14
Note: You need a No. T27 torx driver to complete this
procedure.
1. Stop the engine and wait for all moving parts to stop.
2. Remove the key from the switch.
3. Disconnect the wire from the spark plug. Refer to steps
3 through 5 of Replacing the Spark Plug on page 15.
Removing the Old Rotor Blades
Note: To make replacing the rotor blades easier, do not
remove all the old rotor blades at once; this disassembles
the rotor drum, making installing the new rotor blades more
difficult. Replace the rotor blades one at a time to keep the
rotor drum intact.
1. Remove the four torx screws and the four locknuts that
secure the outer edges of the rotor blade to the rotor
assembly (Fig. 14).
m-5057
1
3
5
6
7
4
2
4
3
Figure 14
1.
Rotor blade (3)
2.
Rotor assembly
3.
Rotor drum
4.
Locknut (18)
5.
Torx screw (12)
6.
Spacer (6)
7.
Hex-head cap screw (6)
2. Remove the two hex-head cap screws and two locknuts
that secure the center of the rotor blade to the rotor
drum (Fig. 14).
3. Slide the rotor blade out from between the rotor drum
parts (Fig. 14).
4. Remove the two spacers from the old rotor blade and
install them in the new rotor blade.
Installing the New Rotor Blades
1. Examine a new rotor blade edge for the difference in
the thickness of the rubber layers (Fig. 15).
m-5059
2
3
1
4
Figure 15
1.
Thick rubber side
2.
Wear indicator hole
3.
Thin rubber side
4.
Inside of curved surface
Install the rotor blades with the thick rubber layer on the
inside of the curved surface (Fig. 15). If you do not
install the rotor blades properly, they will wear out more
quickly.
2. Insert the new rotor blade between the rotor drum parts.
3. Secure the new rotor blade to the rotor drum parts with
the two hex-head cap screws and two locknuts that you
previously removed. Position the bolt heads on the thick
rubber side of the rotor blade (Figs. 14 and 15).
4. Curve the new rotor blade and secure it with the
remaining torx screws and locknuts, positioning the
screw heads on the thick rubber side of the rotor blade
(Figs. 14 and 15).
5. Tighten all screws and locknuts securely.
6. Replace the scraper. Refer to Replacing the Scraper on
page 14.
7. Connect the wire to the spark plug.
8. Install the control panel.
9. Insert the key in the switch.
Note: The traction is most aggressive (the traction speed is
fastest) when the rotor blades are new. If you want to
reduce the aggressiveness of the traction, refer to Adjusting
the Traction Drive Cable on page 13.
Replacing the Scraper
Note: If the rotor blades are partially or completely worn,
replace the rotor blades when you replace the scraper. This
ensures proper snowthrower operation and performance.
1. Stop the engine and wait for all moving parts to stop.
2. Remove the key from the switch.
3. Disconnect the wire from the spark plug. Refer to steps
3 through 5 of Replacing the Spark Plug on page 15.
4. Tip the snowthrower backward onto its handle.
