Maintenance And Service; Annual Maintenance; Oil Change - Grundfos SEG Instrucciones De Instalación Y Funcionamiento

11. Maintenance and service

Warning
Before starting work on the pump, make sure that the
fuses have been removed or the mains switch has
been switched off. Make sure that the power supply
cannot be accidentally switched on.
All rotating parts must have stopped moving.
Warning
Except for service on the pump parts, all other
FM
service work must be carried out by Grundfos or a
service workshop authorized by Grundfos.
Flush the pump thoroughly with clean water before maintenance
and service. Rinse the pump parts in water after dismantling.
Warning
When loosening the screws of the oil chamber, note
that pressure may have built up in the chamber. Do
not remove the screws until the pressure has been
fully relieved.

11.1 Annual maintenance

Pumps running normal operation must be checked every 3000
operating hours or at least once a year. If the dry solids content of
the pumped liquid is very high or sandy, check the pump at
shorter intervals.
Check the following points:
•
Power consumption
See section
5.1 Nameplate.
•
Motor oil level and oil condition
Check the condition of the oil and replace oil and shaft seal if
oil is contaminated. After replacement of the shaft seal, check
the oil level after one week of operation.
Use Shell Ondina X420 oil or similar type. See sections
11.2 Oil change.
Used oil must be disposed of in accordance with
Note
Note
local regulations.
•
Cable entry
Make sure that the cable entry is watertight and that the
cables are not sharply bent and/or pinched. See section
11.5 Service kits.
A possible replacement of the cable must be carried
Note
Note
out by Grundfos or a service workshop authorized by
Grundfos.
•
Pump parts
Check the impeller, pump housing, etc. for possible wear.
Replace defective parts. See section
•
Ball bearings
Check the shaft for noisy or heavy operation (turn the shaft by
hand). Replace defective ball bearings.
•
Grinder system or parts
In case of frequent choke-ups, check the grinder system for
wear. When worn, the edges of the grinding parts are round
and worn. Compare with a new grinder system.

11.2 Oil change

Motor oil quantities
The table states the quantity of oil in the oil chamber of SEG
pumps:
Draining of oil
1. Loosen and remove both oil screws to allow all the oil to drain
2. Check the oil for water and impurities. If the shaft seal has
Filling with oil
Pump in horizontal position:
1. Place the pump in such a position that it is lying on the stator
2. Fill oil into the oil chamber through the upper hole until it starts
3. Fit both oil screws using the packing material included in the
Pump in vertical position:
1. Place the pump in upright position on a plane, horizontal
11.5 Service kits.
2. Fill oil into the oil chamber through one of the holes until it
3. Fit both oil screws using the packing material included in the
Warning
When loosening the screws of the oil chamber, note
that pressure may have built up in the chamber. Do
not remove the screws until the pressure has been
fully relieved.
Pump type
2.0 hp (1.5 kW)
3.0 to 5.5 hp (2.6 to 4.0 kW)
from the chamber.
been removed, the oil will give a good indication of the
condition of the shaft seal.
Used oil must be disposed of in accordance with
Note
Note
local regulations.
housing and the outlet flange and so that the oil screws are
pointing upwards. See fig. 11.
running out of the lower hole. The oil level is now correct.
kit. See section
11.5 Service
Oil filling
Oil level
Fig. 11 Oil filling holes
surface.
starts running out of the other hole. For oil quality, see the
table above.
kit. See section
11.5 Service
Oil in oil chamber
[oz (l)]
6.0 (0.17)
15.0 (0.42)
kits.
kits.
15