14. Dismantle the motor feet, if necessary:
Undo nuts (53) and bolts (52) and remove feet (51).
7.5
Reassembling the pump set
7.5.1 General information/Safety regulations
CAUTION
Improper reassembly
Damage to the pump!
▷
Reassemble the pump (set) in accordance with the general rules of sound
engineering practice.
▷
Use original spare parts only.
Always reassemble the pump in accordance with the corresponding general assembly
drawing or exploded view.
Always use new O-rings.
Never use O-rings that have been glued together from material sold by the metre.
Always use new gaskets, making sure that they have the same thickness as the old
ones.
Always fit gaskets of asbestos-free materials or graphite without using lubricants
(e.g. copper grease, graphite paste).
Avoid the use of assembly adhesives, if possible.
Match the lubricants to the fluid handled (e.g. water for foodstuff applications).
For reassembly, tighten all screws as specified in this manual.
Tightening torque of the impeller nut: 70-80 Nm
7.5.2 Reassembling the pump
7.5.2.1 Sizes 10/1 - 10/3, 20/1 - 20/3, 30/1 - 30/3
Reassembly is effected in reverse order to dismantling.
1. Carefully insert mating ring of mechanical seal (13) into pump casing (1).
2. Place joint ring (31) into pump casing (1) and connect pump casing to flange (49)
by tightening screws (39).
3. Pull splash guard (27) onto motor shaft (50).
4. Carefully pull pump casing (1) with flange (49) onto motor shaft (50) and bolt to
motor (55) using bolts (40) and washers (42).
5. Slide primary ring of mechanical seal (13) incl. spring onto shaft (50) until the two
mechanical seal assemblies abut each other.
6. Fit key (24) on shaft (50).
7. Slide first impeller (5) onto shaft (50) until it will not go any further, compressing
the spring of mechanical seal (13).
8. Place joint ring (30) and O-ring (16) into pump casing and fit first stage casing (3).
9. Repeat the above steps until all stages have been reassembled.
10. After the last impeller (5) has been fitted, screw on and tighten impeller nut (14).
11. Fit grub screws (36).
12. Fit joint ring (30) and O-ring (16) of the last stage and suction cover (7) (vertically
installed pumps: foot with suction cover (7)).
13. Fit washers (37) and lock suction cover (7) in position with cap nuts (38).
14. Before starting the pump, check that the impellers rotate easily.
Sequence
Sealing elements
Assembly adhesives
Tightening torques
7 Servicing/Maintenance
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Vitastage
