Handling And Storage - Siemens 1LG0 Installation And Maintenance Manual

2.0 HANDLING AND STORAGE

When lifting the motors, always use the lifting eyes provided. Prior to lifting the motor
make sure that the lifting eyes are installed correctly and tightened. Never lift a motor
using the rotor shaft and fan cowling. In addition care must be taken during lifting and
lowering of the motor to avoid any shocks or vibrations which can result in bearing
damages.
It is recommended that all motor be stored in a dry, dust free environment and free of
excessive vibrations.
If the DE and NDE bearings are of the sealed types, it is recommended that they are
replaced if storage has exceeded 2 years from date of motor manufacture. If the motors
have the regreasable bearings, then the recommendation is to replace the grease after
2 years of storage.
The service life of the motor can be considerably reduced if the storage period
extends beyond 2 years in environments with high moisture and dirt. If necessary, the
insulation resistance of the winding could be measured determine the health of the
motor prior to installation and start-up, (see Section 3.5. for reference values).
Machined surfaces (fl ange, DE rotor shaft) are treated at the factory with an anti
corrosive agent to prevent rusting. However these surfaces should be retreated during
storage as deemed necessary. In addition the motor shaft should be rotated by hand on
a frequent basis to ensure even grease distribution.
5