∎ Do not continue to hammer for more than one minute.
When rocks are not broken after more than one minute’s hammering at the same point, change
the place to be hammered. Extended hammering at the same place causes the chisel to wear out
excessively.
∎ Do not move rocks.
Avoid moving rocks with the side of the bracket, because it is the major factor that causes
broken bolts installed on the bracket, chisel and will damage the boom and the arm.
∎ Do not use chisel as a lever.
When breaking rocks by using chisel as a lever, bolts and chisel may be broken, too.
Summary of Contents for 1000M
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