8. Lifting hook
L4.3 Manoeuvres to unfold the jib in working condition
Operate as described to put the crane in working condition (paragraph H0.1).
By operating the corresponding levers:
- open the outer boom of the jib;
- extend the jib outer boom sliding sections;
- position the hook on the centerline of the load.
L4.4 Manoeuvres to fold the jib in rest condition
By operating the corresponding levers:
- re-enter the hydraulic sections of the jib and of the crane;
- lift the inner boom to its stroke end;
- re-enter the outer boom of the jib and of the crane to its stroke end;
- operate, as described, to fold the crane in rest position.
L4.5 Operations to remove the hydraulic jib from the crane
By operating the corresponding levers:
- re-enter the jib outer booms sliding sections to their stroke end;
- extend the crane outer ram to its stroke end;
- extend (of at least 1 - 1,5 m) the crane outer booms sliding sections;
- re-enter the outer ram of the jib and the inner ram of the crane to obtain
the two rest brackets of the jib, either lay on the ground, or on the truck
body or, if possible, on a specific rest trestle;
- remove screwing the locking pins;
- re-enter the outer booms sliding sections of the crane to free the first
boom of the crane jib;
- disconnect the jib from the hydraulic circuit of the crane operating on the
quick couplings.
(!) Assure that the hydraulic jib is adequately stripped to avoid side turnover.
L4.6 Operations to mount the hydraulic jib on the crane
By operating the corresponding levers:
- place the extension on the vehicle or on the ground in the direction of the
movement of the extension booms;
- extend the crane outer ram to its stroke end and position the extension
booms of the crane not too close to the first boom of the jib in order to allow
the lining-up manoeuvres and the connection of the hoses;
- connect the jib hoses to the hydraulic plant through coupling unions, following
indications of Paragraph L0.1, Hydraulic connections for implements - supple-
mentary hoses;
- operate the outer ram of the jib and the inner ram of the crane in order to align
the extension booms of the crane and the first boom of the jib thus allowing their
connection;
- eventually repeat the previous operation until the fixing holes are aligned,
working on the extension booms of the crane;
- insert the lock pin into the fixing holes and secure it with the check pin.
L4.3
USE OF IMPLEMENTS
F 170A
37
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