Komatsu Galeo HD405-7R, Operation & Maintenance Manual

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MAINTENANCE
GUIDES TO MAINTENANCE
DUSTY WORKSITES:
When working at dusty worksites, do as follows:
Inspect the dust indicator frequently to see if the air cleaner is clogged.
Clean the air cleaner element at a shorter interval than specified.
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 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.
PRECAUTION WHEN REMOVING HYDRAULIC HOSE:
The hydraulic system is always under the internal pressure. When inspecting or replacing piping or hoses, always
check that the pressure in the hydraulic circuit has been released. If inspection or maintenance is carried out while
the circuit is still under pressure, it will lead to serious injury. For details of the method of releasing the pressure, see
each inspection and maintenance item.
In particular, with the brake circuit, depress the brake pedal at least 20 times to reduce the accumulator pressure
to 0 before the operation.
BLEEDING AIR FROM HYDRAULIC CIRCUIT:
If the hydraulic components have been repaired or replaced and if the hydraulic hoses, pipes, etc. have been
disconnected, it is necessary to bleed air in the circuit. See "WHEN REQUIRED (PAGE 4-22)".
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.
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