Maintenance and repair
en
Installation and operating instructions Wilo-Vardo WEEDLESS-F
35
8
9
1
10
4
Fig. 14: Mounting the stretching device
1
Mixer shaft
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.
9.6.5
Replacing the mixer shaft
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:
ƒ
See “Replacing the hub [
}
34]”.
ƒ
See “Replacing the drive unit [
}
35]”.
9.6.6
Replacing the drive unit
Removing the mixer shaft from the drive unit
1
2
1
4
5
6
Fig. 15: Removing the mixer shaft
1
Mixer shaft
2
Shrink disc
3
Output shaft
4
Drive unit
5
Grub screw
6
Hexagon head screw
‡
Propeller blades are removed. See “Attaching the propeller blades [
}
18]”.
‡
Cover cap is removed. See “Mounting the cover cap [
}
21]”.
‡
Align mixer shaft and drive unit horizontally: Position scantlings under the mixer
shaft and drive unit.
WARNING! Risk of crushing! Prop up the mixer and drive
unit in such a way that they will not tip over when dismantled!
1. Unscrew the grub screw.
2. Loosen the hexagon head screws on the shrink disc.
3. Remove the mixer shaft from the output shaft.
4. Remove the shrink disc from the mixer shaft.
