Stihl BF Instruction Manual page 12

English
Mounting the Gearbox
A
Apply a mark (with pencil or felt-tip
N
pen) at distance A (50 mm/2 in)
from the end of the drive tube.
Loosen the clamp screws (4) on the
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gearbox – do not remove them.
Push the gearbox (5) onto the drive
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tube (2) – turn the gearbox back and
forth as necessary until the housing
reaches or covers the mark.
10
Line up the gearbox on the drive
N
tube so that the machine support on
the engine points down and the
rotor blades are vertical – parallel
with the deflector.
Tighten down the clamp screws (4)
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on the gearbox firmly.
WARNING
It must not be possible to rotate the
gearbox on the drive tube.
Adjusting the loop handle
Loosen the screws on the loop
N
handle.
Go to "Mounting the Loop Handle".
N
Mounting the Rotor Blades
Take care not to lose the two washers
on the gearbox output shaft.
Arrange the blades in the order they
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will be fitted on the shaft, noting the
following points:
Left-hand and right-hand blades are
different. The direction of rotation is
marked with arrows on the gearbox and
blades.
Rotate the inner right-hand
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blade (6) on the shaft until it can be
pushed into position – check the
direction of rotation again (arrows).
The hub of the inner blade is larger than
that of the outer blade.
Rotate the outer right-hand
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blade (7) on the shaft until it can be
pushed into position – check the
direction of rotation again (arrows).
Insert and engage the hitch pin (8)
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in the hole in the shaft – fold the
hitch pin flat against the blade.
Use the same procedure to mount
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the rotor blades on the left-hand
side.
BF