M A I N T E N A NC E
Page 51
Note:
If the chain jams in the hoist and can no longer
be run out, the gearbox must be dismantled. The gear-
box retaining bolts must be removed for this purpose,
and the end chain link pin must be pulled out. The
chain wiper must then be removed. The gearbox can
now be pulled approx. 15 mm from the centre section.
In this position, the safety ring, item 440 (gearbox
3 TI/6 TI), item 500 (gearbox 10 TI/16 TI) see E-list,
gearbox) in the vicinity of one of the exhaust air gui-
des. The gearbox housing can then be removed and the
gearbox can be dismantled down to the sprocket wheel.
When removing the old chain, assembly chains
(1)
are
brought into position on all the deflection sprockets
(see also section
"Removing and installing load slee-
ve, bottom block, clamp and buffer"
) and section
"Removing and installing chain"
).
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 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. The welds of the chain links which lie flat in
the drive sprocket
(5)
must face towards the gearbox in
the case of treble fall hoists. (See illustration).
Switch the hoist to the "lower" rotational direction and
detach the assembly chain from the chain after it comes
out of the centre section.
Depending on the number of chains of hoist, after
alignment, the new chain is pulled over the deflection
sprocket of the bottom block and if necessary over the
deflection sprocket of the centre section by means of
further assembly chains.
Note:
If the chain link on the idle chain side is positio-
ned 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 according to
section
"Removing and installing load sleeve, bottom
block, clamp and buffer"
and section
"Removing and
installing chain"
.
Drawing in the chain
2
1
3
4
5
R E P L AC I N G C H A I N A N D C H A I N S P RO C K E T
