Belt Maintenance; Inspecting The Belts; Replacing The Mower Belt - Toro Z Master 4000 Series Operator's Manual

Belt Maintenance

Inspecting the Belts

Service Interval: Every 50 hours
Replace the belt if it is worn. The signs of a worn belt
include squealing while the belt is rotating; the blades
slipping while cutting grass; and frayed edges, burn
marks, and cracks on the belt.

Replacing the Mower Belt

1. Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3. Lower the mower to the 76 mm (3 inches) height
of cut.
4. Remove the belt covers
Figure 73
5. Use a 3/8-inch ratchet in the square hole in the
idler arm to remove tension on the idler spring
(Figure 74).
6. Remove the belt from the mower-deck pulleys
and the clutch pulley.
7. Remove the belt guide on the spring-loaded
idler arm (Figure
8. Remove the existing belt.
9. Install the new belt around the mower pulleys
and the clutch pulley under the engine
74).
(Figure 73).
74).
(Figure
1. Spring
2. Clutch pulley
3. Mower belt
10. Install the belt guide on the idler arm
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11. Using the 3/8-inch ratchet in the square hole,
install the idler spring
Note:
Ensure that the spring ends are seated
in the anchor grooves.
12. Install the belt covers
56
Figure 74
4. Spring-loaded idler
assembly
5. Ratchet
6. Square hole in the idler
arm for the ratchet
(Figure
(Figure 74).
(Figure 75).
g334846
74).