Cleaning Under The Deck; Inspecting The Belts; Replacing The Deck Belt - Toro 74179 Operator's Manual

Note: Increase the tension by lengthening the push arms
and decrease the tension by shortening the push arms.
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1
Figure 52
1. Push arm
2. 15-5/1 in. (389 mm)
nominal

Cleaning Under the Deck

Remove grass build up under the deck daily.
1. Position the mower on a flat surface. Stop the engine,
set the parking brake, remove the key, and disconnect
the spark plug wire(s) from the spark plug(s).
2. Raise the deck to the transport position.
3. Lift the front of the unit and support the unit using jack
stands.
Danger
Mechanical or hydraulic jacks may fail to support
machine and cause a serious injury.
Use jack stand when supporting machine.
Do not use hydraulic jacks.

Inspecting the Belts

Inspect all belts every 100 hours.
Check belts for cracks, frayed edges, burn marks, or any
other damage. Replace damaged belts.

Replacing the Deck Belt

Squealing when the belt is rotating, blades slipping when
cutting grass, frayed belt edges, burn marks, and cracks are
signs of a worn deck belt. Replace the deck belt if any of
these conditions are evident.
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2
m–3740
3. Jam nut
4. Ball joint
1. Stop the engine, set the parking brake, remove the key,
and disconnect the spark plug wire(s) from the spark
plug(s).
2. Remove the belt covers over the outside spindles.
3. Loosen the outer nut on the spring eye bolt (Fig. 53).
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1 4 5
6
Figure 53
1. Outer nut
2. Idler pulley
3. Idler arm
4. Spring eye bolt
4. Remove the belt. Start at the outside pulley and rotate
the belt off (Fig. 54).
Note: Dot not remove the spring from the eye bolt.
Caution
Spring is under tension when installed and can
cause personal injury.
Do not remove spring from spring eye bolt.
5. Remove spring loaded idler pulley (Fig. 53).
6. Route the new belt through the idler arm (Fig. 53).
7. Install the idler pulley and route the belt onto the other
pulleys (Fig. 54).
8. Tighten the outer nut on the spring eye bolt (Fig. 53).
Note: Check the spring length. The spring should measure
9-3/8 1/8 in. (238 3 mm) when installed. Adjust it if it
does not (Fig. 53).
9. Install the belt covers over the outside spindles.
40
2
M–4197
Top View
5. Spring
6. 9-3/8 1/8 in.
(238 3 mm)
7. Deck belt
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