H2.4 EMERGENCY exclusion screw of the lifting moment
limiting device (crane with standard distributor)
Firstly remove the protection guard. Then unscrew the fixing screws (13 mm hexagonal
spanner).
The electro-valve is installed with an exclusion screw which must only be used in
case of emergency, testing or other abnormal situations when it is not possible to
carry out any of the movements allowed by the limiting device (This may occur when
the extension booms are fully folded and the load is particularly heavy and bulky).
Only in these situations it is permitted to remove the lead seal; slacken the lock nut
of the screw fig. 23 (14 mm hexagonal spanner), tighten the screw (without forcing)
(5 mm allen key) and re-tighten the lock nut.
H2.5 EMERGENCY tap lever of the lifting moment
limiting device (crane with Danfoss distributor)
Firstly remove the protection guard. Then unscrew the fixing screws (13 mm hexago-
nal spanner). Fig. 24
Each device is fitted with an emergency tap lever (fig. 24) to be used in the event of
a black-out, electrical or hydraulic malfunctions or whenever the lifting moment limi-
ting device makes it impossible to use any controls when handling a load (this may
occur when the extension booms are fully folded and the load is particularly heavy
and bulky).
Only In these situations it is permitted to remove the lead seal placed on the tap
lever and place it in the closed position.
(!) ATTENTION (!)
Activation of the exclusion device or of the emergency tap lever.
When the operator uses this device, it means that he wishes to override the lifting
moment lifting device in order to make some manoeuvres (which would be
impossible with the device active) that bring the moment to within the maximum
level, but involve an overload condition. In such an emergency condition (where
the lifting moment limiting device has been disabled), the operator, who is the
main responsible for the machine safety, must:
- carefully consider the manoeuvres required to return to normal working
conditions;
- calmly and carefully assess the type and scale of the hazards arising from these
manoeuvres and the possible reaction of the crane (tipping over, frame overload,
uncontrolled fall of the load due to a hydraulic system overload etc.);
- make all movements as slowly as possible to reduce the dynamic overload
to the minimum.
After such emergency operations and prior to re-use of the crane, you must immediately
go to FASSI authorised Center for testing the structure and re-sealing of the device.
(!) Interferences with the valves or removal of the lead seal release the
FASSI GRU IDRAULICHE
from any responsibility and invalidate the warranty.
(!) ATTENTION (!)
The presence of the lifting moment limiting device does not release the user from
the obligation to respect what is indicated on capacity plates and lifting curves.
(!) ATTENTION (!)
Always check carefully that the vehicle is perfectly stable, paying special attention
to the area immediately in front of the driver’s cabin is usually less stable.
(!) ATTENTION (!)
Do not walk on the lever guards of the lifting moment limiting device positioned on
the distributors or electric control panels. DE1679
Do not use water to estinguish fire! DE1680
H2.5
CONTROLS TO
OPERATE THE CRANE
F 170A
31
fig. 23
DE1679
DE1680
fig. 24
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