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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 32in and 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: Adjust the brake when you adjust the belt
tension or the brake linkage.
Important: The belt must be tight enough to not slip
during heavy loads while cutting grass. Over tensioning
the belt will reduce the life of the spindle bearing, the
belt, and the idler pulley.
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
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
Note: The eyebolt threads on both ends of the
turnbuckle should be engaged a minimum of 8 mm
(5/16 inch).
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 44-67 N-m
(10-15 ft-lb) with the belt deflected 13 mm (1/2 inch)
halfway between the pulleys
(Figure
45).
(Figure
45).
1. Mower belt with 13 mm
(1/2 inch) deflection
6. Tighten the locknut on the turnbuckle.
7. Check the blade-brake adjustment; refer to
the Blade Brake (page
Adjusting the Tension for 48-inch
Mower Decks
45).
Important: Adjust the brake when you adjust the belt
tension or the brake linkage.
Important: The belt must be tight enough to not slip
during heavy loads while cutting grass. Over-tensioning
the belt will reduce the life of the spindle bearing, the
belt, and the idler pulley.
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
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
Note: The proper mower belt tension is 44 to 67 N-m
(10 to 15 ft-lb) with the belt deflected 13 mm (1/2 inch)
halfway between the pulleys
35
Figure 45
32in and 36in Mower Deck
2. Idler pulley
41).
(Figure
47).
(Figure
Adjusting
(Figure
47).
46).
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