Stihl FS 251 R Notice D'emploi page 21

8 Assembling the Trimmer / Brushcutter
NOTICE
■ Using the trimmer with overly long trimmer line
increases the load on the motor and reduces
its operating speed. This may result in over‐
heating and damage to important components.
NOTICE
■ After mounting or removing the cutting attach‐
ment, always remove the stop pin used to
block the drive shaft.
8.5.2 Removing a Mowing Head
To remove a mowing head:
► Shut off the engine,
► Block the rotation of the drive shaft with the
stop pin.
► Position the unit so that you are facing the
underside of the deflector and the drive shaft
is facing upwards.
► Unscrew the mowing head by turning it clock‐
wise.
► Remove the thrust plate.
► Remove the stop pin from the hole in the gear‐
box.
8.6 Mounting and Removing a
Metal Cutting Attachment
8.6.1 Mounting a Metal Cutting Attachment
WARNING
■ Metal cutting attachments have many sharp
cutting edges. If they contact your flesh, they
will cut you, even if the metal cutting attach‐
ment is not moving. Always wear heavy-duty
work gloves when mounting or otherwise han‐
dling a metal cutting attachment,
WARNING
■ A metal cutting attachment that is damaged or
loose may vibrate, crack, break or come off
the unit, which may result in serious or fatal
injury or property damage. Make sure the
metal cutting attachment is properly tightened
and in good condition before starting work,
5.7.5.
To mount a metal cutting attachment:
► Shut off the engine,
0458-853-8201-A
12.1.
5.4.
12.1.
► Position the unit so that you are facing the
underside of the deflector and the drive shaft
is pointed upwards.
► Slip the thrust plate (5) onto the drive shaft (6).
Keep the side of the thrust plate with the
smaller diameter facing upwards.
► Place the cutting attachment (4) directly on top
of the thrust plate. Ensure that the cutting
attachment is positioned to rotate in the direc‐
tion indicated on the deflector.
► Slip the thrust washer (3) onto the drive shaft.
Keep the arched side facing up and the flat
side facing towards the metal cutting attach‐
ment.
► Slip the rider plate (2) onto the drive shaft.
► Insert the stop pin (7) in the hole in the gear‐
box and rotate the cutting attachment until the
stop pin slips into position and blocks the rota‐
tion of the drive shaft.
► Screw on the nut (1) counterclockwise and
tighten it down until the cutting attachment is
properly and securely tightened.
► Remove the stop pin from the hole in the gear‐
box.
Cutting attachments with more than 4 cutting
edges must be mounted with the cutting edges
pointing in the direction of rotation. Otherwise,
the cutting attachment will not cut. The direction
of rotation is indicated by an arrow on the under‐
side of the deflector.
English
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