Komatsu PC18MR-3, Руководство по эксплуатации и техническому обслуживанию

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PRECAUTIONS FOR MAINTENANCE
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2.8.19 HANDLING HIGH-PRESSURE HOSES
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Do not bend high-pressure hoses or rub them with abrasive or cutting objects.
Do not use any bent or cracked pipes or hoses that were previously rejected because of leaks or fastening de-
fects, since they may burst during use.
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Always repair or replace any loose or faulty fuel or oil pipe. Any leakage of fuel or oil may cause fires.
2.8.20 PRECAUTIONS TO BE TAKEN WHEN
HANDLING HIGH-PRESSURE OIL
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Do not forget that the work equipment circuits are always under
pressure; for this reason, when it is necessary to add or drain
hydraulic oil or to perform maintenance operations or inspec-
tions on the hydraulic circuit, it is advisable to lower the equip-
ment to the ground and completely release the pressures and
the residual pressure present in the tank.
Small leakages from pipes under pressure and the resulting jets
are extremely dangerous, since they can perforate the skin and
penetrate in the blood circulation or injure the eyes.
For this reason, always wear goggles and thick gloves during
the inspections and use a piece of cardboard or a sheet of ply-
wood to check for oil leakages.
If you are hit by a jet of high-pressure oil or are injured, even if
slightly, immediately consult a doctor.
2.8.21 PRECAUTIONS FOR MAINTENANCE
OPERATIONS AT HIGH TEMPERA-
TURES AND HIGH PRESSURE
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When the machine is stopped at the end of work, the engine
coolant, the oil and all the components are hot and the hydralic
circuits are under pressure.
In these conditions, if the coolant, the hydraulic oil and the en-
gine oil are to be drained in order to change them or the filters,
there are serious risks of damage and burns.
Wait for the temperature to lower within the normal operating
range (40-45°C) before carrying out any maintenance opera-
tion.
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