Komatsu D475A-5E0 Operation & Maintenance Manual page 246

MAINTENANCE
DUSTY WORKSITES:
When working at dusty worksites, do as follows:
Clean the radiator fins and other parts of the heat exchange equipment more frequently, and take care not to let
the fins become clogged.
Replace the fuel filter more frequently.
Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
When checking and replacing the oil or filters, move the machine to a place where there is no dust and take care
to prevent dust from entering the system.
AVOID MIXING OILS:
If a different brand or grade of oil has to be added, drain the old oil and replace all the oil with the new brand or grade
of oil. Never mix different brand or grade of oil.
LOCKING INSPECTION COVERS:
Lock inspection cover securely into position with the lock bar. If inspection or maintenance is performed with
inspection cover not locked in position, there is a danger that it may be suddenly blow shut by the wind and cause
injury to the worker.
BLEEDING AIR:
When hydraulic equipment has been repaired or replaced, or the hydraulic piping has been removed and installed
again, the air must be bled from the circuit. For details, see "BLEEDING AIR IN HYDRAULIC SYSTEM (PAGE
4-51)".
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 sharply. If they are installed so, their service life will
be shortened extremely and they may be damaged.
CONTROLLER:
The controller for the machine monitor may be actuated mistakenly by radio wave interference from the outside, so
when installing any radio control equipment to the machine, consult your Komatsu distributor.
CHECKS AFTER INSPECTION AND MAINTENANCE:
If you forget to perform the checks after inspection and maintenance, unexpected problems may occur, and this may
lead to serious injury or death. Always observe the following:
Checks after operation (with engine stopped)
Have any inspection and maintenance points been forgotten?
Have all inspection and maintenance items been performed correctly?
Have any tools or parts been dropped inside the machine? It is particularly dangerous if parts are dropped
inside the machine and get caught in the lever linkage mechanism.
Are there any leakage of coolant or oil? Have all nuts and 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 2-31)" in 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.
GUIDES TO MAINTENANCE
4 - 3