Toro 74254 Quick Manual page 2

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1
1. Belt cover
2. Latch
Adjusting the Mower Belt
Tension for 72 inch Mower
Decks
Service Interval: After the first 8 hours
1. Disengage the PTO, move the motion control levers
to the neutral locked position, and set the parking
brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Adjust the mower deck to the 3 inch (76mm)
height-of-cut position.
4. Measure the spring length (Figure 4). If the spring
length is between 10 and 10-1/4 inches (25.4 and
26.0 cm), from post to post, no adjustment is needed.
5. Loosen the bolts holding the idler plate (Figure 4).
6. Insert a ratchet or breaker bar into the square hole in
the idler plate to adjust the tension (Figure 4).
7. Rotate the ratchet or breaker bar to move the idler
plate until the idler spring is between 10 and 10-1/4
inches (25.4 and 26.0 cm) from post to post as
shown in Figure 4.
8. While holding the belt tension and spring length,
tighten the idler plate bolts that secure the idler plate
(Figure 4).
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3
G001311
Figure 3
3. Insert slot into the tab
1. Belt guide install at a 45
degree angle
2. Idler spring length
(between 10 and 10-1/4
inches (25.4 and 26.0 cm))
3. Idler plate
2
Figure 4
4. Ratchet or breaker bar
5. Idler plate bolt