INSTALLATION, USE AND MAINTENANCE
GBA-GBP-CBE-MBE SERIES
68
6.3.3 Test of part and component efficiency
The following instructions should be scrupulously complied with for the single parts of
the jib crane:
Annual test of the efficiency of the structural elements, welding, pins and
bolted joints (fig. 97):
•
The metallic structure of the jib crane, in addition to normal alterations due to environmental factors
and wear of moving parts, may be subject, including unexpectedly or during handling operating
phases, to collisions, contacts or scraping with other equipment or abnormal stress that can damage
the metalwork frames, welding and pins. Therefore, the structures, after perfect cleaning, must
periodically undergo scrupulous tests to check their suitability and repair any damage if necessary.
•
The brackets composed of plates and pin, that form the hinged parts are subject to wear since they
are mobile and swinging parts subject to radiating friction in the contact area. Replace them if any
excessive wear is found when they are checked.
•
All of the grub screws, high resistance pins and pins must be disassembled and carefully checked
along with their seats on an annual basis.
•
Make sure the locking torque of the bolts fixing the column or shelf is in accordance with the required
torques.
Repair the hinged structures and parts or replace them if the following occurs:
•
deformations:
lengthening, crushing, dents, bends
•
wear:
worn parts, reduction in cross section, incisions, abrasions, corrosion,
oxidation, scratches, peeling paint
•
breakages:
cracks in the welding, bending, cuts or incisions, broken parts
•
changes in cross section
of 10%, or diameter or thickness
of 5%
compared to the initial values
fig. 97
