Siemens LOHER CHEMSTAR 1PS2, Operating Instructions And Installation

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7.7 Greasing the roller bearings prior to commissioning
● Regrease the roller bearings prior to commissioning if the machine has been out of
operation for more than a year. The shaft must rotate so that the new grease can be
distributed across the bearings.
● Regrease the roller bearings prior to commissioning in the following circumstances:
– When the machine has been in storage in favorable conditions, e.g. in dry rooms that
are free of dust and vibrations. This applies to the period between delivery and
commissioning, or longer periods of stoppage.
– If the machine has been in storage in unfavorable conditions for more than two years.
Note
Pay attention to the instructions on the lubricant plate.
● If the machine is equipped with grease removal valves, after relubricating, remove the
grease used by completely withdrawing the valve mounted at the bearing several times.
The machine must be operational while doing this.
● If the machine is equipped with grease collection chambers, unscrew the grease collection
chambers after the interval specified on the plate with the motor stationary and remove the
spent bearing grease. If this is not done, the grease will clog and the bearings will overheat.
● Continually check the bearing temperature rise. When using the specified grease quality,
for a maximum room temperature of 40 °C, the maximum bearing temperature rise is 80 K.
Avoiding mechanical damage to bearings
Regularly inspect all machines for any mechanical damage. Especially observe that the
bearing replacement intervals and relubrication intervals, respectively grease change intervals
or oil change intervals specified by the machine manufacturer are maintained.
Replace the bearings once they have reached their nominal service life or verify that they are
mechanically in good working order as part of an inspection.
● Where bearings are sealed for life, there is a guarantee that the rated service life is achieved
only well after expiry of the service life of the grease in the bearing.
● The theoretical nominal service life of the bearings can be taken from the data sheet of the
machine if this was specified – or was specifically defined for mechanical design reasons
for a particular application.
● Where machines are subject to externally applied forces (e. g. the force on a drive belt or
axial forces arising from the driven machine), at the full loadings listed on the technical
specification the rated service life of the bearings is at least 20,000 hours.
● For all other machines, the rated service life of the bearings is at least 40,000 hours.
● For bearings with external oil supply, monitor the lubrication system to ensure that it is
operating correctly.
Start-up
7.7 Greasing the roller bearings prior to commissioning
LOHER CHEMSTAR 1PS2
Operating Instructions 08/2016
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