Servicing The Product; General Information; Yearly Maintenance; Checking And Changing The Motor Oil - Grundfos SEG AUTOAdapt Service Instructions Manual

10. Servicing the product

10.1 General information

DANGER
Crushing of hands
Death or serious personal injury
- Before starting service work, remove the fuses or
switch off the power supply. Make sure that the
power supply cannot be accidentally switched on.
- All rotating parts must have stopped moving.
Except for the replacement or dismantling of the
pump housing, shaft seal or impeller, all other service
work must be carried out by Grundfos or an
authorised service workshop.
The paint on the motor is part of the protection of the
product. If the paint is damaged, apply new paint to
keep the sealing effect of the paint intact.
All service work must be carried out by specially trained staff.
Before carrying out service, make sure that the pump has been
thoroughly flushed with clean water. Rinse the pump parts in
water after dismantling.
Position numbers of parts (digits) refer to section
Position numbers of tools (letters) refer to section
tools.

10.2 Yearly maintenance

Check pumps running normal operation 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 these points:
•
Power consumption
See section
4.1 Nameplate.
•
Oil level and oil condition
See section
10.3 Checking and changing the motor
•
Electronic unit
See section
11.3 Electronic
•
Sensors
See section
11.5 Replacing the
•
Cable entry
Make sure that the cables are not sharply bent and/or pinched.
See section
10.6 Replacing the
•
Shaft seal
See section
10.4 Checking the shaft
•
Pump parts
Check the impeller and pump housing for possible wear.
Replace defective parts.
See section
11. Dismantling and assembling the
•
Ball bearings
Check the shaft for noisy or heavy operation by turning the
shaft by hand. Replace defective ball bearings. In case of
defective ball bearings or poor motor function, a complete
overhaul of the product is usually required. A complete
overhaul must be carried out by Grundfos or an authorised
service workshop. See sections
and
11.2.1 Fitting the bearings.
Defective bearings may reduce the Ex safety.
Bearings of explosion-proof products must only be
replaced by an authorised Ex workshop.
10
13. Drawings.
9. Service
oil.
unit.
sensors.
cable.
seal.
product.
11.1.6 Removing the bearings
•
O-rings and similar parts
During service or replacement, make sure that the grooves for
O-rings and seal faces have been cleaned before the new
parts are fitted.
Do not reuse used rubber parts.
•
Grinder system
In case of frequent choke-ups, check the grinder system for
wear. If worn, the edges of the grinding parts are round and
worn. Compare with a new grinder system.
•
Insulation resistance
Megging must take place at a voltage of minimum 1000 V. The
insulation resistance measured must be minimum 2 MΩ.

10.3 Checking and changing the motor oil

When the pump is new or after replacement of the shaft seal,
check the motor liquid level and water content after one week.
Change the oil in the oil chamber at least once a year or after
3000 operating hours. The number of operating hours can be
read by means of a CIU XX2 and a Grundfos GO remote control.
Change the oil if the shaft seal has been replaced.
CAUTION
Pressurised system
Minor or moderate personal injury
- When slackening 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.
Quantity of oil
The table shows the quantity of motor oil in the cooling chamber.
Pump type
[kW]
0.9 to 1.5 kW
2.6 to 4.0 kW
Use Shell Ondina X420 motor oil (product No 96586753).
Draining the motor oil
1. Place the pump with the oil level screw pointing downwards.
See fig. 6.
1
2
Oil screws
Fig. 6
Pos. Description
1 Oil filling screw
2 Oil level screw
Oil in oil chamber
[l]
0.17
0.42