en
Maintenance and repair
32
WILO GVA GmbH 2019-02
9.6
Repairs
DANGER
Danger from fluids hazardous to health!
Risk of fatal injury if the mixer is used in fluids hazardous to health.
• Decontaminate the mixer after dismantling and before carrying out any other
work.
• Observe the specifications provided by work regulations. The operator must
make sure that personnel have received and read work regulations.
WARNING
The propeller blade has sharp edges!
Sharp edges can form on the propeller blades. There is a risk of limbs being severed.
Wear safety gloves to protect against 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
For repair work, the following applies:
ƒ
Wipe up drips immediately.
ƒ
Always replace O-rings, gaskets and screw locking devices.
ƒ
For torques, see “Appendix [
}
38]”.
ƒ
Never use inappropriate force when carrying out this work.
Preparatory tasks
‡
Work must be carried out by two persons.
‡
Mixer decommissioned. See “Decommissioning [
}
25]”.
‡
Mixer is removed. See “Dismantling [
}
25]”.
‡
Mixer is disinfected. See “Clean and disinfect [
}
27]”.
1. Required tools are to hand.
2. Set the mixer down on a clean, even work surface.
3. Secure the mixer against slipping.
4. Prepare hoisting gear with lifting gear.
5. Prepare scantlings in order to lie the mixer horizontally.
6. Only carry out authorised repairs.
▶ Begin repairs.
9.6.1
Instructions on using screw lock-
ing devices
Screwed connections can be fitted with a screw locking device. Self-locking nuts are
used as screw locking devices.
Always
replace screw locking devices!
9.6.2
Which repair work may be carried
out
ƒ
Replacing the cover cap and propeller blades.
ƒ
Replacing the hub.
ƒ
Replacing the mixer shaft.
ƒ
Replacing the drive unit.
