Inspection checks before going into operation
© 2008 HIRSCHMANN Automation and Control GmbH · Branch Office Ettlingen · eMail: [email protected] · www.hirschmann-usa.com
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50 650 19 0201e_Rev C (LinkBelt278).doc / 2008-08-18 / Rev. C / rk
5.
PRE-OPERATIONAL INSPECTION
Prior to operating the crane, the following electrical connections must be checked to ensure that
the LMI system is properly connected for the crane configuration.
•
Cranes with only a main hoist
If the crane works only with the boom and without boom extension or lattice extension, no additional con-
nections are necessary. It must however be ensured that the lifting limit switch weight is correctly mounted
on the main boom hoist rope. With even numbers of rope lines, the lifting limit switch weight shall be at-
tached to the "dead end" of the hoist rope. With odd numbers of rope lines, the lifting limit switch weight
shall be attached to the rope line with the lowest operating speed.
If the crane works with a main boom extension or top section, the connecting cable must be mounted
between the distributor socket on the lattice extension and the distributor socket on the main boom. The
weight of the hoist limit switch of the main boom must be disconnected and mounted on the hoist limit
switch of the extension or of the jib.
Failure to reposition the hoist limit switch weight will prevent the hoist limit switch
system from functioning properly. No weight shall be mounted on the hoist limit switch
of the main boom when working with the extension/top section.
•
Machines with Main and Auxiliary Hoists
If the main boom extension or the top section is not used, then the bridging plug must be plugged into the
distributor socket on the main boom and the lifting limit switch weight must be mounted on the main boom.
If the crane works with a main boom extension and/or with a lattice extension, then the connecting cable
must be mounted between the distributor socket on the extension or on the top section and the distributor
socket on the main boom. In addition, weights must be fitted to both the hoist limit switch of the main
boom and the extension or the top section.
If the boom extension or the lattice extension are in working position and if the main boom is not equipped
with a hoist rope, then the weight of the hoist limit switch on the main boom must be removed in order to
prevent endangerment to personnel or damage to the equipment.
After the electrical connections have been checked to ensure that the system is properly connected for
the respective crane configuration, the following checks must be made:
1. Check the electrical wiring connecting the various parts of the system for physical damage.
2. Check the hoist limit switches and hoist limit weights for free movement.
3. Inspection of the spring cable drum for smooth running, initial drum tension and correct winding of the
cable.
4. Inspection of the mechanical and electrical installation of power measurement sockets on the lattice
extensions (if present).
