Telehandlers are machinery which are designed to operate in rough environment, however, that doesn't mean that they could be driven without any consideration for the environment. These equipments have a much bigger risk of tipping over or load loss when they are traveling on slopes.
If you do have to travel on a slope, make certain that you proceed carefully and slowly while keeping the load low. Before getting on the slope, downshift to 4WD and a lower gear. Using the engine brake would really help to control the telehandler's speed. Try not to turn on a slope if possible. If you need to make the turn, take it as wide as possible and use extreme care.
Under any conditions, avoid driving across excessively steep slopes. Ascend and descend slopes with the heavy end of the telehandler pointing up the incline. Even when the forks have no cargo, the machine's counterweighted rear is fairly heavy; therefore, it could be necessary to drive backwards 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.
On a mixed jobsite, operator training is really essential. The coordinated steering machines, along with the rear-pivot machinery usually operate on the same jobsite where everybody is allowed to utilize all of the machines. In this case, an individual who is used to operating a coordinated steer equipment can jump onto a rear-pivot machinery. A really significant difference between how these two units operate has a lot to do with what part of the equipment extends outside of the turning radius.