Brakes and Drive System
25
Brake puck/rotor replacement
On RZT-S Zeros, the brake pucks are wearing parts that will need to be serviced from time to time. If a mower is
operated with the parking brake dragging, the pucks will wear out rapidly and the brake rotor will develop hot spots. If
the mower is operated long enough, the rotor may have grinding marks on it with excessively worn pucks.
The brake pucks and rotors are serviced at the same time. To service the brake pucks:
1. Lift and safely support the rear of the mower.
2. Make sure the parking brake is released.
3. Remove the rear wheel of the side that is being ser-
viced.
4. Disconnect the brake rod by removing the bow tie clip
and sliding the rod out of the brake shaft’s bell crank.
See Figure 3.5.
5. Unhook the brake rod from the brake spring.
6. Unhook the brake spring from the cam arm.
See Figure 3.5.
If the rotor shows hot spots or any other signs of damage, including warpage, it must be
replaced. Failure to do so can result in the failure of the brakes
Figure 3.5
Brake rod
Bowtie clip
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