Komatsu D65EX-12 Operation & Maintenance Manual page 172

GUIDE TO MAINTENANCE
LOOKING THE INSPECTION COVERS:
When carrying out maintenance with the inspection cover open, lock it in position securely with a lock bar. If
inspection or maintenance is carried out with the inspection cover open and not locked in position, there is a haz-
ard that it may be suddenly blown shut by the wind and cause injury to the worker.
HYDRAULIC SYSTEM - AIR BLEEDING
After repairing or replacing the hydraulic equipment or after removing the hydraulic piping, it is necessary to bleed
the air from the circuit. For details, see "PROCEDURE FOR BLEEDING AIR OF HYDRAULIC SYSTEM (PAGE 4-
40)".
PRECAUTIONS WHEN INSTALLING HYDRAULIC HOSES
When removing parts at locations where there are O-rings or gasket seals, clean the mounting surface, and
replace with new parts.
When doing this, be careful not to forget to assemble the O-rings and gaskets.
When installing the hoses, do not twist them or bend them into loops with a small radius.
This will cause damage to the hose and markedly reduce its service life.
CHECK AFTER INSPECTION AND MAINTENANCE WORKS:
If you forget to carry out the checks after inspection and maintenance, unexpected problems may occur, and this
may lead to serious injuly or property damage. Always do as follows.
Checks after operation (with engine stopped)
Have any inspection and maintenance points been forgotten?
Have all inspection and maintenance items been carried out correctly?
Have any tools or parts been dropped inside the machine? It is particularly dangerous if parts are dropped
inside machine and get caught in the lever linkage mechanism.
Is there any leakage of water or oil? Have all the bolts been tightened?
Checks when engine is running
For the checks when the engine is running, see "TWO WORKERS FOR MAINTENANCE WHEN ENGINE
IS RUNNING (PAGE 2-29)" in the SAFETY section, and take care of safety sufficiently.
Check that the inspected and maintained parts work normally.
Raise the engine speed and check for fuel leakage and oil leakage.
FUEL AND LUBRICANTS TO MATCH THE AMBIENT TEMPERATURE
Select the fuel and lubricants to match the ambient temperature.
For details, see "USE OF FUEL, COOLANT AND LUBRICANTS ACCORDING TO AMBIENT TEMPERATURE
(PAGE 4-12)".
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MAINTENANCE