Komatsu PC290LC-6K Operation & Maintenance Manual page 25

WARNING: Failure to follow these safety
precautions may lead to a serious accident.
DO NOT HIT WORK EQUIPMENT
• When working in places where there are height limits, such as in tunnels, under bridges, under electric
cables, or in garages, be extremely careful not to hit the boom or arm.
ENSURE GOOD VISIBILITY
• When working in dark places, install working lamps and head lamps, and set up lighting in the work area if necessary.
• Stop operations if the visibility is poor, such as in mist, snow, or rain, and wait for the weather to improve to
a condition that allows the operation to be carried out safely.
OPERATE CAREFULLY ON SNOW
• When working on snow or icy roads, even a slight slope may cause the machine to slip to the side, so
always travel at low speed and avoid sudden starting, stopping, or turning.
• When there has been heavy snow, the road shoulder and objects placed beside the road are buried in the
snow and cannot be seen, so always carry out snow-clearing operations carefully.
WORKING ON LOOSE GROUND
• Avoid operating your machine too close to the edge of cliffs, overhangs, and deep ditches. If these areas
collapse, your machine could fall or tip over and result in serious injury or death. Remember that the soil
after heavy rain or blasting is weakened in these areas.
• Earth laid on the ground and the soil near ditches are loose. They can collapse under the weight or vibration
of your machine.
• Install the HEAD GUARD (FOPS) if working in areas where there is danger of falling rocks and dirt.
TWO PIECE BOOM
• Positioner cylinder rod and boom rod being extended and bucket being retracted, pay utmost attention to
base boom lifting since, after a short run, the bucket reaches the cab area and, consequently, danger of
collision becomes possible.
• Do not operate the control levers suddenly.
• Do not start or stop the swing suddenly.
• Do not use the swing force for hitting operations.
CHECK BEFORE STARTING
Always carry out the following inspection and maintenance before starting work each day.
1. Greasing
• For location of the grease points on first and second booms refer to page 1-6.
• Supply grease to the greasing points shown in the diagram below (total: 16 places).
2. Check for cracks, furrows in the base metal.
Arm Cylinder (1 place)
3 places (for A, B, C)
Bucket Cylinder
(2 places)
7. PRECAUTIONS DURING OPERATION
Boom cylinders (2 places: for D, E)
Boom Cylinder (2 places)
Backhoe bucket and link (3 places)
Positioning cylinder (1 place)
Boom foot (2 places)
1-13