SAFETY Always start the machine seated in the operators cab using the ignition switch. Never use a welder or a machine with a higher voltage system to jump start the machine. Using a higher voltage to jump-start a machine may damage the machines electrical system or cause an unexpected explosion or fire. Always jump-start a machine with equal voltages. High Pressure Hoses 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.
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.
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 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. 1-42 PC350LL-7E0