Inspecting The Belts; Replacing The Mower Belt - Toro 74920 Operator's Manual

then tighten the four leveling adjust locking nuts
(Figure 72).
1 2 3
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1. Deck lift arm
2. Deck hanger
3. Leveling adjust locking nut 6. Rear deck hanger bracket
5. Recheck that blocks fit just snugly under the deck
skirt. Make sure all attachment bolts are tight
6. Verify the deck is level by checking the side-to-side
level and front-to-rear blade slope; repeat deck
leveling procedure if necessary.

Inspecting the Belts

Service Interval: Every 50 hours
Check the belts for squealing when the belt is rotating,
blades slipping when cutting grass, frayed belt edges,
burn marks and cracks are signs of a worn mower belt.
Replace the mower belt if any of these conditions are
evident.

Replacing the Mower Belt

Squealing when the belt is rotating, blades slipping when
cutting grass, frayed belt edges, burn marks and cracks
are signs of a worn mower belt. Replace the mower belt
if any of these conditions are evident.
1. Disengage the blade control switch (PTO), move the
motion control levers to the neutral locked position
and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
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1
Figure 72
4. Slot in deck hanger
5. Slot in rear deck hanger
bracket
3. Lower the mower to the 3 inch (76 mm) height-of-cut
position.
4. For each of the belt covers, loosen the two bolts but
do not remove them. Slide the cover until it is clear
of the bolts and lift it up and out to remove it.
3
5. Remove the floor pan to access the idler pulley;
5
refer to the Removing the Floor Pan procedure in
Premaintenance.
6. Using a spring removal tool, (Toro part no. 92-5771),
remove the idler spring from the deck post to remove
tension on the idler pulley (Figure 73).
1
1. Spring removal tool (Toro
part no. 92-5771)
2. Idler spring
3. Deck post
7. Lower the mower to the lowest height-of-cut. Place
the height-of-cut pin in the lock position for lowest
height-of-cut.
8. Remove the belt from the mower deck pulleys and
remove the existing belt.
9. Install the new belt around the mower pulleys and
the clutch pulley under the engine (Figure 73).
WARNING
The spring is under tension when installed and
can cause personal injury.
Be careful when removing the belt.
10. Using a spring removal tool, (Toro part no. 92-5771),
install the idler spring over the deck post and
placing tension on the idler pulley and mower belt
(Figure 73).
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2
4
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Figure 73
4. Idler arm
5. Mower belt
3
5