Toro 74172 - Replacing the Deck Belt

Maintenance
37
Replacing the Deck Belt
Squealing when the belt is rotating, blades slipping
when cutting grass, frayed belt edges, burn marks and
cracks are signs of a worn deck belt. Replace the deck
belt if any of these conditions are evident.
1. Stop the engine, set the parking brake, remove
the key and disconnect the spark plug wire(s)
from the spark plug(s).
2. Remove belt covers over outside spindles.
3. Loosen outer nut on spring eye bolt (Fig. 27).
2
M-4197
14
3
7
5
6
Figure 27
T op V iew
1. Outer Nut
2. Idler Pulley
3. Idler Arm
4. Spring Eye Bolt
5. Spring
6.
9.375 ± .125 (238 mm
±.3 mm)
7. Deck
Belt
4. Remove belt. Start at outside pulley and rotate
off (Fig. 28).
Note: Dot not remove spring.
POTENTIAL HAZARD
• Spring is under tension when installed.
WHAT CAN HAPPEN
• Stored spring energy can cause personal
injury.
HOW TO AV
OID THE HAZARD
• Do not remove spring from spring eye bolt.
5. Remove spring loaded idler pulley (Fig. 27).
6. Route new belt through idler arm (Fig. 27).
7. Reinstall idler pulley and route belt onto other
pulleys (Fig. 28).
8. Retighten outer nut on spring eye bolt (Fig. 27).
Note: Check spring length. The spring should
measure 9.375” ± .125” (238 mm ±.3
mm) when installed. Adjust if it does
not (Fig. 27).
9. Install belt covers over outside spindles.
1
m–4159
2
3
4
5
Figure 28
T op V iew
1. Deck Belt
2. Idler Arm
3. Outside Pulley
4. Spring
5.
Idler Pulley