Adjusting The Mower Belt Tension; Adjusting The Blade Brake - Toro 30197 Operator's Manual

Figure 47
1. Idler pulley
2. 1/2 in. (13 mm) deflection
here
7. Engage PTO lever and check the clearance between the
bellcrank and the transmission output shaft (Fig. 48).
Space should be 1/16–1/8 in. (2mm–3mm).
8. Remove hairpin cotter and clevis pin from bellcrank.
Rotate clevis clockwise on rod to increase or
counterclockwise to decrease clearance (Fig. 48).
1
4
5
Figure 48
1. 1/16–1/8 in. (2mm–3mm)
2. Bellcrank
3. Transmission output shaft
9. Disengage the PTO. If the assist arm does not contact
the front stop on the mower deck (Fig. 47), readjust the
clevis to bring the bellcrank closer to the transmission
output shaft (Fig. 48).
10. Check the belt guide under the engine frame for proper
adjustment (Fig. 46). The distance between the belt
guide and mower belt should be 1-3/8 in. (35mm).
Adjust as necessary. The disengaged belt should not
drag or fall off pulley when guides are properly
adjusted.
1
3
4
2
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3. Assist arm
4. Front stop
3
2
6
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4. Hairpin cotter
5. Clevis pin
6. Clevis
Adjusting the Mower Belt
Tension
Service Interval/Specification
Check belt tension after the first 8 and 25 hours of
operation. Check the belt tension every 50 hours.
Important Belt must be tight enough to not slip during
heavy loads while cutting grass. Over tensioning will
reduce belt and spindle bearing life.
1. Disengage the power take off (PTO), set the parking
brake, and turn the engine off.
2. Loosen locknut on turnbuckle (Fig. 49).
3. Rotate turnbuckle toward rear of mower to increase
tension on belt. Rotate turnbuckle toward front of
mower to decrease tension on belt (Fig. 49).
Note: The eyebolt threads on both ends of the turnbuckle
should be engaged a minimum of 5/16 in. (8mm).
3
4
5
1. Locknut
2. Turnbuckle
3. Rear idler pulley
4. If the belt is still loose after making adjustments to the
turnbuckle, reposition the rear idler pulley to the front
hole. The belt guide next to the pulley must also be
moved to the front hole (Fig. 49).
5. Readjust the turnbuckle.

Adjusting the Blade Brake

1. Disengage the power take off (PTO), set the parking
brake, and turn the engine off.
2. If necessary, adjust the spring mounting bolts so that the
blade brake pad rubs against the pulley edges (Fig. 50).
3. Adjust the nut at the end of the blade brake rod until
there is 1/8–3/16 in. (3mm–5mm) between the nut and
spacer (Fig. 50).
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Figure 49
4. Front position for idler
pulley
5. Belt guide
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