Case CX490D Operator's Manual page 119

Moreover, if the machine gets rearward and approaches
an uphill road, an object in the position (A) appears
aligned to the position (C) on the ground. Actually, the
position (C) on the ground is beyond the position (A): the
position (A) is rather aligned to the position (B) on the
ground. Therefore, there is a risk of collision between the
machine and the object if the machine is backed referring
to the position (A).
Similarly, if the machine gets rearward and approaches
a downhill road, an object in the position (A) appears
aligned to the position (C) on the ground. Actually, the
position (C) on the ground is beyond the position (A): the
position (A) is rather aligned to the position (B) on the
ground. Therefore, there is a risk of collision between the
machine and the object if the machine is backed referring
to the position (A).
3 - CONTROLS AND INSTRUMENTS
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