Telehandlers are machines which are meant to work in rough terrain, although, that doesn't mean that they can be driven without any consideration for the environment. These types of equipments have a much greater risk of load loss or tipping over when they are traveling on slopes.
If you do have to travel on a slope, ensure that you proceed slowly and carefully while keeping the load low. Before getting on the slope, downshift to 4WD and a lower gear. 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, utilize extreme care and take it as wide as possible.
Under any conditions, avoid driving across excessively steep slopes. Ascend and descend slopes with the telehandler's heavy end pointing up the incline. Even when there is no load on the forks, the counterweighted rear of the machinery is fairly heavy; thus, it can be required to drive backwards up slopes. When the telehandler is carrying a cargo, the front of the unit becomes the heavy end, and you will be able to back the equipment down the slopes.
On a mixed jobsite, operator training is really important. The coordinated steering equipment, along with the rear-pivot machines usually operate on the same jobsite where everyone is permitted to utilize all of the equipment. In this instance, a person who is used to using a coordinated steer machinery can jump onto a rear-pivot machinery. A very significant difference between how these two units work has a lot to do with what part of the machine extends outside of the turning radius.