Telehandlers are heavy duty work machinery produced specifically to operate in rough environment. This however, does not mean they could be driven without consideration on rough terrain. These kinds of machines have a a lot greater risk of load loss or tipping over when they are traveling on slopes.
When traveling on a slope, make sure that you move slowly with the machinery while also keeping the load low. Downshift to 4WD and a lower gear, prior to getting on the slope. Using the engine brake would actually help to control the speed of the telehandlers. Try not to turn on a slope if possible. If you need to 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 the forks have no load, the counterweighted rear of the machine is quite heavy; thus, it can be necessary to drive backwards 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.
On a mixed jobsite, operator training is very important. The coordinated steering machines, along with the rear-pivot equipment normally work on the same jobsite where everybody is allowed to operate all of the machines. In this case, an individual who is used to utilizing a coordinated steer equipment could jump onto a rear-pivot machine. A really significant distinction between how these two units work depends on what part of the machine extends outside of the turning radius.