5 General Maintenance
116 5975/5977 Series MSD Operating Manual
Maintaining the Vacuum System
Periodic maintenance
Some maintenance tasks for the vacuum system must be performed
periodically. (See Table 15 on page 112.) These include:
• Checking the foreline pump fluid (every week)
• Replacing the tipseal (annually)
• Checking for leaks (every month)
• 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. Refer to the Agilent 5977B Series MSD
Troubleshooting and Maintenance manual and the online help in Agilent
MassHunter GC/MS 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, refer to the Agilent 5977B Series MSD Troubleshooting and
Maintenance manual.
Most of the procedures in this chapter are illustrated with video clips on the
Agilent GC and GC/MS User Manuals and Tools DVD set.
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