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Jet Assemblies
The jet assemblies of each of the pumps are discussed
and shown in the following subsections. Procedures and
drawings are specific to each pump model.
HS-16 Jet Assembly
Figure 24 HS-16 Jet Assembly
High Throughput Diffusion Pumps
44
To disassemble the jet assembly:
1. Remove the cold cap or halo baffle as described in
"Cold Cap" on page 43.
2. Unscrew the top cap from its coupling and remove it.
3. Remove the top plug.
4. Remove the drip shield that sits loosely on the 2nd
stage.
5. Lift and remove the entire 2nd stage.
6. Lift and individually remove the 3rd stage, the 4th
stage, and the jet base.
7. Remove the two nuts securing the splash baffle, then
lift and remove the splash baffle.
8. Remove the jam nut located at the center-bottom of
the pump in order to remove the jet rod.
To assemble the jet assembly:
❑
Reverse the disassembly steps above.
NOTE
When the jet assembly is installed in
the pump body, be sure that the slot in
the jet base is engaged in the locating
pin of the boiler. Unless this is done, the
pump will not function properly.
NOTE
If the jet coupling loosens from the jet
rod during disassembly, position it so
that the top of the jet coupling is flush
with the bottom orifice plug as can be
seen in Figure 26.
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