Toro 74178 - Replacing the Deck Belt

39
Danger
Mechanical or hydraulic jacks may fail to support
machine and cause a serious injury.
• Use jack stand when supporting machine.
• Do not use hydraulic jacks.
Inspecting the Belts
Inspect all belts every 100 hours.
Check belts for cracks, frayed edges, burn marks, or any
other damage. Replace damaged belts.
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 the belt covers over the outside spindles.
3. Loosen the outer nut on the spring eye bolt (Fig. 52).
2
14
3
7
5
6
m–4197
Figure 52
Top View
1. Outer nut
2. Idler pulley
3. Idler arm
4. Spring eye bolt
5. Spring
6. 9-3/8 ±.1/8 in.
(238±.3 mm)
7. Deck belt
4. Remove the belt. Start at the outside pulley and rotate
the belt off (Fig. 53).
Note: Do not remove the spring.
Spring is under tension when installed and can
cause personal injury.
Do not remove spring from spring eye bolt.
Caution
5. Remove the spring loaded idler pulley (Fig. 52).
6. Route the new belt through the idler arm (Fig. 52).
7. Install the idler pulley and route the belt onto the other
pulleys (Fig. 53).
8. Tighten the outer nut on the spring eye bolt (Fig. 52).
Note: Check the spring length. The spring should measure
9-3/8 ± 1/8 in. (238 ± 3 mm) when installed. Adjust it if it
does not (Fig. 52).
9. Install the belt covers over the outside spindles.
1
m–4159
2
3
4
5
Figure 53
1. Deck belt
2. Idler arm
3. Outside pulley
4. Spring
5. Idler pulley
Replacing the Pump Drive Belt
Check the pump drive belt for wear after every 50 hours of
operation.
1. Remove the deck belt first; refer to Replacing the Deck
Belt, page 39.
2. Remove the bolt from the clutch strap and unplug the
clutch electrical wire (Fig. 54).
3. Pull the spring loaded idler to the side. Remove the
traction belt from the engine and hydro pump pulleys
(Fig. 54).
4. Install the new belt around the engine and hydro pump
pulleys (Fig. 54).