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Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500
Coupling for cylindrical or conical shaft extensions with keyways
Fitting and dismantling instructions for horizontal machines having plain or
rolling contact bearings with axial shaft guidance
The detailed instruction for the whole operation are
generally described in the instruction manual of the
coupling, so we suggest to refer to this document.
The main steps of the operation are here described for
information.
Sheet No.
3AAM101031 E
Rev. B
Page 2 of 2
The dismantling operation of a coupling provided for
cylindrical shaft end consists mainly of the following
steps:
-
Place the hydraulic jack between the shaft end
and the coupling (through suitable plate and rods)
to exert an axial force between the shaft end and
the inner surface of the coupling. In other words,
the force generated with the jack must push the
coupling out of the shaft end.
-
Sustain with a suitable crane the weight of the
coupling to avoid that the coupling will load the
shaft end and the fall of the coupling itself.
-
Connect the high-pressure device at the threaded
hole provided for this purpose on the coupling.
-
Inject
the
oil
under
circumferential grooves of the coupling and rise
the pressure of the oil, following the operational
instructions, to the value indicated on the
instruction manual. If the whole system is without
oil leakages, the coupling diameter will gradually
expand, and the oil will come out laterally after
some time (about 15 minutes).
-
Apply with the hydraulic jack the axial force
between the coupling and the shaft end. The force
required for the extraction is normally in the order
of 50 tons.
-
Take off the coupling in one continuous step,
possibly
without
interruption, maintaining a
constant pressure on the oil.
In case of coupling with two or more inner diameter,
refer carefully to the detailed instructions of the
manufacturer.
01.2023
pressure
into
the
Issued by: MOLM
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