Adjusting The Impeller Clearance - Wilo Padus PRO Einbau- Und Betriebsanleitung

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Adjusting the impeller clearance

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Fig. 8: Adjusting the impeller clearance
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Repairs
WARNING
Hand, foot or eye injuries due to the absence of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Closed safety goggles
The following preconditions must be met prior to starting repair work:
▪ Pump cooled down to the ambient temperature.
▪ Pump is switched voltage-free and secured against being activated inadvertently.
▪ Pump cleaned thoroughly and disinfected (if required).
For repair work the following generally applies:
▪ Wipe up spillage quantities of fluid and operating fluid immediately!
▪ Always replace O-rings, gaskets and screw locking devices!
▪ Observe the tightening torques in the appendix!
▪ Never use force when carrying out this work!
Using the device to pump abrasive fluids can result in wear on the impeller. This lowers
the pump's output. The clearance between the impeller and suction port can be adjus-
ted to compensate for impeller wear.
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1 Fastening nuts on suction strainer with baseplate
2 Faces to stop the impeller
3 Cap nut for impeller fixation
4 Readjustment slot: Adjusting screw groove to insert the open-ended spanner
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Pump has been removed.
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Pump has been thoroughly cleaned.
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Special tool to hand (open-ended spanner, included in scope of delivery).
1. Loosen the four hexagon nuts on the baseplate and remove with the washer.
2. Remove the suction strainer with baseplate.
3. Fix impeller in place, e.g. using an open-end wrench.
4. Loosen the cap nut for impeller fixation.
5. Remove the cap nut and washer.
6. Insert special tool (open-ended spanner) in the groove of the adjusting screw.
7. Turn the special tool clockwise until the impeller contacts the suction port.
8. Turn the special tool by one-quarter rotation anti-clockwise.
9. Put the washer in place and screw on the cap nut.
10.Tighten the cap nut:
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WILO SE 2019-10