Telehandlers are heavy duty work machines produced specifically to work in rough environment. This however, does not mean they could be driven without consideration on rough environment. These kinds of machinery have a much greater risk of tipping over or load loss when they are traveling on slopes.
When traveling on a slope, make sure that you move slowly with the machinery while also keeping the load low. Downshift to 4WD and a lower gear, prior to getting on the slope. Utilizing the engine brake would help to control the telehandler's speed. Try to avoid turning on a slope if possible. If you must make the turn, use extreme caution and take it as wide as possible.
Always try not to drive across excessively steep slopes. Use the heavy end of the telehandler pointing up the incline, when descending and ascending slopes. Even when there is no cargo on the forks, the machine's counterweighted rear is fairly heavy; hence, it could be required to drive in reverse up slopes. Once the telehandler is carrying a cargo, the front of the unit becomes the heavy end, and you can back the machinery down the slopes.
Operator training is hugely important on a mixed jobsite. Rear pivot machinery will usually operate on the same jobsite of coordinated steering machinery, where everyone is permitted to use all of the machines. In this case, a person who is used to using a coordinated steer machinery could jump onto a rear-pivot machinery. A very significant difference between how these two units work has a lot to do with which part of the equipment extends outside of the turning radius.