Replacing The Pump Drive Belt; Adjusting The Parking Brake - Toro 74179 Operator's Manual

4
2
Figure 54
Top View
1. Deck belt
2. Idler arm
3. Outside pulley

Replacing the Pump Drive Belt

Check the pump drive belt for wear after every 50 hours of
operation.
1. Remove the deck belt first; refer to Replacing the Deck
Belt, page 40.
2. Remove the bolt from the clutch strap and unplug the
clutch electrical wire (Fig. 55).
3. Pull the spring loaded idler to the side. Remove the
traction belt from the engine and hydro pump pulleys
(Fig. 55).
4. Install the new belt around the engine and hydro pump
pulleys (Fig. 55).
5. Pull the spring loaded idler to the side and align the
belt. Release pressure on the spring loaded idler
(Fig. 55).
6. Install the deck belt.
1
5
3
M–4159
4. Spring
5. Idler pulley
41
3
5
4
Figure 55
1. Clutch strap
2. Bolt
3. Clutch electrical wire

Adjusting the Parking Brake

Check the parking brake for proper adjustment.
1. Disengage the brake lever (lever down).
2. Measure the length of the spring. The measurement
should be 2-3/4 in. (74 mm) between the washers
(Fig. 56).
3. If an adjustment is necessary, loosen the jam nut below
the spring and tighten the nut directly below the yoke
(Fig. 56). Turn the nut until the correct measurement is
obtained. Tighten the two nuts together and repeat on
the opposite side of the unit.
4. Turn the nuts clockwise to shorten the spring length and
turn them counterclockwise to lengthen the spring.
5. Engage the parking brake, lever up.
6. Measure the distance between the trunnion roller and
the collar on the brake rod. The measurement should be
3/16–1/4 in. (5–7 mm) (Fig. 56).
7. If an adjustment is necessary, loosen the jam nut
directly below the yoke. Turn the bottom adjusting nuts
until the correct measurement is obtained (Fig. 56).
Tighten the jam nut at the yoke.
1
6
2
m–4119
4. Belt
5. Idler
6. Clutch