Service Manual

Single Stage Snowthrower Service Manual 5 - 1
DRIVE SYSTEMS
DRIVE SYSTEM (BELT) SNOWMASTER -
S-200, S-620
The Toro belt drive system, which is utilized on all 20”
Snowmasters and S-200’s, consists of a crankshaft
pulley, a rotor pulley, a spring loaded idler and a
multigrooved V-belt (Figure 57.). The power from the
engine is transferred from the crankshaft pulley to a
rotor pulley by the multigrooved V-belt. A constant
tension is supplied to the V-belt from the spring loaded
idler.
Figure 57 0217-029
Replacing Drive Belt
The belt that drives the impeller may become worn
after many hours of use. This wear will cause the
impeller to slip. If the impeller slips, the V-belt should
be replaced.
To Replace The Belt
1. Turn the key to the “OFF” position.
2. Remove the washer faced cap screw. On the
1975 Snowmaster, the cap screw is located at the
top of the drive cover. Next, remove the four
screws and locknuts holding the drive cover in
place (Figure 58). Remove the cover.
3. Move the idler pulley up and away from the V-belt
and pull the belt out so it is free; then allow the
spring loaded idler to release (Figure 59).
Note: Do not allow the idler to snap when
released as damage to components may occur.
4. Remove the drive belt from the impeller pulley and
engine pulley.
Figure 58 0217-030
Figure 59 0217-031