EN – 14
Replacement of shaft seals
Recommended tools
• Specific extraction tool.
• Specific assembly mandrel.
• A support plate (or washer).
• A flat screwdriver
.
• A hammer.
• Flange (picture 1): the seal is extracted
using a screwdriver, resting on the plate
(or washer) so as not to damage the seal
housing, or
• Flanged stator (picture 2): the seal is
extracted with the specific extraction tool.
The seal housing and the seal lip are
lubricated with the lubricant used in the
pump.
The flange is resting on a flat surface.
According to the direction of assembly,
the seal is fitted on the assembly mandrel.
Using a press or a hammer, the seal is
inserted in its housing.
Check the position of the seal: it must lean
against its bearing.
They are fitted using the assembly mandrel according to the direction of assembly
below:
Direction of assembly
of shaft seals
Assembling
the shaft seal
Extracting a shaft
seal from its housing
ø 24.5 ± 0.1
5.5 ± 0.2
105*
ø 14
+0.2
0
1
at 45°
+0.2
0
Picture 1
Picture 2
Mandrel
* minimum dimension for the specific extraction tool.
Specific tools
HP rotor
frame
rear
fl ange
front
fl ange
seal-
holder
median
fl ange
Assembly of pumping module with no flanged stator
drawing (D)
HP stator
LP rotor
LP stator
washer
extraction tool
HP rotor
frame
rear
fl ange
seal-
holder
HP stator
LP rotor
LP stator
Assembly of pumping module with flanged stator
drawing (C)
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