Komatsu PC118MR-8 Operation And Maintenance Manual page 210

FUNCTIONING
USE OF THE MACHINE AND RELATED CONTROLS
Mirrors (C) and (D)
Adjust the mirror (C) in a way that will enable the driver sitting
in his/her seat to view the rear of the machine.
Adjust the mirror (D) in a way that will enable the driver sitting
in his/her seat to view any people standing at a 1 m distance
from the machine.
3-126
WEAM014802