Replacing The Pump Drive Belt - Toro Z-Master Z153 Operator's Manual

2. Remove belt covers over outside spindles.
3. Loosen outer nut on spring eye bolt (Fig. 55).
3
1 4 5
6
Figure 55
Top View
1. Outer nut
2. Idler pulley
3. Idler arm
4. Spring eye bolt
4. Remove belt. Start at outside pulley and rotate off
(Fig. 56).
Note: Dot not remove spring.
Caution
Spring is under tension when installed and can
cause personal injury.
Do not remove spring from spring eye bolt.
5. Remove spring loaded idler pulley (Fig. 55).
6. Route new belt through idler arm (Fig. 55).
7. Reinstall idler pulley and route belt onto other pulleys
(Fig. 56).
8. Retighten outer nut on spring eye bolt (Fig. 55).
Note: Check spring length. The spring should measure
9.375 .125 (238 mm .3 mm) when installed. Adjust if
it does not (Fig. 55).
9. Install belt covers over outside spindles.
2
7
m–4197
5. Spring
6. 9.375 .125
(238 mm .3 mm)
7. Deck belt
38
4
Figure 56
Top View
1. Deck belt
2. Idler arm
3. Outside pulley

Replacing the Pump Drive Belt

Check pump drive belt for wear after every 50 hours of
operation.
1. Remove deck belt first. See Replacing the Deck Belt
on page 37.
2. Remove bolt from clutch strap and unplug clutch
electrical wire (Fig. 57).
3. Pull spring loaded idler to side. Remove traction belt
from the engine and hydro pump pulleys (Fig. 57).
4. Install new belt around engine and hydro pump pulleys
(Fig. 57).
5. Pull spring loaded idler to side and align belt. Release
pressure on spring loaded idler (Fig. 57).
6. Reinstall deck belt.
1
5
3
2
m–4159
4. Spring
5. Idler pulley