Komatsu PC290LC-6K Operation & Maintenance Manual page 149

Hydraulic excavator
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Warning tag:
Attach the warning tag to the starting switch or other appropriate control lever to avoid someone who is not aware
of the circumstances from starting the engine.
Obey precautions:
During the operation, always obey the precautions on the safety label attached to the machine.
Welding instructions:
Turn off the engine starting switch.
Do not apply more than 200 V continuously.
Connect grounding the cable within 1 m from the area to be welded.
Avoid seals or bearings from being between the area to be welded and the position of grounding point
Do not use the area around the work equipment pins or the hydraulic cylinders as the grounding point.
Fire prevention
Use non-flammable cleaner or light oil for cleaning parts. Keep flame or cigarette light away from light oil.
Clamp faces:
When O-rings or gaskets are removed, clean the clamp faces and replace the 0-rings and gaskets with new ones.
Be sure to fit 0-rings and gaskets when assembling.
Objects in your pockets:
Keep your pockets free of loose objects which can fall out and drop into the machinery; especially when you work
on the machinery while bending over it.
Checking undercarriage:
When working in rocky areas, check for damage to the undercarriage and for looseness, flaws, wear and damage
in bolts and nuts. Loosen the track tension a little when working in such areas.
Precautions when washing machine:
Never spray steam or water directly on the connectors and mechatronics parts.
Do not allow water to get on the monitors and controllers inside the operator's cab.
Never spray steam or water directly at the radiator or oil cooler portions.
17. GUIDES TO MAINTENANCE
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