Telehandlers are machines which are meant to work in rough terrain, however, that doesn't mean that they could be driven without any consideration for the environment. These types of equipments have a much bigger risk of load loss or tipping over when they are traveling on slopes.
When traveling on a slope, make certain that you move slowly with the machine 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 to avoid turning on a slope if possible. If you must make the turn, utilize extreme caution and take it as wide as possible.
Under any circumstances, do not drive across extremely steep slopes. Ascend and descend slopes with the heavy end of the telehandler pointing up the incline. Even when there is no load on the forks, the machine's counterweighted rear is quite heavy; hence, it could be necessary to drive backwards up slopes. Once the telehandler is carrying a load, the front of the unit becomes the heavy end, and you would be able to back the equipment down the slopes.
Operator training is hugely important on a mixed jobsite. Rear pivot machinery would usually operate on the same jobsite of coordinated steering machinery, where everybody is permitted to utilize all of the machinery. In this instance, a person who is used to utilizing a coordinated steer equipment could jump onto a rear-pivot machinery. A very key difference between how these two units operate has a lot to do with which part of the machine extends outside of the turning radius.