Komatsu PC210-11, Operation & Maintenance Manual

Page: 66 / 522

PRECAUTIONS WHEN WORKING UNDER MACHINE OR WORK EQUIPMENT
Machine or work equipment may fall, and it is dangerous that serious personal injury or death may occur. Al-
ways observe the following.
• Make sure the hoists or hydraulic jacks you use are in good condition and strong enough to handle the
weight of the component. Never use hydraulic jacks at places where the machine is damaged, bent, or
twisted. Never use if the element wire of wire rope is frayed, twisted or pinched. Never use bent or distorted
hooks.
• It is extremely dangerous to work under the machine if the
track shoes are lifted off the ground and the machine is
supported only with the work equipment. If any of the con-
trol levers is touched by accident, or there is damage oc-
curring to the hydraulic piping, the work equipment or the
machine will suddenly fall. Never work under the work
equipment or the machine.
• If it is necessary to raise the work equipment or the ma-
chine and then go under it to perform inspection or mainte-
nance, support the work equipment and machine securely
with blocks and stands strong enough to support the
weight of the work equipment and machine.
If the work equipment and machine are not supported, they may come down and it may cause serious per-
sonal injury or death.
• Never use concrete blocks for supports. Concrete blocks may break under even light loads.
USE PROPER TOOLS
Use the tools suited to the task and use them correctly. Using
damaged, deformed, or low quality tools, or making improper
use of the tools may cause serious personal injury or death.
PRECAUTIONS FOR CHECK AND MAINTENANCE
TURN BATTERY DISCONNECT SWITCH TO OFF POSITION
In the following cases, turn the starting switch to OFF position and check that the system operating lamp is off.
Then set the battery disconnect switch to OFF position and remove the switch key.
If you check and handle battery without turning battery disconnect switch to OFF position, serious personal in-
jury or death by such as an electric shock may occur.
• When storing the machine for a long time (more than 1 month)
• When repairing the electrical system
• When performing electric welding
• When handling the battery
• When replacing the fuse, etc.
PRECAUTIONS FOR WELDING
Welding operations must always be performed by a qualified welder and in a place equipped with proper equip-
ment. There is a hazard of gas, fire, or electric shock when performing welding, so never allow any unqualified
person to perform welding.
,&
,&
PRECAUTIONS FOR MAINTENANCE SAFETY
2-42