Telehandlers are heavy duty work machinery made particularly to operate in rough environment. This however, does not mean they could be driven without regard on rough terrain. 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, ensure that you proceed carefully and slowly while keeping the load low. Prior to getting on the slope, downshift to 4WD and a lower gear. Utilizing the engine brake would really help to control the telehandler's speed. Try to avoid turning on a slope if possible. If you need to make the turn, take it as wide as possible and utilize extreme care.
Under any conditions, 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 cargo on the forks, the machine's counterweighted rear is fairly heavy; therefore, it can be required to drive backwards up slopes. Once the telehandler is carrying a load, 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 essential. The coordinated steering machines, along with the rear-pivot machinery normally work on the same jobsite where everyone is allowed to operate all of the machinery. In this instance, a person who is used to operating a coordinated steer machine could jump onto a rear-pivot machine. A really key difference between how these two units work has a lot to do with what part of the machine extends outside of the turning radius.