In case of double suction pump (DMXD and
DMXDH), remove crossover bushing [1600].
Crossover bushing is horizontally split and held
together by dowel pins [6810].
ring at each impeller. Channel rings are
horizontally split and are held together by
shoulder screws or dowel pins.
Channel rings are precision machined as a
set, after being dowelled. They should be match
marked and numbered for reassembly purposes. It is
suggested that the two halves be placed back
to back) impellers. Center bushing is horizontally
split and held together by socket head cap-
screws [6570] and dowel pins [6810].
sleeve has a shrunk fit to the shaft and will have
to be heated to remove. Heat throttling sleeves
O.D. evenly throughout its length to
outboard impeller [2200], split ring [2531] and
When heating parts, gloves or other suitable
After impeller is heated, it will have to be pushed
towards the center of the pump, the split rings [2531]
removed and quickly pulled from the end of the shaft.
The shaft is step machined at each impeller
fit to ease the disassembly process. It is
recommended that each impeller be marked with
stage number to insure proper reassembly.
38 mm (1.5 in.)] of impeller until temperature
heat down through the vane passages, thus
additional heat may be necessary. This heating
should be started at the periphery of the impeller,
not the hub. (Additional heating of the hub area at
this time will tighten the impeller on the shaft, not
loosen it). If the impeller still fails to come free,
the impeller and shaft should be allowed to cool
completely and the heating process repeated,
Heating impeller for removal
on the outboard impellers.
removed on the outboard impellers.
Let entire rotor cool after removing several
components with heat as there may be a build-up of
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