Waters Xevo TQD Operator's, Overview And Maintenance Manual page 132

3. Use the 3-mm Allen wrench to unscrew and remove the 4 screws
securing the PEEK ion block support to the adaptor housing, and
remove the ion block support.
Securing screws
4. If any of the O-rings show signs of deterioration or damage, dispose of
them in accordance with local environmental regulations.
4-56 Maintenance Procedures
PEEK ion block
support
The O-rings can be contaminated with
Warning:
biohazardous and/or toxic materials. Dispose of them
according to local environmental regulations.
Adaptor housing
Ion guide
assembly