Belt Maintenance
Checking the Belts
Check all belts after every 50 operating hours or
monthly, whichever occurs first.
Look for dirt, wear, cracks and signs of overheating.
Replacing the Mower Belt
1. Disengage the blade control (PTO) lever and set the
parking brakes.
2. Stop the engine and wait for all moving parts to stop
before leaving the operating position.
3. Remove the knobs and the belt cover on the mower.
4. Remove the idler pulley and the worn belt (Figure 48).
5. Install the new mower belt.
6. Install the idler pulley.
7. Engage the blade control (PTO) lever and check
the belt tension. Refer to Adjusting the Mower Belt
Tension.
Note:
The proper mower belt tension is 10-15 lbf.
(44-67 N) with the belt deflected 1/2 inch (13 mm)
halfway between the pulleys (Figure 48).
Figure 48
1.
Mower belt with 1/2 inch
(13mm) deflection
2.
Idler pulley
8. Engage the blade control (PTO) lever.
9. Check the clearance between the bell crank and the
transmission output shaft (Figure 49).
Figure 49
1.
1/16-1/8 inch (2-3 mm)
4.
Hairpin cotter
2.
Bell crank
5.
Clevis pin
3.
Transmission output shaft
6.
Clevis
Note:
The clearance should be 1/16—1/8 inch
(2-3 mm).
10. Remove the hairpin cotter and the clevis pin from
the bell crank.
11. Rotate the clevis clockwise on the rod to increase
the clearance; rotate it counterclockwise to decrease
it (Figure 49).
12. Disengage the blade control (PTO) lever.
Note:
If the assist arm does not contact the front
stop on the mower deck (Figure 50), adjust the clevis
to bring the bell crank closer to the transmission
output shaft (Figure 49).
40
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