en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
37
The following preconditions must be met prior to starting repair work:
•
Wear protective equipment! Observe the work regulations.
–
Safety shoes: Protection class S1 (uvex 1 sport S1)
–
Protective gloves: 4X42C (uvex C500 wet)
–
Safety goggles: uvex skyguard NT
For detailed marking of frame and disc, see the section on “Personal protective equip-
ment [
7]”.
•
The mixer has been thoroughly cleaned and disinfected.
•
Motor must have cooled down to the ambient temperature.
•
Workplace:
–
Clean, good lighting and ventilation.
–
Firm and stable work surface.
–
Secured against falling over and slipping.
CAUTION! Do not set the mixer down on the propeller! Provide an appropriate platform.
NOTICE! Only carry out the repair work described in these installation and operating in-
structions.
For repair work, the following 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!
•
The use of force is strictly prohibited!
9.6.1
Instructions on using screw locking
devices
A screw locking device can be used on the screws. Screw locking is done at the factory us-
ing two different methods:
•
Thread-locking fluid
•
Mechanical screw locking device
Always re-apply the screw locking device!
Thread-locking fluid
Medium-strength thread-locking fluid (e.g. Loctite 243) is used for the liquid screw locking
compound. This threadlocker can be loosened with increased force. If the thread-locking
fluid cannot be loosened, then the compound must be heated to approx. 300 °C (572 °F).
Clean the components thoroughly after dismantling.
Mechanical screw locking device
The mechanical screw locking device consists of two Nord-Lock wedge lock washers. The
screw connection is secured by a clamping force.
9.6.2
Which repair work may be carried
out
•
Propeller replacement
•
Replacement of mechanical seal on the fluid side.
•
Replace the handle grip.
•
Replacement of the frame.
•
Replacement of the mounting bracket for ground installation.
