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OPERATION
Problem
Combustion makes breathing sound
from time to time.
Abnormal noise is generated.
(combustion or mechanical)
Engine stalls during operation.
The DEF level caution lamp lights.
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" and check the details and reme-
dy.
For the contents of the action level display and caution lamp,
see "ACTION LEVEL DISPLAY (3-20)".
•
When "DXA8KA" or "DXA8KB" or "DXA9KA" or DXA9KB is
on the "Current Abnormality" screen, it enables operations
temporarily by turning the pump secondary drive switch to
upper (emergency) position. For details of the switch, see
"PUMP SECONDARY DRIVE SWITCH (3-105)".
After that, immediately ask your Komatsu distributor for in-
spection and repair.
•
When the machine has not run out of fuel, if "CA2249" or
"CA559" is displayed on "Current Abnormality" screen, re-
place both fuel main filter and fuel prefilter immediately.
For details concerning replacement, see MAINTENANCE
"METHOD FOR REPLACING FUEL PREFILTER CARTRIDGE" and "METHOD FOR REPLACING FUEL
MAIN FILTER CARTRIDGE".
If "CA2249" or "CA559" is not cleared even after the replacement, ask your Komatsu distributor for inspec-
tion immediately, even though the machine can perform normal operation.
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.
Main causes
Defective nozzle
Low grade fuel being used
Overheating
Damage inside the muffler
Excessive valve clearance
Pre-filter, main filter clogged
Defective engine and fuel circuit
Low DEF level
WENAM00130
TROUBLES AND ACTIONS
Remedy
Replace nozzle (*)
Replace with specified fuel.
See the above section on "Indicator
of engine coolant temperature gauge
is in red range".
Replace muffler (*)
Adjust valve clearance (*).
Replace filter cartridge.
Check, repair (*)
Add DEF.
RKA61071
3-255
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