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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 or Figure 51), adjust the
clevis to bring the bell crank closer to the transmission
output shaft (Figure 49).
Figure 50
36in Mower Deck
1. 1/2 inch (13 mm) deflection
here
2. Assist arm
3. Front stop
Figure 51
48in Mower Deck
4. Locknut
5. Turnbuckle
13. Check the belt guide under the engine frame for the
proper adjustment.
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
Adjusting the Tension for 36in Mower
Decks
Service Interval: After the first 8 hours—Check the mower
belt tension.
After the first 25 hours—Check the mower belt
tension.
Every 50 hours—Check the mower belt tension.
Important: The brake needs to be adjusted when the
belt tension or the brake linkage is adjusted.
Important: The belt must be tight enough to not slip
during heavy loads while cutting grass. Over tensioning
the belt will reduce the spindle bearing life, the belt life
and the idler pulley life.
The belt must be tight enough so it does not slip during heavy
loads while cutting grass and over-tensioning will reduce belt
and spindle bearing life.
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. Loosen the locknut on the turnbuckle (Figure 52).
4. Rotate the turnbuckle toward the rear of the mower to
increase the tension on the belt. Rotate the turnbuckle
toward the front of the mower to decrease the tension
on the belt (Figure 52).
Note: The eyebolt threads on both ends of the
turnbuckle should be engaged a minimum of 5/16 inch
(8 mm).
5. Engage the bladed control lever (PTO) and check the
belt tension. Adjust tension until it is correct.
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 52).
37
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