Replacing The Traction Belt; Replacing The Mower Belts - Toro ProLine 30197 Operator's Manual

Maintenance

Replacing the Traction Belt

1. Stop the engine, set the parking brake and
remove the spark plug wire(s).
2. Raise the rear of the machine and hold with jack
stands.
3. Remove mower belt (Fig. 46).
4. Loosen pivot bolt enough to slide idler pulley in
slot and remove traction belt from the engine and
drive pulleys.
5. Install new belt around engine and drive pulleys
(Fig. 45).
6. Slide idler pulley in engine frame to tension
traction belt (Fig. 45).
7. Install the mower belt (Fig. 46).
8. Check the belt guides under the engine frame for
proper adjustment (Fig. 45). Adjust as
necessary. The disengaged belt should not drag
or fall off pulley when guides are properly
adjusted.
Figure 45
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Replacing the Mower Belts

Service Interval/Specification
Check belt tension after the first hour of operation
and at least twice during the first 24 hours of
operation. Belt must be tight enough to not slip
during heavy loads while cutting grass. Over
tensioning will reduce belt and spindle bearing life.
1. Stop the engine, set the parking brake and
remove the spark plug wire(s).
2. Remove the knobs and belt cover atop mower.
3. Loosen locknut and turnbuckle on idler arm.
Remove worn belt (Fig. 46).
4. Install new belt and adjust belt tension, loosen
the 5/16" locknut on turnbuckle and rotate the
turnbuckle toward the rear of mower to tighten
or toward the front of mower to loosen belt
tension (Fig. 46).
Note: Proper belt tension will require about
20 lbs. side pull on belt, halfway
between pulleys, to deflect belt 1/2".
5. Check belt guide clearance on the mower belt.
The four welded belt guides on the mower
should be located 1/8" from the belt. Adjust if
necessary.
1
Figure 46
1. 1/2" (13 mm) deflection
here
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