3.
MAINTENANCE
IOM manual CTI & CTH centrifugal pumps
17
3.3.
Disassembly of the pump
The disassembly should be performed only by qualified personnel.
Each operation to be fulfilled with the machine must always be carried out once all the
electrical contacts have been disconnected. The pump-motor unit must be placed in a
position where it cannot be started unintentionally.
Before servicing in any way the parts that come in contact with the pumped liquid, make
sure that the pump has been fully emptied and washed. When draining the liquid, make
sure that there is no danger for people or the environment.
The numbers put in brackets, refer to the part numbers in the spare part drawings and spare
part lists in chapter 4 “Spare parts”.
3.3.1.
Disassembly procedure
Fig. 3.3.1
Unscrew the casing mounting screws [141] and
remove them with the nuts [143] and washers [142].
Fig. 3.3.2
Take off the pump casing [13].
Fig. 3.3.3
Remove the O-ring [18].
NOTE! After every disassembly the O-ring [18] has
to be replaced by a new one.
Fig. 3.3.4
Remove the impeller mounting screw [191] and the
washer [192], use a spanner key in the opening of the
pump back cover [11] to hold the shaft [16] during
assembly and disassembly of the impeller. Remove
the impeller.
