DANGER
Risk of physical injury
If the emergency lowering function has to be used
because the operator has fallen unconscious, make
sure that all parts of the operator’s body are fully
within the driver's cab so that there is therefore no
risk he may be injured during the lowering procedure.
The operator of the emergency lowering valve must
be certain that the moving components of the lift
mast are immediately set in motion on opening the
valve. Special attention must be given to the cab, the
chains and the inner masts of the lift mast. All of the
load chains in the lift mast must remain taut through-
out the whole of the lowering procedure. If the com-
ponents of the lift mast are not immediately set in
motion after opening the emergency lowering valve,
close the valve immediately.
If the view that the operator of the emergency lower-
ing valve has of the lift mast is obstructed, a third
person with full view of the lift mast must be involved.
This third person must be able to communicate clear-
ly with both the operator of the emergency lowering
valve and the operator of the industrial truck.
If a movement like the one described cannot be de-
tected immediately or if one of the chains has slack-
ened, a mechanical jam at the lift mast is suspected.
The emergency lowering procedure must then be
stopped immediately by closing the emergency low-
ering valve. The operator must then be retrieved
some other way. For example, a second turret truck
could be used if suitable, or an elevating work plat-
form. The authorised customer service team must
determine the cause of the fault and the means of
rectifying it.
If, as described above, it is suspected that the lift
mast is mechanically jammed, the abseil system
must not be used. The resulting vibrations could
cause the mechanical jam to be released, which
could create a further hazard should the cab subse-
quently drop.
– Apart from the emergency lowering valve, it is not
permitted to adjust any other screw.
– Close the valve again once the emergency lower-
ing process has been fully completed.
Operation
4
Emergency operation
84 5231 804 2502 EN - 04/2020
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