GENERAL PRECAUTIONS FOR SAFETY ATTACHMENTS AND OPTIONS
6-2
GENERAL PRECAUTIONS FOR SAFETY 6
When installing attachments or options to the machine, it is necessary to pay attention to safety. Please obey the
following precautions strictly when selecting, installing, or using attachments or options.
HYDRAULIC QUICK COUPLER PIPING 6
WARNING
Quick coupler operation can be dangerous. There is a risk of death to exposed persons. Follow these
instructions strictly.
1. Use only quick couplers which comply with European standard EN474. In particular, it must be possible to
confirm from the operator's position that the locking of the attachment or bucket has been completed.
2. Use only quick couplers which include a pilot operated check valve in the locking cylinder. This is to ensure
that there is no risk of the bucket or attachment coming loose in the case of loss of hydraulic pressure. If in
doubt consult the manufacturer of the quick coupler.
3. Read the instruction manual of the quick coupler carefully and follow the recommendations. If in doubt about
the installation or operation consult your Komatsu dealer.
4. The pressure regulation valve (2) allows the pressure at the quick coupler to be limited according to the quick
coupler manufacturer's recommendation. Check the specification of the quick coupler and ensure that the
valve is set appropriately.
5. Ensure that the quick coupler is installed by a suitably qualified technician. If in doubt contact your Komatsu
dealer.
LOCATIONS 6
2
3
4
1. Switch (See following page) 3. Piping (quick coupler lock direction)
2. Adjustable pressure regulating valve 4. Piping (quick coupler release direction)
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