Replacing The Pump Drive Belt - Toro 74177 Operator's Manual

2. Remove the belt covers over the outside spindles.
3. Loosen the outer nut on the spring eye bolt (Fig. 59).
3
1 4 5
6
Figure 59
Top View
1. Outer nut
2. Idler pulley
3. Idler arm
4. Spring eye bolt
4. Remove the belt. Start at the outside pulley and rotate
the belt off (Fig. 60).
Note: Do not remove the spring.
Caution
Spring is under tension when installed and can
cause personal injury.
Do not remove spring from spring eye bolt.
5. Remove the spring loaded idler pulley (Fig. 59).
6. Route the new belt through the idler arm (Fig. 59).
7. Install the idler pulley and route the belt onto the other
pulleys (Fig. 60).
8. Tighten the outer nut on the spring eye bolt (Fig. 59).
Note: Check the spring length. The spring should measure
9-3/8 1/8 inch (238 3 mm) when installed. Adjust if it
does not (Fig. 59).
9. Install the belt covers over the outside spindles.
2
7
m–4197
5. Spring
6. 9-3/8 1/8 inch
(238 3 mm)
7. Deck belt
42
4
2
Figure 60
Top View
1. Deck belt
2. Idler arm
3. Outside 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 41.
2. Remove the bolt from the clutch strap and unplug the
clutch electrical wire (Fig. 61).
3. Pull the spring loaded idler to the side. Remove the
traction belt from the engine and hydro pump pulleys
(Fig. 61).
4. Install the new belt around the engine and hydro pump
pulleys (Fig. 61).
5. Pull the spring loaded idler to the side and align the
belt. Release pressure on the spring loaded idler
(Fig. 61).
6. Install the deck belt.
1
5
3
m–5531
4. Spring
5. Idler pulley