Cleanliness; Condensation Drain Plugs; Service; General Inspection - ABB M2B Serie Manual De Instalación, Manejo Y Mantenimiento

3.4 Cleanliness

Keep both the interior and exterior of the motor free
from dirt, water, oil and grease. Motors operating in dirty
places should be periodically disassembled and
thoroughly cleaned.

3.5 Condensation drain plugs

All the motors are equipped with closable plastic drain
plugs in the drain holes. The plugs are open on
delivery. When mounting the motors, make sure that
the drain holes face downwards. In the case of vertical
mounting, the upper plug must be hammered home
completely. In very dusty environments, both plugs
should be hammered home.

4. Service

Warning
Disconnect and lock out before working on motor or
driven equipment.
Caution
Overgreasing bearings can cause premature bearing
and/or motor failure. The amount of grease added
should be carefully controlled.

4.1 General inspection

1. Inspect the motor at regular intervals.
2. Keep the motor clean and ensure free ventilation
fl ow.
3. Check the condition of shaft seals and replace if
necessary.
4. Check the conditions of connections and mounting
and assembly bolts.
5. Check the bearing condition by listening for unusual
noise, vibration measurement, bearing temperature,
inspection of spent grease or SPM bearing
monitoring.
When changes of conditions occur, dismantle the
motor, check the parts and replace if necessary.

4.2 Lubrication

WARNING
Beware of all rotating parts!
WARNING
Grease can cause skin irritation and eye
infl ammation. Follow all safety precautions specifi ed
by the manufacturer.
ABB / Low Voltage NEMA Motors / Manual 03-2006
Lubrication information plate and general
lubrication advice
If the machine is fi tted with a lubrication information
plate, follow the given values.
On the lubrication information plate, regreasing intervals
with regard to mounting, ambient temperature and
speed of rotation can be defi ned.
During the fi rst start or after a bearing lubrication it may
appear a temporary temperature rise, appr. 10-20
hours. ABB policy is to have reliability as a vital issue in
bearing lubrication intervals. That is why we follow the
L -principle.
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A. Manual lubrication
Regreasing while motor is running
– Remove grease outlet plug or open closing valve if
fi tted.
– Be sure that the lubrication channel is open
– Press the specifi ed amount of grease into the
bearing.
– Let the motor run 1-2 hours to ensure that all excess
grease is forced out of the bearing. Close the grease
outlet plug or closing valve if fi tted.
Regreasing while motor is at a standstill
Regrease motors while running. If this is not possible,
lubrication can be carried out while the machine is at a
standstill.
– In this case, use only half the quantity of grease, then
run the motor for a few minutes at full speed.
– When the motor has stopped, press the rest of the
specifi ed amount of grease into the bearing.
– After 1-2 running hours close the grease outlet plug
or closing valve if fi tted.
B. Automatic lubrication
The grease outlet plug must be removed permanently
with automatic lubrication or open closing valve if fi tted.
Some motors may be equipped with a collector for old
grease. Follow the special instructions given for the
equipment.
We recommend only the use of electromechanical
systems. Contact your local ABB Sales Offi ce.
The amount of grease per each lubrication interval
stated in the table below should be doubled if an
automatic regreasing system is used.
If 2-pole motors are being automatically regreased, the
note (NOTE!) concerning lubricant recommendations
given for 2-pole motors in the chapter Lubricants shall
be followed.
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