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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 38).
1. Mower belt with 1/2 inch
(13 mm) deflection
Adjusting the Mower Belt
Tension
Adjusting the Tension
Service Interval: After the first 8 hours
After the first 25 hours
Every 50 hours
Important: The blade 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.
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.
Figure 38
2. Idler pulley
3. Loosen the locknut on the turnbuckle (Figure 39).
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 39).
Note: The eyebolt threads on both ends of the
turnbuckle should be engaged a minimum of
5/16 inch (8 mm).
1. 1/2 inch (13 mm) deflection
here
2. Assist arm
3. Front stop
5. Engage the bladed control lever (PTO) and check
the belt tension.
6. If there is no adjustment left in the turnbuckle and
the belt is still loose, the rear idler pulley needs to be
positioned to the middle or front hole (Figure 40).
Use the hole that will give the correct adjustment.
7. When the idler pulley is moved the belt guide must
be moved. Move the belt guide to the front position
(Figure 40).
34
Figure 39
4. Locknut
5. Turnbuckle
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