Adjusting The Traction Drive; Replacing The Traction Drive Belt - Toro 38078 Operator's Manual

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Figure 21
1. Pipe plug
5. Check the level of grease in the gear box. The grease
must be visible through the opening.
6. If the level of grease is low, add Lubriplate MAG-1
grease (a low temperature, high pressure grease) to the
gear box until the point of overflow.
7. Install the pipe plug in the gear box.

Adjusting the Traction Drive

If the speed selector shifts properly but the snowthrower
does not drive in the reverse or forward speeds, adjust the
traction drive.
1. Pull the wire off of the spark plug and ensure that the
wire does not contact the plug (Fig. 19).
2. Check adjustment per steps 3 and 5 of Installing the
Traction Rod, page 8.
3. Make adjustments if required.
4. If the linkage is adjusted correctly and the problem
persists, contact your local Authorized Service Dealer.
Replacing the Traction Drive
Belt
When the traction drive belt becomes worn, oil–soaked, or
otherwise damaged, replace the belt. You can obtain a
new belt from your Authorized Service Dealer.
1. Pull the wire off of the spark plug and ensure that the
wire does not contact the plug (Fig. 19).
2. Remove the three screws holding the belt cover in
place and set the cover aside (Fig. 22).
3. Loosen the auger brake arm assembly by loosening the
rear screw and removing the front screw (Fig. 23).
4. Remove the idler pulley spring (Fig. 23), allowing the
brake arm assembly hang free, but out of the way.
5. Remove the two screws, washers, and lock washers
that secure the belt guide (Fig. 24).
6. Remove the engine crankshaft screw, lock washer, and
washer (Fig. 24).
7. Separate and remove the engine pulley sheave
(Fig. 24).
8. Remove the auger/impeller drive belt from the engine
pulley, leaving the belt looped around the large
auger/impeller pulley.
9. Remove the center engine pulley (Fig. 24).
10. Remove the traction belt from the traction pulley and
engine crankshaft (Fig. 24).
11. Pull the traction idler pulley outward and install the
new traction belt (Fig. 24).
12. Install the center engine pulley. Make sure not to pinch
the traction drive belt.
13. Pull the idler pulley outward and loop the
auger/impeller drive belt in the front of the engine
pulley, ensuring that the belt is on the inside of the
idler pulley and belt guide (Fig. 24).
14. Install the engine pulley sheave, washer, lock washer,
and crankshaft screw.
IMPORTANT: Ensure that the indexing rib in the
engine pulley sheave is aligned with the indexing
notch in the center engine pulley (Fig. 25).
15. Ensure that the brake pad is properly installed on the
brake arm. The angled cut-off on the brake pad must
be positioned as shown in Figure 26.
16. Install the two screws that secure the auger brake arm
assembly, ensuring that the tabs fit into the holes in
left side of the snowthrower (Fig. 27).
17. While someone squeezes the auger/impeller control
lever against the handgrip, install the belt guide using
the two screws, washers, and lock washers.
18. Check and adjust the belt guide, ensuring that it does
not contact any part of the engine pulley and is 1/8 in.
(3 mm) from the belt.
19. Check and adjust the auger drive linkage. Refer to
steps 5–7 of Installing the Auger/Impeller Drive
Control Linkage, page 9.
20. Install the idler pulley spring.
21. Install the belt cover with the three screws.
22. If the auger and impeller are rotating when the
engine is running and the auger/impeller control
lever is not engaged, immediately stop the engine
and bring the snowthrower to an Authorized Service
Dealer for repair.
IMPORTANT:
Do not operate the snowthrower if the
auger and impeller rotate when the auger/impeller
control lever is not engaged.
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