Adjusting The Mower Belt Tension - Toro 30069 Operator's Manual

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 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 44).
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 44).
Note: The eyebolt threads on both ends of the
turnbuckle should be engaged a minimum of
5/16 inch (8 mm).
1. Locknut
2. Turnbuckle
3. Front stop
5. Engage the blade control lever (PTO) and check the
belt tension.
Figure 44
4. Assist arm
5. 1/2 inch (13 mm) deflection
here
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 45).
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 45).
1. Rear idler pulley
2. Middle hole
3. Front hole
8. Check the belt guide under the engine frame for
proper adjustment (Figure 46).
Note: The distance between the belt guide and
the mower belt should be 3/4 inch (19 mm) when
you engage the mower belt (Figure 46). Adjust the
mower belt guide as necessary. The disengaged belt
should not drag or fall off the pulley when the guides
are properly adjusted.
G016078
1. Belt guide
9. Check the blade brake adjustment; refer to Adjusting
the Blade Brake.
36
Figure 45
4. Belt guide in back position
5. Front idler pulley (48 inch
mower deck only)
Figure 46