Cub Cadet RZT-S Series - Manual (Page 113)

Decks and Lift Shaft
107
Deck belt
The cutting deck uses a single belt design.
The function of the deck belt is to transfer the mechanical force from the engine to the blades. The belt subjected
to a number of differing forces.
• Internal friction from the bending forces.
• The friction between the belt and the pulleys creates heat. The compression of the belt as it bends around
the pulleys also creates heat. All of this heat softens the belt which weakens it.
• Every time the electric PTO is engaged, the PTO belt is subjected to a tensile impact load. When the elec-
tric PTO is engaged, it goes from 0 to 3,600 RPM instantly. This can actually remove sections of the belt.
NOTE: Engaging the Electric PTO before the mowing deck is placed into the grass will reduce the impact load
on the belt.
• When a blade hits an object, like a rock or a tree root, the belt is subjected to an impact load similar to, but
greater than the impact load of engaging the electric PTO.
• The belt has rubber in it. As the rubber ages, it becomes brittle and weaker.
NOTE: A damaged belt can cause the deck to vibrate when the deck is engaged. The vibration can be bad
enough to simulate an engine issue.
NOTE: Not all belt damage is visible. Broken cords inside the belt are not visible to the naked eye, but can
cause vibration issues and greatly reduce the life of the belt.
To replace the 42” deck belt:
1. Remove the deck as described at the beginning of
this chapter.
NOTE: Removal of the deck is not necessary, but makes it
easier to route the belt around the spindles.
2. Loosen the idler pulleys enough to allow the belt to
slip between them and the belt keepers.
3. Slide the belt off of the pulleys.
4. Route the new belt around the pulleys.
See Figure 7.7.
5. Tighten the idler pulleys.
6. Install the deck as described at the beginning of this
chapter.
7. Test run the mower before returning to service.
! CAUTION ! CAUTION
Cub Cadet belts are design to fit our equipment and are not standard lengths. Use of a non-
OEM belt may prevent the mowing deck from working properly.
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Figure 7.7