Toro 4045 Operator's Manual page 105

Checking the Tension of the Belt
Service Interval: Every 1,000 hours
1. Park the machine on a level surface, stop the engine,
and remove the ignition key.
2. Open the front hood.
3. Align a straight edge over the drive belt and across the
pulleys as shown in
Figure 147
4. Press the belt down at the midway point between the
fan pulley and the alternator pulley as shown in
147.
Note: The range of belt deflection between the
straight edge and the belt should be 7 to 9 mm (9/32
to 11/32 in), under a load of 10 kg (22 lb).
5. If the tension of the belt is above or below the specified
range, adjust the drive belt tension; refer to
the Tension of the Belt (page
Figure 147.
Adjusting
105).
Adjusting the Tension of the Belt
1. Park the machine on a level surface, stop the engine,
and remove the ignition key.
2. Open the front hood.
3. Loosen the nut and bolt at the pivot point for the
alternator
1. Adjustment bolt
2. Nut (alternator pivot point)
4. Loosen the adjustment bolt on the alternator
148).
5. Move the alternator away from the engine to increase
the belt tension; move the alternator toward the engine
to decrease the belt tension
6. Tighten the alternator adjustment bolt
7. Check the tension of the belt; refer to
Figure
Tension of the Belt (page
8. If the belt tension is correct, tighten the nut and bolt
at the pivot point for the alternator
otherwise, repeat steps
105
(Figure 148).
Figure 148
3. Alternator
4. Bolt (alternator pivot point)
(Figure 148).
105).
4 through 7.
(Figure
(Figure 148).
Checking the
(Figure 148);