en
Repairs
26
WILO SE 2019-10
9.5.6
General overhaul
During the general overhaul, the motor bearings, shaft sealings, O-rings and connection
cables are checked for wear and damage. Damaged components are replaced with ori-
ginal parts. This ensures correct operation.
The general overhaul is performed by the manufacturer or an authorised service centre.
10
Repairs
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is danger of limbs be-
ing severed! Protective gloves must be worn to protect from cuts.
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:
ƒ
Pump cooled down to the ambient temperature.
ƒ
Pump is switched voltage-free and secured against being activated inadvertently.
ƒ
Pump cleaned thoroughly and disinfected (if required).
For repair work the following generally applies:
ƒ
Wipe up spillage quantities of fluid and operating fluid immediately!
ƒ
Always replace O-rings, gaskets and screw locking devices!
ƒ
Observe the tightening torques in the appendix!
ƒ
Never use force when carrying out this work!
10.1
Adjusting the impeller clearance
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.
1
2
2
3
4
2
1
3
Fig. 8: Adjusting the impeller clearance
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
‡
Pump has been removed.
‡
Pump has been thoroughly cleaned.
