Wilo EMU TR 212 Instrucciones De Instalación Y Funcionamiento página 41

9.6.2 Which repair work may be carried
out
9.6.3 Propeller replacement
9.6.4 Replacing the mechanical seal on
the fluid side
5
6
4
1
Fig. 13: Changing mechanical seal on fluid side
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3
Maintenance and repair
then the compound must be heated to approx. 300 °C (572 °F). Clean the components thor-
oughly 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 the clamping force.
ƒ
Propeller replacement
ƒ
Replacement of mechanical seal on the fluid side.
ƒ
Replace the handle grip.
ƒ
Replacement of the frame.
Refer to separate instructions on installing the blades for all information about replacing
propeller blades.
1 Shaft
2 Packing sleeve
3 Mechanical seal: Stationary ring
2
4 Mechanical seal: Spring
5 Propeller blade
6 Hub
‡
Mixer set down on a firm surface and secured.
3
‡
Tools are ready for use.
‡
Oil drained from the pre-chamber.
‡
Propeller (blade with hub) dismantled.
1. Remove the mechanical seal spring from the shaft.
2. Carefully remove the packing sleeve using a rubber mallet.
3. Push the stationary ring of the mechanical seal out of the housing and remove from the
shaft.
4. Clean the shaft and check for wear and corrosion. WARNING! Contact customer ser-
vice if the shaft has been damaged!
5. Lubricate the shaft using wetted water or detergent. CAUTION! Do not use oil or
grease as lubricants!
6. Press in a new stationary ring for the mechanical seal into the housing using an assem-
bly unit. CAUTION! Do not tilt the stationary ring when pushing it in. If the stationary
ring is tilted or installed at an angle when it is pushed in, the stationary ring will
fracture. The mechanical seal can then no longer be used!
7. Installing the packing sleeve: Coat the packing sleeve mating surface using Loctite 262
or 2701. Press the packing sleeve into position using a rubber mallet.
8. Install a new mechanical seal spring on the shaft.
9. Mount propeller.
▶ Mechanical seal is replaced. Top up oil in the pre-chamber.
en-US
41