Telehandlers are heavy duty work machinery made particularly to work in rough environment. This however, does not mean they could be driven without regard on rough terrain. These machines have a a lot greater risk of tipping over or load loss when they are traveling on slopes.
When traveling on a slope, make sure that you move slowly with the equipment while also keeping the load low. Downshift to 4WD and a lower gear, before getting on the slope. Utilizing the engine brake would help to control the speed of the telehandlers. 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, do not drive across excessively steep slopes. Descend and ascend slopes with the heavy end of the telehandler pointing up the incline. Even when there is no cargo on the forks, the machine's counterweighted rear is fairly heavy; hence, it can be required to drive in reverse up slopes. When the telehandler is carrying a load, the front of the unit becomes the heavy end, and you will be able to back the machine down the slopes.
Operator training is hugely important on a mixed jobsite. Rear pivot machinery would often operate on the same jobsite of coordinated steering equipment, where everybody is allowed to utilize all of the machines. In this instance, an individual who is used to using a coordinated steer equipment could jump onto a rear-pivot machinery. A very significant difference between how these two units work depends on what part of the machine extends outside of the turning radius.