Replacing The Pump Drive Belt; Adjusting The Parking Brake - Toro 74239 Operator's Manual

2. Check if the machine pulls to one side. If it does, stop
the machine and set the parking brake.
3. Unlatch the seat and tip the seat up to access the
tracking knob.
Note: Determine the left and right sides of the machine
from the normal operating position.
4. To make the machine go right, turn the knob towards
the rightside of the machine. Refer to figure 56.
5. To make the machine go left, turn the knob towards
the leftside of the machine. Refer to figure 56.
6. Repeat this adjustment until the tracking is correct.
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Figure 56
1. Pump rod
2. Turn this way to track left

Replacing the Pump Drive Belt

Check pump drive belt for wear after every 50 hours of
operation.
1. Pull the spring loaded idler down and remove traction
belt from the engine and hydro pump pulleys (Fig. 57).
Remove belt between pulleys.
Figure 57
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3. Tracking knob
4. Turn this way to track right
42
2. Install new belt around engine and hydro pump pulleys
(Fig. 57).
3. Pull spring loaded idler down and align below traction
belt. Release pressure on spring loaded idler (Fig. 57).

Adjusting the Parking Brake

Check parking brake for proper adjustment.
1. Disengage brake lever (lever down).
2. Measure the length of the spring. Measurement should
be 2-3/4 inch (70 mm) between washers (Fig. 58).
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3
Figure 58
1. Brake lever
2. Spring 2.75 inch (70 mm)
3. Adjusting nuts
3. If adjustment is necessary, loosen the jam nut below
the spring and tighten the nut directly below the yoke
(Fig. 58). Turn the nut until the correct measurement is
obtained. Tighten the two nuts together and repeat on
opposite side of unit.
4. Turn nuts clockwise to shorten spring length and turn
counter–clockwise to lengthen the spring.
5. Engage parking brake, lever up.
A. Measure the distance between the trunnion roller
and the collar on brake rod. The measurement
should be 3/16–1/4 inch (5–7 mm) (Fig. 58).
6. If adjustment is necessary, loosen the jam nut directly
below the yoke. Turn the bottom rod until the correct
measurement is obtained (Fig. 58). Tighten jam nut at
yoke
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4. Collar on brake rod
5. 3/16–1/4 inch (5–7 mm)
6. Jam nut and yoke