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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 47).
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 47).
Figure 47
1. Mower belt with 1/2 inch
(13mm) deflection
2. Idler pulley
Adjusting the Mower Belt
Tension
Adjusting the 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 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 48).
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 48).
Note: The eyebolt threads on both ends of the
turnbuckle should be engaged a minimum of
5/16 inch (8 mm).
39
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