ISO 9927-3:2019 pdf download – Cranes – Inspections
1 Scope
This document specifies the regular inspections to be carried out on tower cranes.It does not cover inspection prior to the first use of a tower crane.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4309, Cranes — Wire ropes — Care and maintenance, inspection and discard
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 General
In order to ensure safe operation of tower cranes, their proper working and operational condition shall be maintained. Therefore, all cranes need to undergo regular inspections. This ensures that deviations from safe conditions are detected and can be rectified. The inspections shall be arranged.
The regular inspections are:
— daily inspections;
— frequent inspections;
— periodic inspections; and
— thorough inspections.
Inspections (periodicity, content, persons in charge, results and reports) shall be in accordance with Clauses 5 to 9 and Table A.1 which provides an overview of the inspections.
NOTE The manufacturer can give inspection instructions that differ from those of this document. In this case, the manufacturer’s instructions are applicable.
5 Daily inspections
5.1 General
Daily inspection shall be performed before starting. This inspection shall consist of a visual inspection
(in general, no dismantling is required) and functional tests as defined hereafter.
They shall be carried out by a competent person (e.g. the crane operator).
5.2 Content
The inspections before each start shall take in:
a) the functioning of mechanisms, in particular the brakes (generally without load);
b) the functioning of limiting and indicating devices; and
c) observation of conspicuous defects, including ropes.
5.3 Results
Any defect shall be pointed out to a person who can make a suitable decision (to leave the tower crane in use, repair, thorough inspection of a part of the tower crane or the whole tower crane, limitation of use).The causes of these defects shall be investigated, depending on the type of component and defect
concerned.The operator’s log shall be updated (date of the repair, method).
6 Frequent inspections
6.1 General
Any defect shall be pointed out to a person who can make a suitable decision (to leave the tower crane in use, repair, thorough inspection of a part of the tower crane or the whole tower crane, limitation of use).
The causes of these defects shall be investigated, depending on the type of component and defect concerned.
The record book shall be updated (date of the repair, method).
6.2 Items to be inspected
The following items shall be inspected:
a) level of lubricants: leakage of lubricants, greasing;
b) hydraulic equipment: leakage;
c) hooks and latches: visible deformation, cracks, wear;
d) wire ropes: in accordance with ISO 4309;
e) connections, joints: corrosion, visual inspection;
f) break wear: thickness of brake linings, adjustment, noise, etc.;
g) hydraulic and pneumatic hoses: in particular those which are bent during operations;
h) electrical installation: state, signs of deterioration, moisture accumulation;