7 Servicing/Maintenance
42 of 64
Etaline
5. Tighten hexagon head bolts 901.50.
6. Undo socket head cap screw 914.24.
7. Remove the motor.
7.4.5 Removing the back pull-out unit
WARNING
Back pull-out unit tilting
Risk of squashing hands and feet!
▷ Suspend or support the back pull-out unit at the pump end.
ü The notes and steps stated in (ðSection7.4.1,Page40) to
(ðSection7.4.4,Page41) have been observed/carried out.
1. If required, suspend or support the back pull-out unit to prevent it from tipping
over.
2. Undo hexagon nut 920.15 (on variant with bolted discharge cover) or 920.01 (on
variant with clamped discharge cover) at the volute casing.
3. Pull the back pull-out unit out of the volute casing.
4. Remove and dispose of gasket 400.10.
5. Place the back pull-out unit on a clean and level surface.
7.4.6 Removing the impeller
ü The notes and steps stated in (ðSection7.4.1,Page40) to
(ðSection7.4.5,Page42) have been observed/carried out.
ü The back pull-out unit has been placed in a clean and level assembly area.
1. Undo impeller nut 920.95 (right-hand thread).
Take washer 930.95 and disc 550.95 off the impeller hub.
2. Remove impeller 230 with an impeller removal tool.
3. Place impeller 230 on a clean and level surface.
4. Remove key 940.01 from shaft 210.
7.4.7 Removing the mechanical seal
ü The notes and steps stated in (ðSection7.4.1,Page40) to
(ðSection7.4.6,Page42) have been observed/carried out.
ü The back pull-out unit has been placed in a clean and level assembly area.
1. Remove shaft sleeve 523 with the rotating assembly of the mechanical seal
(primary ring) from shaft 210.
2. Remove the rotating assembly of the mechanical seal (primary ring) from shaft
sleeve 523.
3. Undo hexagon nuts 920.15 and socket head cap screw 914.22, if any, on drive
lantern 341.
4. Remove casing cover 161 from drive lantern 341.
5. Remove the stationary assembly of the mechanical seal (mating ring) from
casing cover 161.
6. Remove and dispose of gasket 400.75.
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