Wilo -EMU TR 50-2 Serie Notice De Montage Et De Mise En Service page 322

en
9.6 Repairs
9.6.1 Instructions on using screw lock-
ing devices
9.6.2 Which repair work may be carried
out
322
Maintenance and repair
▪ Shaft sealings
▪ O-rings
▪ Connection cable
▪ Fitted accessories
Damaged components are replaced with original parts. This will ensure correct opera-
tion. The general overhaul is performed by the manufacturer or an authorised service
centre.
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
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.
▪ Replace the handle grip.
▪ Replacement of the frame.
▪ Replacement of the mounting bracket for ground installation.
WILO SE 2019-01