Komatsu PC138USLC Operation & Maintenance Manual page 187

MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
1) The buzzer sounds for approx. 2 seconds, then the monitor
or meter lights up for approx. 2 seconds.
Charge level monitor (4)
Engine oil pressure monitor (5)
Engine oil level monitor (6)
Engine coolant temperature gauge (7)
If any monitor does not light up or the buzzer does not
sound, there is probably a failure in the monitor, so please
contact your Komatsu distributor for repairs.
2) After approx. 2 seconds, the screen will change to the
working mode/travel speed display monitor. Next, it will
switch to the standard screen.
Engine coolant temperature gauge (7)
Engine coolant temperature monitor (8)
Fuel gauge (9)
Fuel level monitor (10)
Hydraulic oil temperature gauge (11)
Hydraulic oil temperature monitor (12)
3) If the hydraulic oil temperature gauge is out or caution lamp
(13) stays lighted up red, immediately check the item that
lights up red.
4) If the maintenance interval has passed, maintenance
interval monitor (14) lights up for 30 seconds. Press
maintenance switch F5 (15), check the item, and carry out
maintenance immediately.
For details of the method of checking the maintenance
interval, see "Maintenance Selector Switch (PAGE 3-38)"
in the explanation for each component.
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OPERATION OPERATION