96 5977B Series MSD Troubleshooting and Maintenance Manual
4 General Maintenance
Maintaining the Vacuum System
Periodic maintenance
Some maintenance tasks for the vacuum system must be performed
periodically. (See Table 9 on page 91.) These include:
• Checking the foreline pump fluid (every week)
• Checking the calibration vial (every 6 months)
• Replacing the foreline pump oil (every 6 months; every 3 months for
CI MSDs using ammonia reagent gas, standard foreline pump)
• Tightening the foreline pump oil box screws (first oil change after
installation, standard foreline pump)
• Changing the foreline pump exhaust filters
• Replacing the DP fluid (once a year)
• Changing the dry foreline pump tip seal (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 Micro-Ion vacuum gauge should be performed only
when needed. (See “General Troubleshooting” on page 35.) Refer to the online
help in the 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. (See “Vacuum System” on page 153.)
Most of the procedures in this chapter are illustrated with video clips on the
5977B Series MSD User Information media.
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