AW2 – Appendix Motor Bearings
AW-2
Appendix W2 Maintenance of Motor Bearings (cont.)
Our motors from 45 kW are
fitted with “open” ball bearings.
Motors this size and up have re-lubrication devices on the A-
and B-sides.
These bearings must be re-lubricated regularly in accordance
with the information given in the maintenance check sheet.
Our motors are pre-lubricated from the factory with a polyurea-
based high-temperature grease for min. 150°C.
For instance, SKF LGHP 2 or a polyurea-based equivalent
is to be used. Order no.: 10254
It is imperative that these specifications are adhered to when
re-lubricating the motor bearings as mixing different greases
can significantly shorten the life of the bearings.
NB!
If operating conditions are different, it is imperative that the
maintenance intervals are adjusted to the local circumstances
and conditions to ensure reliable operations. This means that
should there be high levels of dirt and dust, frequent switch-ons
and high ambient temperatures as well as operations at 60Hz,
the maintenance intervals must be shortened.
Please carry out the following steps to re-lubricate the mo-
tor bearings:
1. Switch off unit and prevent it from being restarted by
accident.
2. Thoroughly clean the grease nipples and surrounds.
3. Remove the cap of the re-lubrication device.
4. Remove the cover of the drainage opening (usually oppo-
site). Excess grease is discharged here.
5. Introduce approx. half of the grease to be used for re-
lubrication – it is best to use a grease gun. Then let the mo-
tor run for approximately 1 minute.
6. Switch the unit off and introduce the remaining re-lubrication
grease.
7. Re-install the cap of the re-lubrication device and the cover of
the drainage opening.
If the motors are idle for a longer period of time, the motor shaft
should be rotated once a month. Rotate the motor shaft manu-
ally for at least 5 rotations and bring to a stop in a different posi-
tion to the starting position.
If the motors have to be idle for more than 6 months, the motor
bearings must be re-lubricated before start-up.
If the motors have to be idle for more than 2 years, the motor
bearings must be replaced.
Motor bearings re-
quiring re-
lubrication
Procedure for re-
lubrication
Idleness of
motors
