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ISO PRO Centrifugal Pump
Section 7..........................................................Maintenance and Servicing
If spacer type coupling has been fitted between the pump and driver, the pump
casing can remain bolted to the suction and discharge pipes.
1. Remove the back plate to casing bolts. Jacking screw holes are provided in the back plate, to
facilitate removal of the bearing housing shaft element.
2. Unscrew the impeller nut and remove the Nord-lock washer. Screw the impeller nut back on the
shaft by hand and drive a pair of wooden wedges gently between the impeller and back plate, being
careful not to distort the impeller. Remove the impeller nut and lift off impeller. Lift out impeller key.
3. Remove the bearing housing to back plate bolts and remove the back plate.
Some pumps do not have separate bearing housing to back plate bolts and
these would have been removed in step (1).
4. Remove the bearing cover to bearing housing bolts. By tapping on the end of the shaft with a piece
of wood, the shaft, bearing assembly and bearing cover can be removed.
A pump which has become worn in the body or impeller may be repaired by fitting bronze wear rings.
These rings, with full instructions for machining the pump parts and fitting rings are obtainable from the
nearest Southern Cross Dealer.
7. RE-ASSEMBLY PROCEDURE
Re-assemble the pump by following the procedure below, paying particular attention to the following:
1. Ensure gasket surfaces are clean.
2. Ensure shaft seal is fitted according to manufacturer's instructions.
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