18 MANUAL EXTENSIONS
18.1 Generality
These are ad di tio nal extensions, which are placed in the hydraulic extensions of
the crane and of the hydraulic jib and secured by locking pins.
Manual extensions have a maximum capacity independent from the crane confi-
guration as shown on the capacity plates.
(!)
ATTENTION
(!)
Manual extensions can be extracted from the rest position and be opera-
tive, once the security pins have been removed, with the outer boom in
sliding position.
(!)
ATTENTION
(!)
- Do not stand in front of stabilisers during operation!
Operate from a lateral position in respect of the extension movement of
the manual extensions; operation from the frontal position is dangerous.
- Verify that the area is suitable for this operation and there are no unautho-
rized persons in the working area.
- Do not permit the extension to slide out at speed as this will damage the
stroke end stops.
- Do not try to align the holes (slots) for the locking pins with your fin-
gers; always use a suitable tool.
- When manual extensions are in place, fit the locking pins and secure
them with the check pins to prevent accidental escape.
(!) ATTENTION (!)
Always remember that when operating with implements, their tare weight must
be deducted from the capacity of the crane.
18.2 Lifting moment limiting device “ELECTRONIC” for the
manual extensions (see Chapter 16.7)
This procedure aims to calculate the weight applied on the manual extensions.
It is necessary to apply the same procedure EVERY TIME you use the manual
extensions.
For its correct execution, follow meticulously the instructions reported HERE.
The extension limiting device IS NOT ALWAYS ACTIVE; on the contrary of
the crane limiting device, it responds about lifting a load only if QUESTIONED,
therefore only if you enable the procedure. Remember that the procedure is
manual. In any case always refer to the capacity plates of the crane.
The limiting device for manual extensions, when interrogated, compares the
real weight applied on the lifting hook (inclusive of all the accessories attached)
with the value reported on the capacity plates. Such evaluation is effective only
during the execution of the procedure, therefore it is prohibited to add weight or
replace loads after the procedure is completed; in such case the procedure shall
be executed again from the start.
In the case one or more manual extensions are added or removed with respect
to the initial installation, it is COMPULSORY to have the crane initial configura-
tion file modified accordingly (See Authorised Shops).
Before activating the procedure, extend and lock by a pin not only the manual
extension you intend to use but also the preceding ones.
The instructions for the correct execution of the procedure of manual exten-
scions weight control are in the paragraph “Setting Menù”.
18
USE OF IMPLEMENTS
GR4_5 - EVOLUTION
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