Maintenance and repair
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Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3
37
7. Clean the drain hole screw plug, replace the seal ring and screw it back in.
Max.
tightening torque: 8 Nm (5.9 ft·lb)!
8. Pour the operating fluid through the filler hole.
⇒ Comply with the specifications for the operating fluid type and quantity!
9. Clean the filler hole screw plug, replace the seal ring and screw it back in.
Max.
tightening torque: 8 Nm (5.9 ft·lb)!
10.Restore corrosion protection: Seal screw plug, e.g. with Sikaflex.
9.5.8
General overhaul
The following components are checked for wear and damage as part of general main-
tenance:
ƒ
Motor bearings
ƒ
Gear bearing and planetary gear speed
ƒ
Propeller
ƒ
Shaft sealings
ƒ
O-rings
ƒ
Connection cable
ƒ
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.
9.6
Repairs
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:
ƒ
Mixer cooled to ambient temperature.
ƒ
Mixer is switched voltage-free and safeguarded against being inadvertently activ-
ated.
ƒ
Mixer must be thoroughly cleaned and disinfected (if required).
For repair work the following generally applies:
ƒ
Immediately collect dripping fluid and operating fluids!
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!
9.6.1
Instructions on using screw lock-
ing devices
A screw locking device can be used on the screws. Screw locking is done at the factory
using two different methods:
ƒ
Thread-locking fluid
ƒ
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.
