Note:
If the chain jams in the hoist and can no longer
be run out, the gearbox must be dismantled (see spare
parts list for “Gearbox”).
For dual chain hoists, when removing the old chain, an
assembly chain
1
is brought into position on the
deflection sprocket of the bottom block by means of an
open chain link (see also
Removing and installing
load sleeve, bottom block, clamp and buffer
section
and
Removing and installing chain
section).
Following replacement of the chain sprocket (see spare
parts list) an assembly chain
2
is run carefully – with
low air pressure – over the drive sprocket.
Fasten the new chain
5
to the assembly chain on the
drive sprocket by means of one or two open links
3
to
the idle chain side. The first chain link
4
must run
upright over the drive sprocket with the weld facing
outwards.
Switch the hoist to the “lower” rotational direction and
detach the assembly chain from the chain after it comes
out of the centre section.
For dual chain hoists, the new chain, after it has been
aligned, is pulled over the deflection sprocket of the
bottom block using the assembly chain.
Note:
If the chain link on the idle chain side is
positioned incorrectly, it must be removed, the
following chain link will be positioned correctly.
Fastening of the chains and installation of the load
sleeve, clamp, buffer and buffer discs is carried out in
accordance with the
Removing and installing load
sleeve, bottom block, clamp and buffer
section and
the
Removing and installing chain
section.
The PROFI 1.5 TI and 3 TI/2 hoists are equipped with a
new type of safety clutch as standard. This prevents
loads exceeding the limit values set from being lifted.
The limit value is set so that loads of 125 % of the load
carrying capacity cannot be lifted. 110 % can be lifted
in order to perform the dynamic overload test.
AT T E N T I O N !
The safety clutch must only be engaged for a
short time in order to prevent unnecessary
wear and overheating of the drive.
When the safety clutch is activated, the hoist should be
unloaded by switching to a lowering movement.
O V E R L OA D P RO T E C T I O N
Drawing in the chain
REPL ACING CHAIN AND CHAIN SPROCKET
powered by air !
M A I N T E N A NC E
Page 59
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