Servicing The Pump; Servicing The Motor; Complete Motor; Motor Bearings - Biral HP 95-100-1/1 Notice De Montage Et D'utilisation

8.2

Servicing the pump

The pump bearings and shaft seal are maintenance-free.
8.3

Servicing the motor

8.3.1

Complete motor

The motor must be inspected at regular intervals. The length of the intervals depends on the envi-
ronment in which the motor is operating. The motor must be kept clean on the outside in order to
ensure adequate heat dissipation. If the motor is used in dusty conditions, it must be cleaned and
inspected more frequently than if it is operating in a dust-free environment. In the case of the MG
motors, the condensation cannot drain off if the motor is left in as-delivered condition. However, it
is possible to open the drain hole at the lowest point of the motor so that any condensation forming
in the stator housing, for example, can run off.
8.3.2

Motor bearings

Without grease nipples
The bearings are sealed for life. The expected service life is at least 18,000 hours of duty at
ambient temperatures up to 40°C. At higher ambient temperatures, the service life will be shorter,
however. A temperature increase of 10°C shortens the service life by 50%.
Bearing grease
As a minimum requirement, the bearing grease must meet the specifications of Class K3N to
DIN 51825 i.e.
– 50cSt (mm²/s) at 40°C
– 8cSt (mm²/s) at 100°C
Packing volume: 30–40%.
Motors with grease nipples
The bearings should be greased with the high-temperature grease specified on the motor type
plate. The lubrication intervals for ambient temperatures of 40°C and 60°C are specified on a
sticker showing the lubrication instructions. Once the bearings have been re-greased five times,
we recommend that the motor is dismantled in order to clean the bearings, check them for dam-
age and, if required, replace them. If the pump is only operated occasionally (motor unused for
longer than 6 months a year), we recommend that the motor bearings are greased when the pump
is taken out of service. The bearings should be greased as specified on the motor type plate con-
cerned. If the lubrication intervals are not adhered to, the service life of the bearings will be reduced.
Shorter lubrication intervals
The lubrication intervals should be shortened in the following cases:
– Dirty and dusty environments. The lubrication interval should be shortened by a factor
of 0.75.
– Very damp environments. The lubrication interval should be shortened by a factor of 0.9.
If the environment is very dusty and damp at the same time, the two factors should be
multiplied by one another.
Grease type and quantity
See motor type plate showing mechanical specifications.
English 27
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