Telehandlers are heavy duty work machines produced specially to operate in rough environment. This however, does not mean they could be driven without consideration on rough environment. These kinds of equipments have a a lot bigger risk of tipping over or load loss when they are traveling on slopes.
If you do need to travel on a slope, make sure that you proceed slowly and carefully while keeping the load low. Prior to getting on the slope, downshift to 4WD and a lower gear. Utilizing the engine brake will 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, take it as wide as possible and use extreme caution.
Always try to avoid driving across excessively steep slopes. Use the heavy end of the telehandler pointing up the incline, when descending and ascending slopes. Even when there is no cargo on the forks, the counterweighted rear of the machinery is quite heavy; thus, it could 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 would be able to back the machinery down the slopes.
On a mixed jobsite, operator training is really essential. The coordinated steering equipment, along with the rear-pivot equipment often operate on the same jobsite where everyone is allowed to operate all of the machinery. In this case, an individual who is used to using a coordinated steer machinery can jump onto a rear-pivot machine. A very significant difference between how these two units operate has a lot to do with which part of the machine extends outside of the turning radius.