Wilo Vardo WEEDLESS-F Notice De Montage Et De Mise En Service page 259

4 8 9
Fig. 14: Mounting the stretching device
9.6.5 Replacing the mixer shaft
9.6.6 Replacing the drive unit
Installation and operating instructions Wilo-Vardo WEEDLESS-F
Maintenance and repair
1. Place the flat gasket on the lower end of the mixer shaft and slide up as far as it will
go.
2. Place the rear tensioning kit on the mixer shaft and slide up as far as it will go.
3. Place the hub on the mixer shaft and slide up as far as it will go.
4. Tighten interior hexagonal head screws (4x silver) in a crosswise manner until
hand-tight.
⇒ The hub is now secured against slipping.
5. Tighten interior hexagonal head screws (10x black) in a crosswise manner until
hand-tight.
6. Place stretching device on mixer shaft and hub ring.
7. Affix the stretching device to the mixer shaft: Screw in the hexagon head screw
through the stretching device and into the centring hole in the mixer shaft.
8. By slowly turning the hexagon head screw, mount the hub completely on the mixer
shaft. NOTICE! End position: The stretching device is flush with the mixer shaft
and the hub ring!
9. Tighten all interior hexagonal head screws in a crosswise manner. Tightening
torque: 35 Nm (26 ft·lb)!
⇒ The hub is firmly fixed to the mixer shaft.
10.Remove the stretching device: Remove the hexagon head screw.
11.Tighten covered interior hexagonal head screws in a crosswise manner. Tightening
torque: 35 Nm (26 ft·lb)!
12.Place the front tensioning kit on the mixer shaft and slide up as far as it will go.
1 Mixer shaft
1 10
4 Interior view of hub
8 Stretching device (auxiliary tool)
9 Hexagon head screw
10 Hub ring
13.Tighten front tensioning kit: Tighten all interior hexagonal head screws in a cross-
wise manner. Tightening torque: 35 Nm (26 ft·lb)!
▶ Hub is replaced. Install the mixer, attach the propeller blades and mount the cover
cap.
To replace the mixer shaft proceed as follows:
1. Dismantle the hub.
2. Dismantle the drive unit.
3. Replace the mixer shaft.
4. Mount the drive unit.
5. Install the hub.
▶ Mixer shaft is replaced. Install the mixer and put into service.
Additional information for the individual work steps:
▪ See "Replacing the hub [} 258]".
▪ See "Replacing the drive unit [} 259]".
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