Komatsu PC290LC-11 Operation & Maintenance Manual page 176

EXPLANATION OF COMPONENTS OPERATION
CAB DOOR HINGE
The cab door hinge has 2 rotation axes with stoppers (S).
REMARK
When opening and closing the cab door, hitting sound of stop-
per (S) is heard, but this is not a failure.
CAP AND COVER WITH LOCK
Use the starting switch key to open and close the locks on the caps and covers.
Insert the key as far as it will go to the shoulder (A) and turn it.
If the key is turned when it is not inserted all the way to the
end, it may break.
DRINK BOX
It is provided on the rear right side of the operator's seat to
store drinks.
Air according to the setting of the air conditioner blows into the
drink box.
3-104