Toro 74172 - Replacing the Pump Drive Belt; Adjustment Parking Brake

Maintenance
50
Replacing the Pump Drive Belt
Check pump drive belt for wear after every 50 hours
of operation.
1. Remove bolt from clutch strap and unplug clutch
electrical wire. (Fig. 46).
2. Pull spring loaded idler to side. Remove traction
belt from the engine and hydro pump pulleys
(Fig. 46).
3. Install new belt around engine and hydro pump
pulleys (Fig. 46).
4. Pull spring loaded idler to side and align belt.
Release pressure on spring loaded idler (Fig. 46).
M-4119
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2
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5
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6
Figure 46
1. Clutch Strap
2. Bolt
3.
Clutch Electrical Wire
4. Belt
5. Idler
6. Clutch
Adjustment Parking Brake
Check parking brake for proper adjustment.
1. Disengage brake lever (lever down).
2. Measure the length of the spring. Measurement
should be 2.75” (74 mm) between washers
(Fig. 47).
3. If adjustment is necessary, loosen the jam nut
below the spring and tighten the nut directly
below the yoke (Fig. 47). 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.
6. Measure the distance between the trunnion roller
and the collar on brake rod . Measurement
should be 3/16”–1/4” (5–7 mm) (Fig. 47).
7. If adjustment is necessary, loosen the jam nut
directly below the yoke. Turn the bottom
adjusting nuts until the correct measurement is
obtained (Fig. 47). Tighten jam nut at yoke
M-4120
11
2
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5
6
Figure 47
1. Brake lever
2. Spring 2.75” (74 mm)
3. Adjusting nuts
4. Collar on brake rod
5. 3/16”–1/4’ (5–7 mm)
6. Jam nut and yoke
7. Trunion