Komatsu PC118MR-8, Руководство по эксплуатации и обслуживанию

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MAINTENANCE
MAINTENANCE PROCEDURES
4-77
CHANGING THE HYDRAULIC OIL AND CLEANING THE INTAKE FILTER 4
(Only for machines in which synthetic biodegradable oil HEES is used)
WARNING
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Retract the arm and bucket cylinders completely, rest the bucket teeth on the ground and, after
stopping the engine, eliminate the residual pressures from the equipment (by shifting the controls
more than once) and from the tank (by slowly loosening the filler cap).
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Soon after the machine has been stopped, the hydraulic oil is very hot and may cause burns; let it cool
down to 40–45° C before carrying out this maintenance operation.
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Do not start the engine with empty tank, since this would certainly damage the pump.
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Immediately clean any area dirty with oil.
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Oils, filters, the coolant and the battery are considered special waste and must be collected and
disposed of according to the regulations in force.
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It is not possible to mix the synthetic biodegradable oil type HEES with ordinary hydraulic oils, since
when the temperature increases insoluble compounds are generated, which deposit on the filters and
clog them (the maximum concentration of ordinary oil must not exceed 1% of the total quantity of oil).
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Biodegradable oil can be used only in the hydraulic system; it cannot be used for the engine, the
transmissions, the braking system, etc.
NOTICE
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On new machines the oil must be changed after the first 500 hours of operation and successively
every 2000 hours, and in any case at least once a year.
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If the machine is equipped with hydraulic breaker, the hydraulic oil deteriorates much earlier than
during normal bucket operations. For further details on maintenance, see "MAINTENANCE
INTERVALS IN CASE OF USE OF THE HYDRAULIC BREAKER (4-23)".
1. Turn the turret so that the lower part of the hydraulic oil
tank is not covered by the tracks.
2. Retract the arm and bucket cylinders completely and lower
the boom until the bucket teeth rest on the ground.
3. Lower the blade to the ground.
4. Stop the engine and eliminate the residual pressure from
the work equipment (by shifting the controls more than
once).
5. Take the safety device lever to LOCK position (L), stop the
engine and eliminate the remaining pressure of the
equipment (moving the commands many times).
WEAM014802