Komatsu PC220LC -8 Operation & Maintenance Manual page 264

MAINTENANCE
Dusty Jobsite
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 Lubricants
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 the 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.
Hydraulic System - Air Bleeding
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 FROM HYDRAULIC SYSTEM (PAGE
4-46)".
Hydraulic Hose Installation
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 Works
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?
Checks when operating engine
For details of the checks when operating the engine, see "TWO WORKERS FOR MAINTENANCE WHEN
ENGINE IS RUNNING (PAGE 2-37)" and pay careful attention to safety.
Are the inspection and maintenance items working properly?
Is there any leakage of fuel or oil when the engine speed is raised?
Close engine hood securely
When closing the engine hood after inspection or maintenance, make sure that the catch is securely locked. Hold
the grip of the engine hood and raise it slightly. If it does not open, the catch is locked.
If the engine hood catch is not locked, there is danger that the engine hood may open.
MAINTENANCE INFORMATION
4 - 3