Disassembly; Disassembling The Back-Pull-Out Unit; Assembling The Back-Pull-Out Unit - Johnson Pump SPX Flow CombiLineBloc Instruction Manual

7.3
7.3.1
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7.3.2
34

Disassembly

Disassembling the Back-Pull-Out unit

NEVER start dismantling by loosening the motor bolts (0850) and nuts (0900).
This may result in irrepairable damage to the mechanical seal and the
impeller!
1 Loosen the fastening nuts (0810) of the lantern piece, see figure 6.
If the pump is still in the piping, start from the bottom side and proceed along the two
sides upward, see figure 7.
2 Pull the motor together with the entire lantern piece out of the pump casing. The
Back-Pull-Out unit large pumps is very heavy. Support it with a beam or hang it in a
pulley sling.!
0850
0810 0800
0100
Figure 6: Disassembling the Back-Pull-Out unit.
Figure 7: Sequence of loosening the lantern piece fastening nuts.

Assembling the Back-Pull-Out unit

1 Grease the outer edge of the impeller entry with Molycote 107.
2 Fit the O-ring (0300) or a new gasket (0300).
3 Mount the complete lantern piece with motor back into the pump casing.
4 Fit the nuts (0810) and tighten them crosswise with the proper tightening torque. See
paragraph 10.2.1 "Tightening moments for bolts and nuts".
Disassembly and assembly
0900
CLB/EN (1901) 6.6