Installation manual

General Maintenance 5
5975 Series MSD Operation Manual 133
Maintaining the Vacuum System
Periodic maintenance
As listed earlier in Table 21, 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)
• Ballasting the foreline pump (daily in MSDs using ammonia reagent gas)
• 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 (typically every 3 years)
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 5975 Series MSD
Troubleshooting and Maintenance manual and see the online help in the MSD
ChemStation 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 5975 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
5975 Series MSD User Information disks.