General; Dismantling; Pressing On And Pulling Off Drive Elements; 5.2.2 Fans - Siemens 1SE0 Operating And Maintenance Manual

Safety Precautions
Warning
Before starting any work on
the motor or other equipment,
particularly before opening covers
over live or moving parts, the motor
must be properly isolated from the
power supply. Besides the main
circuits, any additional or auxiliary
circuits that may be present must
also be isolated.
The "5 Safety rules" to be followed
are:
• Isolate the equipment
• Take effective measures to prevent
reconnection
• Verify equipment is dead
• Ensure proper earthing
connections
• Cover or fence off adjacent live
parts
The precautions listed above should
remain in force until all maintenance
work is finished and the motor has
been fully assembled.
Certain parts of the motor may reach
temperatures above 50°C.
When cleaning the motor with
compressed air, ensure that suitable
exhaustion measures are used and
you use personal protective gear
(goggles, face mask/filter or similar)!
If chemical cleaning agents are used,
observe the instructions and any
warnings.
Chemical agents must be compatible
with the motor's components/parts,
especially when it involves plastics.
5.1

General

Periodic overhauling of the motor is
recommended to ensure long trouble free
service.
Before starting the maintenance work,
make sure that the supply is disconnected.
These motors are provided closely pitched
ribs for effective cooling of the motor.
These ribs should be cleaned at regular
intervals either by oil free compressed air,
or by scraping, depending on the level of
contamination.
The inside of the motor should be cleaned
using dry compressed air during normal
overhauling of the motor. Special care
should be taken while cleaning the
windings to remove loose dust, moisture
etc.
5.2

Dismantling

5.2.1 Pressing on and pulling off drive
elements
Use the tapped hole provided in the end
of the shaft for fitting drive components
such as couplings, gearwheels, belt pulleys
etc. and, if possible, heat the components
as necessary. Use a suitable puller tool for
removing the components. Do not strike
the components, e.g. with a hammer or
similar tool, when fitting or removing them
and do not exert more than the maximum
value of radial or axial force – according
to the catalog – transmitted to the motor
bearings through the shaft extension.

5.2.2 Fans

Plastic fan
Thermo plastic fans have two cast-on tabs
that snap into the ring groove on the shaft
to prevent axial movement. Before the fan
is pulled off the shaft, the two tabs must be
disengaged (lifted up) and held temporarily
in that position, e.g. by inserting packing.
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