31FS 90, FS 90 R
English / USA
Mounting Metal Cutting Tools
Remove the skirt and blade from 
the mowing head deflector before 
mounting
grass cutting blade 230-4 (1),
grass cutting blade 230-8 (2),
or brush knife (3) – see “Mounting 
the Deflector”
Fit the appropriate limit stop before 
mounting the circular saw blade 200 
(4,5) – see “Mounting the Deflector”.
: Lay your machine on its back with 
the gearhead facing upward.
Cutting edges of (1) and (3) may 
point in either direction.
Cutting edges of (2), (4) and (5) 
must  point clockwise.
Direction of rotation is marked by 
arrow on inside of cutting head 
deflector or limit stop.
: Place the cutting tool (6) on the 
thrust plate (7).
Collar (see arrows) must locate in  
cutting tool’s mounting hole.
: Slip thrust washer (8) and rider 
plate (9) over the output shaft (10).
: Block the output shaft and
: Screw the mounting nut (11) with 
the combination wrench (12) onto 
the output shaft counterclockwise 
and tighten down firmly.
If the mounting nut is too loose, 
fit a new one.
Removing cutting tool
: Block the output shaft.
: Unscrew the nut clockwise.
: Removing the cutting tool – do not 
remove the thrust plate (7).