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Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
5.
Carefully slide the propeller back on as far as it will go.
6.
Securing the propeller: Coat the interior hexagonal head screw with the thread-locking
fluid, insert the washer and screw it into the shaft.
7.
Tighten the propeller attachment. Max. tightening torque: see appendix.
8.
Turn the propeller by hand and check that it rotates easily.
▶
Propeller is changed. Check the oil quantity in the pre-chamber and if necessary, top
up oil.
9.6.6
Replacing the mechanical seal on
the fluid side
1
2
3
4
Fig. 20:
Replacing mechanical seals
1
Shaft
2
Packing sleeve
3
Mechanical seal: Stationary ring
4
Mechanical seal: Spring
✓
Mixer set down on a firm surface and secured.
✓
Tools are ready for use.
✓
Oil drained from the pre-chamber.
✓
Propeller removed.
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 its seating and remove from the
shaft.
4.
Clean the shaft and check for wear and corrosion.
WARNING! Contact customer service
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 assembly
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 frac-
ture. 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 on the packing sleeve in position using a rubber mallet.
8.
Install a new mechanical seal spring on the shaft.
9.
Mount the propeller.
▶
Mechanical seal is replaced. Top up oil in the pre-chamber.
9.6.7
Replacing the handle grip
1
2
3
4
5
6
Fig. 21:
Replacing the frame
1
1x Frame fixation material: Hexagon head screw, 2x washers, hexagon nut
2
Frame
3
2x mixer fixation material: Hexagon head screw, washer
4
Handle grip
5
Shackle
6
Cable bracket fixation: Washer, hexagon nut
✓
Mixer set down on a firm surface and secured.
✓
Tools are ready for use.
1.
Disassembling cable brackets:
- Undo and unscrew the hexagon nut.
- Pull off the washer from the hexagon head screw.
2.
Undoing the handle grip fixation on the frame:
- Undo and unscrew the hexagon nut.
- Pull off the washer from the hexagon head screw.
- Pull out the hexagon head screw.
