General Maintenance 5
5977 Series MSD Operation Manual 125
Maintaining the Vacuum System
Periodic maintenance
As listed earlier in Table 21 on page 120, some maintenance tasks for the
vacuum system must be performed periodically. These include:
• Checking the foreline pump fluid (every week)
• Checking the calibration vial(s) (every 6 months)
• Replacing the foreline pump oil (every 6 months; every 3 months for CI
MSDs using ammonia reagent gas)
• Tightening the foreline pump oil box screws (first oil change after
installation)
• Replacing the diffusion pump fluid (once a year)
• Replacing the dry foreline pump seals (once a year)
Failure to perform these tasks as scheduled can result in decreased
instrument performance. It can also result in damage to your instrument.
Other procedures
Tasks such as replacing a foreline vacuum gauge or Micro-Ion vacuum gauge
should be performed only when needed. See the 5977 Series MSD
Troubleshooting and Maintenance manual and see the online help in
MassHunter Data Acquisition software for symptoms that indicate this type of
maintenance is required.
More information is available
If you need more information about the locations or functions of vacuum
system components, see the 5977 Series MSD Troubleshooting and
Maintenance manual.
Most of the procedures in this chapter are illustrated with video clips on the
Agilent GC/GCMSD Hardware User Information & Instrument Utilities and
5977 Series MSD User Information disks.
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