Alfa Laval Alfie, Instruction Manual

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9 Maintenance
5. Remove the impeller (3) from the pump
body (4) by using suitable pliers or two
levers. Take care not to damage the pump
body.
6. If replacing the mechanical seal, separate
the pump body from the flange (6). Check
for wear inside the pump body.
7. Press out the seal seat from the pump body.
Remove the seal assembly from the shaft.
8. Inspect and clean all parts which will be
re-used.
G09869b1
Assembly of impeller and mechanical seal
1. Slide the rotating seal part onto the shaft with
a twisting movement and press the stationary
seal part into the pump body. Lubrication with
soap solution will ease the assembly.
2. Assemble the pump body to the flange,
taking care not to damage the seal.
G09869c1
3. Lubricate the impeller with grease or vaseline.
4. Push the impeller into the pump body with a
twisting movement in the operating direction,
centralizing the impeller hub.
5. Assemble the front cover O-ring and the front
cover.
Tightening torque: 8 Nm.
G09869d1
NOTE
If the screw caps are tightened harder the front cover
will bend which can cause leakages and the impeller
to jam.
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