en Faults, causes and remedies
34 WILO SE 2019-04
7.2 7.2 2.2 2.1 3.2 7.27.1 7.1
Fig.29: Fitting the slide-in unit
Fig.30: Inserting the slide-in unit
1. Mark positions of the parts that belong together with a coloured pen or scriber.
2. Mount the impeller disc, impeller (2.1) and key(s) (3.2) on the shaft and tighten
with the impeller nut (2.2).
3. Mount the protective grid (7.1) with interior hexagonal head screws (7.2).
4. Put the slide-in unit down at a safe workplace. To continue dismantling the slide-
in unit, fix it vertically in position with the drive shaft facing downward. The kit
must be removed vertically to avoid damage to the impellers, neck rings and other
parts.
5. Insert a new housing seal (1.2).
6. Carefully insert the slide-in unit into the spiral housing (1.1) and tighten with the
hexagon head screws (14).
9.6.3 Screw tightening torques
Fig.31: Screw tightening torques
When tightening the screws, use the following tightening torques.
▪A (pump)
Thread: M8 M10 M12 M16 M20 M24
Tightening torque
[Nm]
25 35 60 100 170 350
Table9: Screw tightening torque A (pump)
▪B (coupling): Refer to table "Tightening torques for adjusting screws and coupling
halves” in chapter “Coupling alignment”.
▪C (baseplate): Refer to table “Tightening torques for pump and motor” in chapter
“Alignment of the pump unit”.
10 Faults, causes and remedies
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work can lead to death due to electric
shock! Electrical work must be carried out by a qualified electrician in accordance
with the locally applicable regulations.
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