J. D. NEUHAUS PROFI 25TI, Original Operation And Assembly Instructions

Page: 53 / 72

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Page 53
MAINTENANCE
- TREBLE CHAIN HOIST (37 TI)
Illustration of a treble chain device
Removal
Move the bottom block as close as possible to the hoist body.
Position the bottom block securely in order to prevent the
chain from unravelling uncontrollably causing the bottom
block to fall.
Remove the bottom block end chain link from the chain mount
on the bottom block; unscrew the M24 self-locking nut from
the headed bolt and remove the headed bolt.
Note: For assembly, it is helpful to work with two short assembly
chains which are fastened by means of an open chain link to the
hoist chain being pulled out during removal of the chain and are
pulled successively over the deflection sprocket of the centre
section and the bottom block. They remain there until assembly
is completed.
Pull the chain from the deflection sprocket of the centre
section and from the bottom block. The buffer, buffer discs
and spacers are thereby pulled from the chain.
Assembly
Push the buffer assembly in the correct alignment (buffer plus
buffer discs, edge encloses buffer) onto the chains.
Align the chain and fasten it to the assembly chain in the
bottom block by means of the open chain link.
Pull the chain through the bottom block and detach the
assembly chain and the open chain link from the chain.
Push the spacer onto the chain.
Align the chain and pull through the centre section by means
of the assembly chain.
Detach the assembly chain and the open chain link from
the chain.
If no assembly chains have been used, the end of the chain
must be inserted into both the bottom block and the centre
section and pulled through by turning the deflection sprockets
using an auxiliary tool.
Push the second spacer onto the chain.
Align the chain and fasten the chain link to the bottom block
by means of the headed bolt (position of the weld must align
with that of the following links).
Fasten headed bolt sufficiently securely with new M24 self-
locking nut. The headed bolt has slight axial play in the bore
of the bottom block.