Komatsu PC210-10 DEMOLITION BASE SPEC., Operation & Maintenance Manual, Page: 67 / 458

SAFETY PRECAUTIONS FOR MAINTENANCE
2–49
HIGH-PRESSURE OIL
HIGH-PRESSURE OIL:ALL-0000-2AMK00A
The hydraulic system is always under internal pressure. In addition, the fuel piping is also under internal pressure
when the engine is running and immediately after the engine is stopped. When carrying out inspection or replace-
ment of the piping or hoses, check that the internal pressure in the circuit has been released. If this is not done, it
may lead to serious personal injury or death. Always do as follows.
q
Do not carry out inspection or replacement work with the circuit under pressure.
Always release the pressure before starting. For details, see "METHOD OF RELEASING PRESSURE IN
HYDRAULIC CIRCUIT (4-69)".
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 protective eyeglasses and leather gloves.
q
There is a hazard that high-pressure oil leaking from small
holes may penetrate your skin or cause loss of sight if it
contacts your skin or 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.
HIGH-PRESSURE FUEL
High-pressure fuel:ALL-AD02-2AHK00A
When the engine is running, high-pressure is generated in the engine fuel piping. If you try to disassemble the pip-
ing before the internal pressure is released, serious personal injury can result. When carrying out inspection or
maintenance of the fuel piping system, stop the engine and wait for at least 30 seconds to allow the internal pres-
sure to go down before starting the operation.
HIGH-PRESSURE HOSES AND PIPING
High-pressure hoses and pipings:ALL-0000-2ANK00A
q
If oil or fuel leaks from high-pressure hoses or piping, it may cause fire or misoperation, and lead to serious
personal injury, or death. If the hose or piping mounts are loose or oil or fuel is found to be leaking from the
mount, stop operations and tighten to the specified torque.
If any damaged or deformed hoses or piping are found, please consult your Komatsu distributor.
Replace the hose if any of the following problems are found.
q
Damaged hose or deformed hydraulic fitting.
q
Frayed or cut covering or exposed reinforcement wire layer.
q
Covering swollen in places.
q
Twisted or crushed movable portion.
q
Foreign material embedded in covering.
HIGH VOLTAGE
HIGH VOLTAGE:ALL-0000-2APK00A
When the engine is running and immediately after it is stopped,
high voltage is generated inside the engine controller and the
engine injector, and there is danger of electrocution. Never
touch the inside of the controller or the engine injector portion.
If it is necessary to touch the inside of the controller or the
engine injector portion, please contact your Komatsu distribu-
tor.