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Assembly and installation manual
QIM/QDB Mixer Series
QIM/QDB-M01
3. SPACING OF THE IMPELLER AND STUB SHAFT
The correct functioning of the pump depends on the separation of the impeller (2S) from
the backplate (11A) and the fixation of the stub shaft (6P) on the motor shaft. Follow the
next steps to fix the stub shaft on the motor shaft:
3a. Position the stub shaft collar (92) with the corresponding Allen screws (92A) loosely
on the stub shaft and place it on the motor shaft, it must slide in and out without problem.
Figure D.
3b. Place and fix the backplate into the adapter. Two long pins are used in the adapter
(71A) normally preassembled; if there are no pins please insert them into the holes drilled
in the adapter ring. Those pins help to fix the backplate into the adapter using two bended
backplate pins (11F). The bended pins shall be clockwise seeing them from the back side
of the backplate.
Seat the backplate on the adapter and turn it counterclockwise until the bended pins
engage with the long pins. If the bended pins get separated or they do not mate with the
long pins, try to adjust them by turning in or out. Figure E.
The bended pins help to keep the backplate in position to make the assembly easier.
Figure D.
Figure E.
A
SS
EM
B
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