Komatsu PC138USLC Operation & Maintenance Manual page 185

MACHINE OPERATIONS AND CONTROLS
Wind-in Type Seat Belt
Before fitting the seat belt, check that there is no problem in the belt mount bracket or mounting belt. If it is worn or damaged,
replace the seat belt.
Even if no problem can be seen in the belt, replace the seat belt every 3 years. The date of manufacture of the belt is shown on
the back of the belt.
Always wear the seat belt during operation.
Fit the seat belt so that it is not twisted.
Fastening and Removing Seat Belt
This seat belt has a wind-in device, so it is not necessary to adjust the length.
Fastening seat belt
Hold grip (2) and pull the belt out from wind-in device (1), check that
the belt is not twisted, then insert tongue (3) into buckle (4)
securely.
When doing this, pull the belt lightly to check that it is properly
locked.
Removing belt
Press button (5) in buckle (4), and remove tongue (3) from buckle
(4).
The belt is automatically wound in, so hold grip (2) and return the
belt slowly to wind-in device (1).
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WARNING
OPERATION