Komatsu Utility F50003, Operation & Maintenance Manual

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PRECAUTIONS TO BE TAKEN DURING MAINTENANCE
58
2.8.15 HANDLING HIGH-PRESSURE PIPES
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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 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.
2.8.16 PRECAUTIONS TO BE TAKEN
WHEN WORKING ON HIGH- PRES-
SURE SYSTEMS
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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 service or inspect the hydraulic cir-
cuit, it is advisable to lower the equipment to the ground and
completely release the pressure and also the residual pres-
sure present in the tank.
q
For this reason, always wear goggles and thick gloves dur-
ing 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.
q
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 MAINTE-
NANCE WORK INVOLVING HIGH
TEMPERATURES AND PRES-
SURES
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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 en-
gine oil are to be drained in order to change them or the fil-
ters, there are serious risks of injury and burns.
Wait for the temperature to lower within the normal operating
range (40–45) before carrying out the maintenance opera-
tions in accordance with the procedures indicated in the rele-
vant sections of this manual.
RWA01480
DANGEROUS!
RWA01580
CORRECT
RWA00990