Komatsu PC30MR-5 Operation & Maintenance Manual page 256

TROUBLES AND ACTIONS
Problem
Exhaust gas color is white or bluish.
Exhaust gas turns black from time to
time.
Combustion makes breathing sound
from time to time.
Abnormal noise is generated.
(combustion or mechanical noise)
IF MACHINE MONITOR SHOWS WARNING DISPLAY
When the action level display (1) or caution lamp (2) is dis-
played on the machine monitor, press the function switch "F3"
to display "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.
When "DXA8KA" or "DXA8KB" is on "Current Abnormality"
screen, turning the pump secondary drive switch to upper
(emergency) position enables operations temporarily.
For details of the pump secondary drive switch, see "PUMP
SECONDARY DRIVE SWITCH".
Immediately ask your Komatsu distributor for an inspection and
repair after the operation.
Telephone number for the point of contact if an error occurs
When an error screen is displayed on the machine monitor,
press the function switch "F3" to display "Current Abnormality"
screen, and the telephone 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.
3-190
Main causes
Excessive oil in oil pan
Improper fuel
Clogged air cleaner element
Defective nozzle
Improper compression
Defective nozzle
Low grade fuel being used
Overheating
Excessive valve clearance
WENAM00150
Remedy
Make the oil filled to the specified lev-
el by referring to CHECKS BEFORE
STARTING.
Replace with specified fuel.
Clean or replace by referring to
WHEN REQUIRED.
Replace nozzle. (*)
Adjust valve clearance. (*)
Replace nozzle. (*)
Replace with specified fuel.
See the preceding section on "The
graduation of engine coolant temper-
ature gauge indicates red range".
Adjust valve clearance. (*)
OPERATION