English (GB)
21
10.1 Checking and changing the motor liquid
10.1.1 SL pumps
The shaft seal housing has two screws: A and B.
Screw A is for filling motor liquid into the shaft seal housing.
Screw B is for checking the level of motor liquid and for draining
motor liquid from the shaft seal housing.
See fig. 11 which applies to installation type S.
Fig. 11 SL pump, vertical view
For SL pump, installation type S, the motor liquid level can be
checked by removing screw A. See fig. 12.
Fig. 12 SL pump, horizontal view
Draining motor liquid, horizontal and vertical installation:
Place a container under the pump to collect all the drained-off
motor liquid; then place the pump in a horizontal position.
Remove screw B, fig. 12, which is facing downwards. Allow all
motor liquid to drain from the housing into the container.
Filling motor liquid, vertical installation:
While the pump is standing vertically, fill the shaft seal housing
with motor liquid through hole A until the motor liquid level
reaches hole B. See fig. 11. Replace the O-rings with new rings,
insert the screws and tighten securely.
Filling motor liquid, horizontal installation:
Place the pump horizontally with plug B mounted and facing
downwards. Fill the shaft seal housing with motor liquid through
hole A until the motor liquid reaches the level according to fig. 12.
Replace the O-ring with new ring, insert screw A and tighten
securely.
10.1.2 SE pumps
The shaft seal housing has three screws: A, B and C.
Screw A is used both for checking the level of motor liquid and for
filing motor liquid.
Screw B is used for draining motor liquid from the shaft seal
housing.
Screw C is used both for checking the level of motor liquid and for
filing motor liquid but only in installation type H. See fig. 15.
Fig. 13 SE pump, motor liquid level, top view
Clean the outside of the pump at regular intervals
in order to retain the heat conductivity.
Change the motor liquid every four years to
prevent oxidation.
There must be a minimum of 10 % air in the shaft
seal housing due to thermal expansion of the
motor liquid during operation.
Lack of motor liquid may cause overheating and
damage of the mechanical seals.
Use motor liquid SML3.
TM05 2768 0612TM05 2768 0612
Warning
When loosening screw B of the shaft seal
housing, note that pressure may have built up in
the chamber. Do not remove the screw until the
pressure has been fully relieved.
Used motor liquid must be disposed of in
accordance with local regulations.
Warning
When loosening screw A of the shaft seal
housing, note that pressure may have built up in
the chamber. Do not remove the screw until the
pressure has been fully relieved.
TM05 2774 0512
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