Belts, Controls And Linkages; Introduction; Replacing The Auger/Impeller; Drive Belt - Toro Lawn-BoySeries Service Manual

INTRODUCTION

All models use two belts. One to drive the auger and a
second to drive the traction system. The auger drive
uses a combination idler and brake to engage the belt
for driving and to disengage the belt and apply the
brake for stopping.
The traction drive uses a constantly tensioned belt. The
clutching and shifting are done through the drive plate
and friction disc.

REPLACING THE AUGER/IMPELLER

DRIVE BELT

When the auger/impeller drive belt becomes worn,
stretched, oil-soaked, or otherwise damaged, replace
the belt.
1. Turn the engine off and disengage all controls.
2. Pull the wire off of the spark plug and ensure the
wire does not contact the spark plug.
3. Remove the two screws that hold the belt cover in
place and set the cover aside (Figure 35).
Figure 35
1. Upper belt cover
4. Remove the belt guide; do not bend (Figure 36).
Two Stage Snowthrower Drive Systems Manual
Chapter 2 — Belts, Controls and Linkages
M-2671
2. Screw (3)
Figure 36
1. Engine crankshaft
screw, lock washer
and washer
2. Engine pulley sheave
3. Auger/impeller drive
belt
4. Large auger/impeller
pulley
5. Slip the auger belt off the pulleys. Note: On some
models (typically the 824 and the 824XL) the
auger belt brake will not back off far enough to
remove the belt. Remove the front screws and
loosen the rear screw that fastens the brake arm
assembly to the chassis (Figure 37).
Figure 37
1. Rear screw
2. Front screw
6. Slip the new belt over the pulleys. Install any parts
that were removed.
M-3331
5. Idler pulley
6. Center engine pulley
7. Belt guide
8. Traction belt
9. Traction pulley
10. Traction idler pulley
11. Screw, washer, lock
washer
M-2678
3. Idler pulley spring
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