Johnson Pump SPX Flow CombiBlocHorti Series, Instruction Manual

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36 Disassembly and assembly
CL-CBH/EN (1901) 7.6
1 Loosen the fastening nuts (0810) of the lantern piece, see figure 5.
If the pump is still in the piping, start from the bottom side and proceed along the two
sides upward, see figure 6.
2 Pull the Pull-out unit straight out of the pump casing (0100).
7.5.2 Impeller
➢
If you wish to replace the impeller it is advisable to also replace the mechanical seal and
the bearings.
1 Place the Pull-out unit vertically and let it rest on the electric motor (2420).
2 Block the impeller (0120) against rotating, see figure 7.
3 Loosen the cap nut (1820).
4 Remove the impeller with a pulley puller. The position of the puller’s jaws should as
much as possible coincide with the blades.
5 If provided with shaft sleeve, remove the O-ring (1320) from the impeller hub for
inspection. Do not use a sharp tool!
Figure 6: Sequence of loosening the lantern piece fastening nuts.
Figure 7: Loosening the cap nut.
3
1 2
4
6
8
7
5
4021
4002