Wilo Flumen OPTI-TR 20-1 Instrucciones De Instalación Y Funcionamiento página 311

9.6.1 Instructions on using screw lock-
ing devices
9.6.2 Which repair work may be carried
out
9.6.3 Propeller replacement
4
3
Fig. 15: Propeller replacement
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 28-1, 30-1, 40-1 Wilo-Flumen EXCEL-TRE 20, 30, 40
Maintenance and repair
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:
▪ Mixer cooled to ambient temperature.
▪ Mixer is switched voltage-free and safeguarded against being inadvertently activated.
▪ Mixer must be thoroughly cleaned and disinfected (if required).
For repair work the following generally applies:
▪ Immediately collect dripping fluid and operating fluids!
▪ Always replace O-rings, gaskets and screw locking devices!
▪ Observe the tightening torques in the appendix!
▪ Never use force when carrying out this work!
A screw locking device can be used on the screws. Screw locking is done at the factory
using 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 ap-
prox. 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.
▪ Propeller replacement
▪ Replacement of mechanical seal on the fluid side.
▪ Replacement of the frame.
▪ Replacement of the mounting bracket for ground installation.
1 Propeller
1
2 Propeller attachment: Interior hexagonal head screw and washer
3 Shaft
4 Mechanical seal
‡
Mixer set down on a firm surface and secured.
‡
Tools are ready for use.
1. Loosen and unscrew the propeller attachment. NOTICE! Fix the propeller in place
with suitable equipment.
2. Carefully remove the propeller from the shaft. CAUTION! The mechanical seal is
now no longer secured. Only operate the mixer with the propeller! If the mixer
2
is operated without the propeller, the mechanical seal will be destroyed. If the
mechanical seal is faulty, oil escapes from the sealing chamber.
3. Clean the shaft and apply new lubricating grease.
4. Carefully slide the propeller back on as far as it will go.
5. Coat the interior hexagonal head screw with the thread-locking fluid, insert the
washer and screw it into the shaft.
6. Tighten the propeller attachment. Max. tightening torque: see appendix.
en
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