17. Check that the height X is maximum 71 mm. See the figure
below.
If the measured height is not within the specifications, the pump
has not been assembled correctly, and the pump must be
dismantled to find the reason.
TM070969
X: 69 ± 2 mm
Note that the below text applies only for pumps with motor sizes
75 to 200 kW (100-300 hp) and fitted with a thrust-handling
device.
During assembly of the pump, there is a risk that the O-ring
(120i) causes the stationary ring (120g) to stick. As a result, the
entire chamber stack will not be fully seated inside the pump.
This can lead to malfunction and eventually damage to the
pump if it is started. See the figure below.
TM083369
Before making the shaft height adjustment, make sure the shaft
with impellers is placed as much downwards as possible inside
the pump. This can be checked by rotating the shaft by means
of a screwdriver inserted in the cross-hole at the top of the shaft.
TM083256
• If the friction is with high scattering or peaks caused by the
axial metal-to-metal contact between impeller and chamber,
then the shaft with impellers is positioned correctly and you
can go on with the shaft height adjustment using the
adjustment fork.
• If rotating freely with very little friction, try rotating CCW and
CW until the shaft binds and you feel the metallic contact
between the chambers and impellers.
• If you cannot feel the metallic contact between the chambers
and impellers, the pump must be disassembled, and the
stationary ring (120g) must be pressed fully down in the
pump base so that it is seated completely against the lifting
plate (120h) and the flange (120k).
18. Install the cylindrical pin (10) in the pump shaft (51).
19. Install the coupling halves (10a).
20. Lubricate and tighten the screws (9), but leave loose. See the
section on lubricants.
21. Check that the gaps on either side of the coupling halves are
equal. See the figure below.
TM071744
Gap between coupling halves
22. Tighten the three set screws (113) to the specified torque. See
the section on torques.
23. Lift the pump shaft with a crowbar and insert the adjusting fork
F. See the figure below.
TM070868
Lifting pump shaft and fitting adjusting fork.
24. Cross-tighten the screws (9) to the specified torque. See the
section on torques.
9
English (GB)
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