Inspecting Belts; Replacing The Mower Belt; Adjusting The Mower Belt Tension - Toro 74242 Z500 Z Master Operator's Manual

Inspecting Belts

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

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 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.
3. Remove the belt covers (Fig. 71).
4. Loosen the nut securing the idler plate and move the
idler plate to relieve the belt tension on the idler
pulley, then remove the worn mower belt (Fig. 73).
5. Install the new mower belt around the mower spindle
pulleys, mower idler pulley, into the belt guides, into
rear idler arm assembly, and the clutch (Fig. 70).
Important
Check the amount of twist in the belt
between the pulleys. Make sure it is only what is specified
in Figure 70.
5
3
2
Figure 70
1. Clutch
2. Mower belt
3. 1/4 turn belt twist
6. Adjust the belt tension, refer to Adjusting the Mower
Belt Tension; page 48.
7. Install the belt covers and close the latches (Fig. 71).
1
3
3
4
3
4
6
m–6825
4. Belt guide
5. Mower spindle pulley
6. Mower idler pulley
2
1
Figure 71
1. Belt cover
Adjusting the Mower Belt
Tension
1. Disengage the 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.
3. Raise the mower to the transport position.
Important Check the amount of twist in the belt
between the pulleys. Make sure it is only what is specified
in Figure 70.
Important Check and make sure the belt is installed
into both the front and rear belt guides (Fig 72).
4. Check the belt tension. The spring loaded idler center
bolt needs to be near the top alignment hole in left
support plate (Fig 72).
3
1
Figure 72
1. Center bolt
2. Alignment hole
48
1
m–6824
2. Latch
1
2
M–4417
3. Left support plate
4. Spring loaded idler