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9.6.3
Propeller replacement (PUR)
Installation and operating instructions Wilo-EMU TR/TRE 50-2 ... 120-1
Maintenance and repair
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Fig. 13: Propeller replacement (plastic)
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Hub screw cap
2
Propeller
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O-ring
4
Mechanical seal
5
Packing sleeve
6
Propeller attachment: Interior hexagonal head screw and washer
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Retaining ring
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Pressure disc
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Shaft
‡
Mixer set down on a firm surface and secured.
‡
Tools are ready for use.
1. Unscrew the hub screw cap.
2. Loosen and unscrew the propeller attachment. NOTICE! Fix the propeller in place
with suitable equipment.
3. Check the retaining ring is positioned correctly. The retaining ring secures the
pressure disc.
4. Carefully remove the propeller from the shaft: Screw in the M16 screw (min. 40 mm
long) into the pressure disc. This presses the propeller from the shaft. CAU-
TION! The mechanical seal is now no longer secured. Only operate the mixer
with the propeller! If the mixer is operated without the propeller, the mechan-
ical seal will be destroyed. If the mechanical seal is faulty, oil escapes from the
pre-chamber.
5. Clean the shaft and apply new lubricating grease.
6. Carefully slide the propeller back on as far as it will go.
7. Securing the propeller: Coat the interior hexagonal head screw with the thread-
locking fluid, insert the washer and screw it into the shaft.
8. Tighten the propeller attachment. Max. tightening torque: see appendix.
9. Turn the propeller by hand and check that it rotates easily.
10.Place a new O-ring in the hub screw cap.
11.Screw on the hub screw cap.
▶ Propeller is changed. Check the oil quantity in the pre-chamber and if necessary,
top up oil.
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