Handling High-Pressure Pipes; Precautions To Be Taken When Handling High-Pressure Oil; Precautions For Maintenance Operations At High Temperatures; And High Pressure - Komatsu PC12R-8 Operation & Maintenance Manual

2.8.15 HANDLING HIGH-PRESSURE PIPES

• Do not bend high-pressure pipes 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.
• Always repair or replace any loose or faulty fuel or oil pipe. Any leakage of fuel or oil may cause fires.
2.8.16 PRECAUTIONS TO BE TAKEN
WHEN HANDLING HIGH-PRESSURE
OIL
• Do not forget that the work equipment circuits are always un-
der pressure; for this reason, when it is necessary to add or
drain hydraulic oil or to perform maintenance operations or in-
spections on the hydraulic circuit, it is advisable to lower the
equipment to the ground and completely release the pres-
sures 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.
2.8.17 PRECAUTIONS FOR MAINTE-
NANCE OPERATIONS AT HIGH
TEMPERATURES AND HIGH PRES-
SURE
• When the machine is stopped at the end of operations, the en-
gine 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) before carrying out the maintenance operations
in accordance with the procedures indicated in the relevant
sections of this manual).
PRECAUTIONS FOR MAINTENANCE
DANGEROUS!
CORRECT
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RWA01580
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