WARNING
Rotor can fall out
If the motor is in a vertical position, the rotor can fall out while work is being performed on the
locating bearing. This can result in death, serious injury or damage.
● Support or unload the rotor when carrying out work with the machine in a vertical position.
9.4.7 Bearings
Work influencing explosion protection must be carried out by the manufacturer or by a specialist
workshop for electrical machinery authorized by the manufacturer.
See also
Safety instructions for repair work (Page 94)
9.4.7.1 Gamma ring
Depending on the particular version, a Gamma ring is installed as sealing ring.
The Gamma ring comprises an elastic, sealing sleeve and a metal housing, which are not
firmly connected with one another. The metal housing acts as thrower ring, provides protection
and maintains the sleeve at the correct position. The sleeve is kept in the housing through the
radial lift that is applied and the associated preload condition. The Gamma ring is mounted on
the shaft with a press fit, and requires no additional fastening.
Mounting the Gamma ring
1. Grease the sealing lip of the sleeve. It is not permissible that grease is applied between
the sleeve and the housing.
2. Press the Gamma ring onto the shaft by applying constant and uniform pressure. When
required, use an appropriate mounting tool.
Position the Gamma ring so that there is a play of 1 mm with respect to the flat surface of
the bearing cover.
Maintenance
9.4 Corrective Maintenance
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018 99
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