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SAFETY
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 injury, so always do as follows.
Release the pressure in the hydraulic circuit. For details, see "METHOD OF RELEASING PRESSURE IN
HYDRAULIC CIRCUIT (PAGE 4-74)". Do not carry out any inspection or replacement work when the hydraulic
system is under pressure.
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.
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.
PRECAUTION FOR HIGH FUEL PRESSURE
High pressure is generated inside the engine fuel piping when the engine is running. When carrying out inspection
or maintenance of the fuel piping system, wait for at least 30 seconds after stopping the engine to let the internal
pressure go down before starting inspection or maintenance.
SAFETY HANDLING HIGH-PRESSURE HOSES
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.
Damaged or leaking hydraulic fitting.
Frayed or cut covering or exposed reinforcement wire layer.
Covering swollen in places.
Twisted or crushed movable portion.
Foreign material embedded in covering.
PRECAUTION FOR HIGH VOLTAGE
When the engine is running or immediately after it has stopped,
high voltage is generated at the injector terminal and inside the
engine controller, so there is danger of electrocution. Never touch
the injector terminal or the inside of the engine controller.
If it is necessary to touch the injector terminal or the inside of the
engine controller, please contact your Komatsu distributor.
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