for reducing pitch angles.
Adjusting the pitch angles can be done on the sprayer.
a) Disconnect the PTO drive.
b) Remove the safety fan guard.
c) Remove the hub cover.
d) Loosen the fan hub bolts.
e) It’s now possible to move the blades. All blades need to
be set to the same pitch angle.
f) Re-tighten the fan hub bolts. Makes sure the hub is
snugly fitting back together - if not, it’s a sign that one
or more of the fan blade splines are not correctly fitted.
g) Re-attach the hub cover, and safety guards.
The fan has been supplied “balanced. Swapping blades
and hub components around risks upsetting the balance.
Do not operate with damaged fan blades.
If replacing a damaged blade, it’s necessary to balance
the fan.
Replacing blades will require full disassembly.
Refer to Section 10, page 60, for Fieni Fan Assembly
Instructions.