Replacing The Auger/Impeller Drive Belt - Toro 38066 Operator's Manual

Danger
Improperly adjusting the auger/impeller may
cause it to turn when disengaged. A rotating auger
or impeller can cut off or injure fingers, hands, or
feet.
Keep your face, hands, feet, and any other part
of your body or clothing away from concealed,
moving, or rotating parts.
Ensure that the impeller brake arm clearance is
maintained.
Do not adjust the auger/impeller drive belt too
tight because it may cause the auger/impeller to
turn when the control lever is in the Disengaged
position. If this occurs, decrease the belt tension.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug and ensure that
the wire does not contact the plug (Fig. 24).
3. Check the adjustment according to steps 5 through 7 of
Installing the Auger/Impeller Drive Control Linkage on
page 11. Make any needed adjustments.
4. Connect the wire to the spark plug.
5. Check the belt tension by operating the auger.
6. If the belt still slips, replace it. Refer to Replacing the
Auger/Impeller Drive Belt on page 25.
Important
Do not operate the snowthrower if the auger
and the impeller still rotate when you disengage the
auger/impeller drive control lever. Take the snowthrower to
an Authorized Service Dealer for service.
Replacing the Auger/Impeller
Drive Belt
If the auger/impeller drive belt becomes worn, oil-soaked,
or otherwise damaged, replace the belt.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug and ensure that
the wire does not contact the plug (Fig. 24).
3. Remove the three bolts that hold the belt cover in place
and set the cover aside (Fig. 30).
4. Loosen the auger brake arm assembly by loosening the
rear screw and removing the front screw that fasten the
auger brake arm assembly to the frame (Fig. 31).
5. Remove the idler pulley spring (Fig. 31). Let the brake
arm assembly to hang free but out of the way.
6. Remove the two bolts, two washers, and two lock
washers that secure the belt guide (Fig. 32).
7. Remove the engine crankshaft bolt, lock washer, and
washer (Fig. 32).
8. Separate and remove the engine pulley sheave (Fig. 32).
9. Remove the auger/impeller drive belt (Fig. 32).
10. Pull the idler pulley outward and install a new belt
around the large auger/impeller pulley (Fig. 32).
11. Loop the belt in front of the engine pulley, and ensure
that the belt is on the inside of the idler pulley (Fig. 32).
12. Install the engine pulley sheave, the washer, the lock
washer, and the engine crankshaft bolt.
Note: Ensure that the indexing rib in the engine pulley
sheave aligns with the indexing notch in the center
engine pulley. Do not pinch the belt (Fig. 33).
13. Ensure that the brake pad is properly installed on the
brake arm. Position the angled cutoff on the brake pad
as shown in Figure 34.
14. Install the two screws that secure the auger brake arm
assembly. Ensure that the tabs fit into the holes in the
right side of the snowthrower (Fig. 35).
15. Have someone squeeze the auger/impeller drive control
lever against the handgrip, and install the belt guide
using the two bolts, two washers, and two lock washers.
16. Check and adjust the belt guide. Ensure that the belt
guide is about 1/8 inch (0.3 centimeters) from the belt
or the engine pulley.
17. Check and adjust the auger/impeller drive control
linkage. Refer to steps 5 through 7 of Installing the
Auger/Impeller Drive Control Linkage on page 11.
18. Install the idler pulley spring.
19. Install the belt cover with the three bolts.
20. Connect the wire to the spark plug.
Important
Ensure that the auger and impeller do not
rotate while the auger/impeller drive control lever is in the
Disengaged position. Stand in the operating position and
look around to the side of the auger housing (Fig. 26). A
large screw head on the side of the auger housing rotates
when the auger and impeller rotate (Fig. 26). If the auger
and impeller rotate while the engine runs and the
auger/impeller drive control lever is disengaged, stop the
snowthrower immediately. Refer to Adjusting the
25