Komatsu D37EX-24 Operation & Maintenance Manual page 276

TROUBLES AND ACTIONS
Problem
Unusual noise is generated.
(Combustion or mechanical)
DEF level caution lamp is displayed
on monitor.
Action level or caution lamp is dis-
played on monitor.
Alarm buzzer sounds.
Engine suddenly loses power.
(Entered derate mode.)
IF MACHINE MONITOR SHOWS WARNING DISPLAY
When the action level display (1) or caution lamp (2) is shown
on the display of the machine monitor, press switch F5 to dis-
play the "Current Abnormality" screen and check the details
and remedy.
Take the actions according to the message shown on the ma-
chine monitor, and check the failure code, and then ask your
Komatsu distributor for repair, as necessary.
Telephone number for the point of contact if an error occurs
When an error screen is displayed on the monitor, press the
switch F5 to display the "Current Abnormality" screen and tele-
phone number (3) for the point of contact is displayed in the
message column at the bottom of the screen.
REMARK
If no point of contact telephone number is registered, no tele-
phone number is displayed.
Ask your Komatsu distributor for the telephone number regis-
tration if necessary.
3-218
Main causes
Low grade fuel being used
Overheating
Damage inside muffler
Excessive valve clearance
Lowering of DEF level
Contact your Komatsu distributor.
Contact your Komatsu distributor.
Contact your Komatsu distributor.
Remedy
Replace with specified fuel.
Refer to "Engine coolant temperature
caution lamp lights up" shown above.
Replace muffler. (*)
Adjust valve clearance. (*)
Add DEF.
OPERATION