Komatsu Utility WB97S-5, Operation & Maintenance Manual

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PRECAUTIONS TO BE TAKEN DURING MAINTENANCE
58
2.8.15 HANDLING HIGH-PRESSURE PIPES
q
Do not bend high-pressure pipes or rub them with sharp or abrasive objects.
Do not use any bent or cracked pipes or hoses that were previously rejected because of leaks or fastening
defects, since they may burst during use.
q
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
WORKING ON HIGH- PRESSURE
SYSTEMS
q
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 service or inspect the hydraulic circuit, it is
advisable to lower the equipment to the ground and completely
release the pressure and also the residual pressure present in
the tank.
For this reason, always wear goggles and thick gloves during
the inspections and use a piece of cardboard or a sheet of
plywood to check for oil leakages.
Small leakages from pipes under pressure and the resulting jets
are extremely dangerous, since they can perforate the skin and
get in the blood circulation or injure the eyes.
If you are struck by a jet of high-pressure oil or are injured, even
if slightly, consult a doctor without delay.
2.8.17 PRECAUTIONS FOR MAINTENANCE
WORK INVOLVING HIGH
TEMPERATURES AND PRESSURES
q
When the machine is stopped at the end of operations, the
engine coolant, the oil and all the components are hot and the
hydraulic circuits are under pressure.
In these conditions, if the coolant, the hydraulic oil or the engine
oil are to be drained in order to change them or the filters, there
are serious risks of injury and burns.
Wait for the temperature to lower within the normal operating
range (40–45 °C) before carrying out the maintenance
operations in accordance with the procedures indicated in the
relevant sections of this manual.
RWA01480
DANGEROUS!
RWA01580
CORRECT
RWA00990
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