ASP STERRAD 100, Service Manual, Page: 94 / 309

Removal/Replacement Procedures
The procedure below details replacing the entire vacuum pump and its
subassemblies. Each subsection can be used alone if only a single
component is being replaced. The numbers in the diagram below match
the steps of the removal procedures.
Pre-Removal Procedures
Perform the following steps prior to removing any part of the vacuum
subsystem.
1. Remove any vacuum from the chamber.
2. Turn off the power to the system.
3. Drain the oil from the pump using the oil draining procedures in the
Planned Maintenance section. Do not replace the oil at this time.
Remove the Bellows
1. Remove the KF clamps at the top and bottom of the bellows.
2. Squeeze the bellows together (use your hands) and remove them.
3. Remove the centering rings. Remove the elbow if applicable.
Remove the Throttle Valve
The throttle valve assembly contains the vent valve assembly, the HEPA
filter, and the vacuum switch assembly. Each of these is a field
replaceable unit. Click on the one you want to remove.
To remove the throttle valve itself, unfasten the KF clamp between the
throttle valve and the intake filter assembly taking care not to damage or
lose the centering O-ring.
Remove the Vacuum Switch
4. Disconnect the throttle valve wiring harness. Using two wrenches,
unfasten the VCO connector holding the vacuum switch assembly to
the throttle valve assembly. Remove by hand taking care not to lose
or damage the O-ring inside the vacuum switch.
Vacuum Subsystem Removal/Replacement Procedures
4-8 STERRAD® 100 Sterilizer ASP Service Guide rev. D