Komatsu PC118MR-8 Operation And Maintenance Manual page 80

SAFETY MAINTENANCE INFORMATION
SAFETY RULES FOR HIGH-PRESSURE OIL
The hydraulic system is always under internal pressure. When inspecting or replacing piping or hoses, always
check that the pressure in the hydraulic circuit has been released. If the circuit is still under pressure, it will lead to
serious personal injury. Always do as follows.
q Always release the pressure before starting any inspection or replacement operation.
q If there is any leakage from the piping or hoses, the surrounding area will be wet, so check for cracks in the
piping and hoses and for swelling in the hoses.
When carry out inspection, wear safety glasses and leather gloves.
q There is a hazard that high-pressure oil leaking from small
holes may penetrate your skin or cause blindness if it
contacts your eyes directly. If you are hit by a jet of high-
pressure oil and suffer injury to your skin or eyes, wash the
place with clean water, and consult a doctor immediately
for medical attention.
SAFETY HANDLING HIGH-PRESSURE HOSES
q If oil or fuel leaks from high-pressure hoses, it may cause fire or defective operation, which may lead to serious
injury. If any loose bolts are found, stop work and tighten to the specified torque. If any damaged hoses are
found, stop operations immediately and contact your Komatsu distributor.
Replace the hose if any of the following problems are found.
q Damaged hose, deformed mouthpiece, damaged O-ring
q Frayed or cut covering or exposed reinforcement wire layer
q Covering swollen in places
q Twisted or crushed movable portion of hose
q Foreign material stuck to covering
PRECAUTIONS FOR MAINTENANCE OPERATIONS AT HIGH TEMPERATURES AND
HIGH PRESSURE
q When the machine is stopped at the end of operations, 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
engine 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
m a i n t e n a n c e o p e r a t i o n s i n a c c o r d a n c e w i t h t h e
procedures indicated in the relevant sections of this
manual.
WASTE MATERIALS
To prevent pollution, pay careful attention to the method of disposing of waste materials.
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SAFETY
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