Telehandlers are machinery that are meant to operate in rough environment, however, that doesn't mean that they can be driven without any regard for the terrain. These machinery have a a lot bigger risk of tipping over or load loss when they are traveling on slopes.
If you do need to travel on a slope, make sure that you proceed carefully and slowly while keeping the load low. Prior to getting on the slope, downshift to 4WD and a lower gear. Using the engine brake would help to control the telehandler's speed. Try not to turn on a slope if possible. If you must make the turn, use extreme caution and take it as wide as possible.
Under any conditions, do not drive across very 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 counterweighted rear of the machinery is quite 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 could back the machinery down the slopes.
Operator training is extremely essential on a mixed jobsite. Rear pivot machinery will normally operate on the same jobsite of coordinated steering machinery, where everybody is allowed to operate all of the machines. In this case, an individual who is used to operating a coordinated steer equipment can jump onto a rear-pivot equipment. A really significant distinction between how these two units work depends on which part of the machinery extends outside of the turning radius.