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SAFETY
PRECAUTIONS FOR MAINTENANCE
HANDLING ACCUMULATOR
This machine is equipped with an accumulator. For a short time after the engine is stopped, if the work equipment
control lever is moved to the LOWER position, the work equipment will move down under its own weight.
After stopping the engine, always set the safety lock lever to the LOCK position.
When releasing the pressure in the work equipment circuit on machines equipped with an accumulator, carry out
the procedure in accordance with the method for handling the accumulator.
Method of releasing pressure: See "METHOD OF RELEASING PRESSURE IN OPERATING CIRCUIT ON
MACHINE EQUIPPED WITH ACCUMULATOR (PAGE 3-66)".
The accumulator is filled with high-pressure nitrogen gas, and it is extremely dangerous if it is handled in the
wrong way. Always observe the following precautions.
Never make any hole in the accumulator or expose it to flame or fire
Do not weld any boss to the accumulator.
When disposing of the accumulator, it is necessary to release the gas from the accumulator. A special air
bleed valve is necessary for this operation, please contact your Komatsu distributor.
PERSONNAL
Only authorized personnel can service and repair the machine. Do not allow unauthorized personnel into the area.
If necessary, employ an observer.
ATTACHMENTS
Appoint a leader before starting removal or installation
operations for attachments.
Place attachments that have been removed from the machine in
a stable condition so that they do not fall. And take steps to
prevent unauthorized persons from entering the storage area.
WORK UNDER THE MACHINE
If it is necessary to go under the work equipment or the machine
to carry out service and maintenance, support the work
equipment and machine securely with blocks and stands strong
enough to support the weight of the work equipment and
machine.
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 control levers is
touched by accident, or there is damage occurring to the
hydraulic piping, the work equipment or the machine will
suddenly drop. This is extremely dangerous. Never work under
the work equipment or the machine.
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