Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual, Page: 321 / 504

MAINTENANCE
MAINTENANCE INFORMATION
4-3
Do not Drop Things Inside Machine
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When opening inspection windows or the oil filler port of the tank to carry out inspection, be careful not to drop
nuts, bolts, or tools inside the machine.
If such things are dropped inside the machine, it may cause damage and/or malfunction of the machine, and
will lead to failure. If you drop anything inside the machine, always remove it immediately.
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Do not put unnecessary things in your pockets. Carry only things which are necessary for inspection.
Dusty Jobsite
When working at dusty worksites, do as follows:
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Clean the radiator fins and other parts of the heat exchange equipment more frequently, and take care not to
let the fins become clogged.
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Replace the fuel filter more frequently.
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Clean electrical components, especially the starting motor and alternator, to avoid accumulation of dust.
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Clean the fuel tank breather and make sure that dust is not accumulated.
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Clean in the hydraulic tank breather and make sure the dust is not accumulated.
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Clean and replace the hydraulic tank element more frequently.
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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 (4-
49)“.
Hydraulic Hose Installation
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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.
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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.