Telehandlers are heavy duty work equipments produced particularly to work in rough environment. This however, does not mean they could be driven without regard on rough terrain. These machinery 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 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 actually help to control the speed of the telehandlers. Try to avoid turning on a slope if possible. If you must make the turn, use extreme care and take it as wide as possible.
Under any circumstances, avoid driving across excessively steep slopes. Descend and ascend slopes with the telehandler's heavy end pointing up the incline. Even when there is no load on the forks, the machine's counterweighted rear is quite heavy; hence, it can be required to drive in reverse up slopes. Once the telehandler is carrying a load, the front of the unit becomes the heavy end, and you could back the equipment down the slopes.
Operator training is extremely important on a mixed jobsite. Rear pivot machines would often operate on the same jobsite of coordinated steering machines, where everyone is permitted to use all of the machinery. In this case, an individual who is used to utilizing a coordinated steer equipment can jump onto a rear-pivot equipment. A very key difference between how these two units operate has a lot to do with what part of the machinery extends outside of the turning radius.