Komatsu WA380-6 Operation & Maintenance Manual page 240

MAINTENANCE
DUSTY WORKSITES:
When working at dusty worksites, do as follows:
Clean the radiator core frequently to avoid clogging.
Clean and replace the fuel filter frequently.
Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
When inspecting or changing the oil, move the machine to a place that is free of dust to prevent dirt from getting
into the oil.
AVOID MIXING OIL:
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 FROM HYDRAULIC CIRCUIT:
If the hydraulic oil equipments have been repaired or replaced and if the hydraulic hoses, pipes, etc. have been
disconnected, it is necessary to bleed air from the circuit. See "CHANGE OIL IN HYDRAULIC TANK, REPLACE
HYDRAULIC FILTER ELEMENT (PAGE 4-57)".
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.
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 property damage. Always do 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?
Check when the engine is running
See "TWO WORKERS FOR MAINTENANCE WHEN ENGINE IS RUNNING (PAGE 2-37)" in the section on
safety for checking when the engine is running. Pay attention to safety.
Check if the inspected and maintenance area is operating normally.
Increase the engine speed to check for fuel and oil leakage.
GUIDES TO MAINTENANCE
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