WARNING
Back pull-out unit tipping over
Risk of squashing hands and feet!
▷
Suspend or support the bearing bracket at the pump end.
1. If required, suspend or support bearing bracket 330 to prevent it from tipping
over.
2. Unbolt support foot 183 from the baseplate.
3. Undo nut 920.3 (with bolted-on discharge cover) or 920.5 (with clamped
discharge cover) at the volute casing.
4. Pull the back pull-out unit out of the volute casing.
5. Remove and dispose of gasket 400.1.
6. Place the back pull-out unit on a clean and level surface.
7.4.5 Dismantling the impeller
✓
The notes and steps stated in (
43) have been observed/carried out.
✓
The back pull-out unit is kept in a clean and level assembly area.
1. Undo impeller nut 920.1 (right-hand thread).
2. Remove impeller 230 with a puller.
3. Place impeller 230 on a clean and level surface.
4. Remove keys 940.2 from shaft 210.
7.4.6 Dismantling the shaft seal
7.4.6.1 Dismantling the mechanical seal
✓
The notes and steps stated in (
44) have been observed/carried out.
✓
The back pull-out unit is kept in a clean and level assembly area.
1. Remove the rotating part of the mechanical seal (spring-loaded ring) from shaft
sleeve 523.
2. Remove nuts 920.4 from discharge cover 163.2, if any.
3. Remove discharge cover 163.2 from bearing bracket 330.
4. Remove the stationary part of the mechanical seal (seat ring) from discharge
cover 163.2.
5. Pull shaft sleeve 523 off shaft 210.
6. Remove and dispose of gasket 400.3.
7.4.6.2 Dismantling the packed gland
✓
been observed/carried out.
✓
The back pull-out unit is kept in a clean and level assembly area.
1. Undo nuts 920.2 at the packed gland and loosen gland follower 452. Remove
nuts from discharge cover, if any.
2. Remove discharge cover 163.1 from bearing bracket 330.
3. Remove gland follower 452 from discharge cover 163.1 and remove the packing.
4. Remove stuffing box ring 454.
5. Remove packing rings 461 and lantern ring 458, if any.
6. Pull shaft protecting sleeve 524 off shaft 210.
7 Servicing/Maintenance
44 of 66
Etanorm
