Figure 64
1.
Mower belt
5.
Gearbox pulley
2.
Mower spindle pulley
6.
Idler spring
3.
Spring loaded idler pulley
7.
Idler plate (for 72 inch
mowers only)
4.
Belt guide at a 45 degree
angle
9. Install the belt guide on the spring loaded idler at a
45 degree angle as shown in Figure 64 and Figure 66.
Torque the bolt to 27 to 33 ft-lb (37 to 45 N-m).
10. Install the idler spring to the two posts (Figure 64
and Figure 66).
11. Adjust the belt tension, refer to Adjusting the Mower
Belt Tension.
12. Install the belt covers by sliding the cover into the
tab, install the bolts, and close the latches (Figure 65).
Figure 65
1.
Belt cover
3.
Insert slot into the tab
2.
Latch
Adjusting the Mower Belt
Tension for 72in Mowers Only
Service Interval:
After the first 8 hours
Important:
To ensure proper mower belt tension,
which will result in a longer belt life, check the
mower belt tension after the first 8 hours of use and
8 hours after each belt change.
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 66). 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 66).
6. Insert a ratchet or breaker bar into the square hole in
the idler plate to adjust the tension (Figure 66).
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 66.
8. While holding the belt tension and spring length,
tighten the idler plate bolts that secure the idler plate
(Figure 66).
Figure 66
1.
Belt guide install at a 45
degree angle
4.
Ratchet or breaker bar
2.
Idler spring length
(between 10 and 10-1/4
inches (25.4 and 26.0 cm))
5.
Idler plate bolt
3.
Idler plate
47
