Komatsu PC110R-1, Operation & Maintenance Manual

Page: 49 / 212

PRECAUTIONS TO BE TAKEN DURING MAINTENANCE
47
2.8.15 PRECAUTIONS CONCERNING HIGH-PRESSURE HOSES
2.8.16 PRECAUTIONS TO BE TAKEN WHEN
WORKING ON HIGH-PRESSURE SYS-
TEMSE
2.8.17 PRECAUTIONS FOR MAINTENANCE
WORK INVOLVING HIGH TEMPERA-
TURES AND PRESSURES
•
Do not bend high-pressure hoses or rub them with sharp or abrasive objects.
Do not use bent or cracked pipes or hoses that were previously rejected because of leaks or fastening defects,
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.
;;;;;;
;;;;;;
;;;;;;
;;;;
;;;;
;;;;
RWA01480
DANGEROUS!
RWA01580
CORRECT
•
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 service or inspect the hydraulic circuit, it is ad-
visable to lower the equipment to the ground and completely re-
lease 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 struck by a jet of high-pressure oil or are injured, even
if slightly, immediately consult a doctor.
RWA00990
•
When the machine is stopped at the end of operations, the en-
gine coolant, the oil and all the components are hot and the hy-
dralic 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 the maintenance opera-
tions in accordance with the procedures indicated in the rele-
vant sections of this manual.