JLG EC450AJ Operation & Safety Manual page 61

Machine Operation
BM001074A
Figure 5. Traveling on a Grade
NOTICE
If the boom is over the front (steer) axle, direction of steer and drive movement will
be opposite from the movement of the controls.
BM001073A
Figure 6. Grade and Side Slope
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EC450AJ, EC520AJ 31219187