Telehandlers are heavy duty work machines produced particularly to operate in rough terrain. This however, does not mean they can be driven without consideration on rough environment. These machines have a much bigger risk of tipping over or load loss when they are traveling on slopes.
When traveling on a slope, make certain that you move slowly with the equipment while also keeping the load low. Downshift to 4WD and a lower gear, prior to getting on the slope. Using the engine brake will actually help to control the telehandler's speed. Try not to turn on a slope if possible. If you have to make the turn, take it as wide as possible and utilize extreme caution.
Under any conditions, avoid driving across extremely steep slopes. Ascend and descend slopes with the heavy end of the telehandler pointing up the incline. Even when there is no cargo on the forks, the counterweighted rear of the machine is quite heavy; hence, it can be required to drive in reverse up slopes. When the telehandler is carrying a cargo, the front of the unit becomes the heavy end, and you could back the equipment down the slopes.
Operator training is hugely important on a mixed jobsite. Rear pivot machines will often operate on the same jobsite of coordinated steering machinery, where everybody is allowed to use all of the equipment. In this case, an individual who is used to operating a coordinated steer machine could jump onto a rear-pivot machine. A very key distinction between how these two units operate has much to do with which part of the equipment extends outside of the turning radius.