Johnson Pump SPX Flow CombiBlocHorti Series, Instruction Manual

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34 Disassembly and assembly
CL-CBH/EN (1901) 7.6
7.3 Disassembly
7.3.1 Disconnecting the motor
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Make sure that the electricity supply to the pump has been disconnected
and that the pump cannot be switched on by others!
1 Open the cover of the terminal box on the motor.
2 Loosen the supply wires. Mark the wires and the corresponding terminals for later
reconnection.
7.3.2 Removing the pump
In case the complete pump must be removed:
1 Disconnect the electric motor, see paragraph 7.3.1 "Disconnecting the motor".
2 Loosen the bolts of the connection flanges.
3 For CBH: Loosen the fixation bolts of the pump feet.
4 Remove the pump from the piping.
7.4 Replacing the wear ring CBH
7.4.1 Disassembly
After removing the Back-Pull-Out unit the wear ring can be removed. In most cases the
ring has been fixed so tightly that it cannot be removed undamaged.
1 Measure the thickness (d) and the width (b) of the ring, see figure 4 A.
2 Make a centre hole in the middle of the edge of the ring at two opposite points, see
figure 4 B.
3 Use a drill with a diameter just a little bit smaller than the thickness (d) of the ring and
drill two holes in the ring, see figure 4 C. Don't drill deeper than the width (b) of the
ring. Take care not to damage the fitting edge of the pump casing.
4 Use a chisel to cut the remaining part of the ring thickness. Now you can remove the
ring in two parts from the pump casing, see figure 4 D.
5 Clean the pump casing and carefully remove all bore dust and metal splinters.
Figure 4: Removal of wear ring.
A
B
C
D
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b
d