Komatsu WA380-8 Operation & Maintenance Manual page 241

OPERATION MACHINE OPERATIONS AND CONTROLS
Mirror C
Adjust it so that you can see a person adding DEF at DEF filler
port from the operator's seat.
Mirror D
Adjust it to the same installing angle as mirror C.
Install the mirror to a position where you can easily see the
hatched area in the figure.
The reference values of the visibility range are as follows.
Visibility range (left): 2500 mm
Visibility range (right): 2500 mm
Mirror A: Hatched area (a) must be in view.
Mirror B: Hatched area (b) must be in view.
Mirror C: Hatched area (c) must be in view.
Mirror D: Hatched area (d) must be in view.
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