7. Fit service tool D in the hole marked "Dismantling". See the
figure below.
TM071778
Locking the shaft in service tool H2
8. Continue to the section on dismantling the chamber stack.
Related information
3.1.1 Removal
3.3 Thrust-handling device
4.1.3 Dismantling the chamber stack
7.3.1 Special tools
4.1.3
Dismantling the chamber stack
Preparations
Removing the chamber stack requires that the pump has been
dismantled as described in the section on removal of the motor and
coupling and the section on shaft seal, motor stool, pump head
cover, sleeve and chamber stack
Dismantling the chamber stack also requires that it is mounted in
service tool H1 or H2 as described in the sections on servicing the
chamber stack in service tool for vice mounting or servicing the
chamber stack in service tool for pump base mounting.
Procedure
1. Loosen the screws (26 b) and remove the straps (26a).
2. Remove the top chamber (3 or 3a).
3. Loosen the split-cone nut (48) using service tool C, but leave it
so that it is still engaged with a few turns of thread on the
impeller (49 or 49a).
4. Install service tool I on top of the pump shaft (51) to protect the
shaft recess. Note that this applies only if the top of the pump
shaft has a reduced diameter compared to the rest of the shaft.
5. For pumps with ∅22 pump shaft: Turn service tool C around
and knock it against the split-cone nut (48) to loosen the
impeller (49 or 49a) from the split-cone (49b). See the figure
below.
TM071779
Loosening the impeller (49 or 49a) with service tool C
6. For pumps with ∅28 or ∅36 pump shaft: Insert service tool
M on top of the split-cone nut (48) and use a hammer to knock
service tool Q against the split-cone nut (48) to loosen the
impeller (49 or 49a) from the split cone (49b). See the figure
below.
TM071780
Loosening the impeller (49 or 49a) with service tool Q
7. Remove the split-cone nut (48), split cone (49b) and impeller (49
or 49a).
14
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