Appendix: Important notes for crane operators and crane operating companies
© 2009 Hirschmann Automation and Control GmbH · Branch Office Ettlingen · eMail: [email protected] · www.hirschmann.com
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24 183 19 1012e (Generic) / 2009-02-26 / Rev. 01 / rk.
5. The overload protection fitted (overload cut-out) must be adjusted to the altered carrying capacity or load moment range
by the crane driver when the crane is adjusted to different operating situations, e.g.:
a) when the support is extended and retracted (switch to the large or small load moment)
b) when the boom length changes due to:
manual extension and retraction (telescoping)
fitting and removal of connectors
c) when turning or slewing the crane in the area of the larger or smaller standing moment (switching to the large or small
load moment)
d) when transferring to another carrying capacity range by multiple cutting-in of the cable lines of the lifting gear or boom
retraction device.
6. It must be expressly stated that incorrect use of the crane can render the overload protection ineffective or can result in
the drive gear not cutting out sufficiently quickly. In this case, accidents cannot be completely ruled out despite an
overload protection being fitted. This applies, for example, for:
- under-hooking of the load or load suspension gear
- excessive forces of inertia
- loads falling into the cable
- diagonal pull
- crane travel in an area of heavily sloping ground
- soft subsoil
wind loading.
7. If a device for switching off or bypassing the overload protection (load moment limiter) is fitted, then it may only be used
subject to special precautions in the presence of the crane supervisor, e.g. when testing the crane, and in the situations
of use specified by the crane manufacturer.
Careful compliance with the provisions contained in this notice and in the crane manufacturer’s
directions for use is the prerequisite for the safe operation of the overload protection (overload cut-out).
In the event of any doubt, the manufacturer’s instructions for use are to be consulted. If this is not
sufficient, the relevant company should be consulted.
Unauthorised interventions in the mechanism of the overload protection invalidate any claims under the
warranty.
Publisher:
VDMA Fachgemeinschaft für Hebezeuge und Fördermittel
im Verein Deutscher Maschinenbau-Anstalten e.V.
Düsseldorf-Oberkassel