Removal Of Bearing; Reassembly - Siemens 1SE0 Operating And Maintenance Manual

Thermoplastic fans have two openings
for the insertion of the puller arms so that
the pulling force can directly act on the
fan hub. On delivery, a film of plastic may
cover these openings and later on they
should be punched.
A suitable device (puller) should be used
for pulling the fan off and pressing it back
on. Hammer blows must be avoided to
protect the fan and bearings.
Cast Iron fan
Cast iron fans are axial locked with separate
circlip. Cast iron fans are best removed by
engaging the puller arms on the outer rim
of the fan. In case of larger fans, the puller
holes provided on the hub can be used.
5.2.3 Removal of Bearings
For removing bearings use proper pullers.
Re-usable bearings, which are non-
separable (e.g. Deep groove ball bearing),
should be withdrawn by attaching puller
arms to the inner ring of the bearing. If it
is a must to apply puller arms on the outer
ring of the bearing, the bearing should be
rotated during withdrawal to avoid damage
to the bearing.
Caution
(Environmental Protection)
Waste grease & greased cloth - to be
collected as hazardous waste and sent
to hazardous waste disposal facility for
incineration.
Removal of bearings or inner rings which
are not to be used is fascilitated by heating
them with gas or welding torch.
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5.3 Re-assembly
The motor must be assembled in a dust
free, dry and clean location.
As the motor conforms to the type of
protection IP55, all machined mating
surfaces are provided with a thin even coat
of bearing grease. Provide a fresh coat of
this grease at the time of re-assembly.
Unmatched surfaces are provided with
rubber gaskets. At the time of re-assembly,
ensure that the gaskets are in good
condition. Place the gaskets carefully to
achieve the correct sealing. Replace the
gaskets with the new ones if the same are
damaged.
All fasteners that are used on the exterior
of the motor are provided with a coat of
bearing grease to prevent ingress of water
and dust through tapped holes. Ensure
that the same is provided at the time of
re-assembly.
Do not interchange location (DE & NDE) of
bearing covers, as the spigot dimensions
may be different.
A bearing must be replaced if it is
damaged. Damage to bearing is often
difficult to recognize; in doubtful cases,
replace the bearing. Bearings, which
have been removed, should be reused
only if they show no trace of damage and
provided they are thoroughly cleaned
beforehand.
Clean bearings using proper cleaning agent
like White spirit. It is advisable to wear
gloves.
Caution
The cleaned bearing must be free of
foreign bodies (fibres from cleaning
rags, hair from brushes, etc.)