Grundfos SEG - Oil Check and Change

• Power consumption
See the nameplate.
• Oil level and condition
When the pump is new or after replacement of the
shaft seal, check the oil level after one week of
operation.
Use Shell Ondina X420 oil or equivalent type. Oil
auto-ignition temperature must be above 180 °C.
• Cable entry
Make sure that the cable entry is
watertight and the cables are not
sharply bent or pinched.
• Pump parts
Check the wearing parts and replace the defective
ones.
• Ball bearings
Check the shaft for noisy or heavy operation by
turning the shaft by hand. Replace defective ball
bearings.
A general overhaul of the pump is usually
required in case of defective ball bearings or poor
motor function. This work must be carried out
by Grundfos or an authorised service workshop.
Bearings are lubricated for a lifetime.
• Grinder system and parts
In case of frequent choke-ups, check the grinder
system for visible wearing. If necessary, replace
the grinder system.
Related information
2.3 Identification
7.3 Oil check and change
7.8 Service kits
7.3
Oil check and change
Change the oil in the oil chamber every 3000
operating hours or at least once a year or if the shaft
seal is replaced. The table below indicates the oil
quantity in the oil chamber.
In case of the drained oil contains water, check and
replace the shaft seal.
Pump type
Quantity of oil in the
oil chamber [l]
SEG up to 1.5 kW 0.17
SEG 2.6 - 4.0 kW 0.42
Draining of oil
CAUTION
Pressurised system
Minor or moderate personal injury
‐ The oil chamber may be under
pressure. Loosen the screws carefully
and do not remove them until the
pressure is completely relieved.
1. Loosen and remove both oil screws to allow all
the oil to drain from the chamber.
2. Check the oil for water and impurities. If the shaft
seal is removed, the oil indicates the condition of
the shaft seal.
Dispose of used oil in accordance with
local regulations.
Oil filling, pump in a horizontal position
1. Place the pump horizontally on the stator housing
and make sure the outlet flange and the oil screws
are pointing upwards.
2. Fill oil into the oil chamber through the upper hole
until it starts running out of the lower hole. The oil
level is now correct.
3. Fit both oil screws with the gaskets included in the
O-ring service kit.
1
2
TM065748
Oil filling holes
Pos. Description
1 Oil filling
2 Oil level
Oil filling, pump in a vertical position
1. Place the pump on a plain, horizontal surface.
2. Fill the oil into the oil chamber through one of the
holes until it starts running out of the other hole.
Fit both oil screws with the gaskets included in the
O-ring service kit.
Related information
7.7 Checking or replacing the shaft seal
7.8 Service kits
22
English (GB)