Cub Cadet RZT 50 Operator's Manual page 64

USE THIS PAGE AS A GUIDE TO DETERMINE SLOPES WHERE YOU MAY NOT OPERATE SAFELY.
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SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE
15 °
WARNING
Do not mow on inclines with a slope ,n excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet).
A riding mower could overturn and cause serious injury. If operating a walk-behind mower on such a slope, it is
extremely difficult to maintain your footing and you could slip, resulting in serious injury.
Operate RZT zero turn tractors across the face of slopes rather than up and down. Begin with the first pass
across the bottom of the slope and turn uphill at the end of each pass whenever possible.