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7.2 Maintenance work
●
Open and vent the pump shaft or station.
●
Inspect the internal chamber visually for:
-
a build-up of coating,
-
deposits on accessories.
●
Block the sewage inlet(s) (using an air stopper for example).
●
Measure the delivery head at Q=0.
-
Where the pump flow rate drops by more than 10%, remove the pump from the shaft.
Check the impeller and pump housing for wear and tear.
●
Check the shaft level.
●
Drain the shaft manually until low-level emptying begins.
-
Check the base of the shaft for any deposits.
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Where major deposits are present, clean the shaft.
●
Fill the shaft and complete a test run.
●
Where it is impossible to measure the flow rate:
-
Wait until the shaft is full and the pump is operating;
-
Measure the time between switching on and off (t) and the drop in the level (Δh);
-
Calculate the flow rate using the following formula:
Shaft WS800
Shaft WS1100
Shaft WB100
Shaft WB150
Shaft WB200
Rectangular shaft
Results in [m³/h]
7.3 Changing the oil
It is recommended that you change the oil in the sealing chamber / separating chamber once a
year or after 1000 hours of operation.
Changing the oil:
●
Draw the shaft out of the pump and spray clean.
●
Allow the motor to cool down.
●
Remove the motor and adapter from the pump housing.
●
Remove the impeller from the shaft.
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Detach the motor from the adapter.
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Loosen the oil vent screw (M8 with slit) on the lid of the motor and vent the oil.
ATTENTION!
●
Collect the used oil in suitable containers and dispose of in accordance with EU Directive
75/439/EEC and the decrees issued in accordance with Articles 5a of the Waste Act and
Used Oil Order (in Germany).
ATTENTION!
●
Fill the sealing chamber with oil and close.
ATTENTION!
Q = 20 x t [s] x
Q = 33.2 x t [s] x
Q = 28.3 x t [s] x
Q = 63.6 x t [s] x
Q = 113.1 x t [s] x
Q = 36 x A [m] x B [m] x t [s] x
There may be excess pressure in the sealing chamber/separating
chamber!
Oil must not be discharged into the natural environment or into drains!
For oil amounts see section 4.1.
h [cm]
Δ
h [cm]
Δ
h [cm]
Δ
[cm]
Δh
h [cm]
Δ
h [cm]
Δ
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