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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 32).
1. Mower belt with 1/2 inch
(13mm) deflection
8. Engage the blade control (PTO) lever.
9. Check the clearance between the bell crank and the
transmission output shaft (Figure 33).
1. 1/16-1/8 inch (2-3 mm)
2. Bell crank
3. Transmission output shaft
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 33).
12. Disengage the blade control (PTO) lever.
Figure 32
2. Idler pulley
Figure 33
4. Hairpin cotter
5. Clevis pin
6. Clevis
Note: If the assist arm does not contact the front
stop on the mower deck (Figure 34), adjust the clevis
to bring the bell crank closer to the transmission
output shaft (Figure 33).
1. 1/2 inch (13 mm) deflection
here
2. Assist arm
3. Front stop
13. Check the belt guide under the engine frame for the
proper adjustment (Figure 31).
Note: The distance between the belt guide and the
mower belt should be 1-1/4 inch (32 mm) when
you engage the mower belt. Adjust the mower belt
as necessary. The disengaged belt should not drag
or fall off the pulley when the guides are properly
adjusted.
Adjusting the Mower Belt
Tension
Adjust the mower belt tension as follows:
• After the first 8 operating hours.
• After the first 25 operating hours.
• After every 50 operating hours.
Check the belt tension after the first 8 operating hours
and 25 operating hours thereafter. Check the belt
tension after every 50 operating hours.
Important: The belt must be tight enough to not
slip during heavy loads while cutting grass. Over
tensioning the belt will reduce the bearing life of
the belt and the spindle.
30
Figure 34
4. Locknut
5. Turnbuckle
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