Telehandlers are heavy duty work machinery made specially to operate in rough terrain. This however, does not mean they can be driven without consideration on rough environment. These kinds of machines have a much 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 equipment 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 must make the turn, utilize extreme care and take it as wide as possible.
Under any circumstances, avoid driving across excessively steep slopes. Ascend and descend 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 quite heavy; thus, it can be necessary to drive backwards up slopes. When the telehandler is carrying a cargo, the front of the unit becomes the heavy end, and you would be able to back the equipment down the slopes.
Operator training is extremely important on a mixed jobsite. Rear pivot machines would normally operate on the same jobsite of coordinated steering machines, where everybody is allowed to utilize all of the machines. In this case, a person who is used to operating a coordinated steer equipment can jump onto a rear-pivot machine. A really key distinction between how these two units work depends on which part of the machinery extends outside of the turning radius.