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Chapter 7: Troubleshootin
6. When checking the sample valves, pull as much
vacuum as possible. If a vacuum indication is
displayed, wiggle or rotate the valves and watch the
gauge for any fluctuations. Fluctuations can
indicate a potential vacuum leak. If the valve seems
to be in good condition, remove the valve and apply
vacuum grease and reinstall the valve. DO NOT
APPLY VACUUM GREASE TO THE
GASKETS ON A COLLECTION CHAMBER
SAMPLE VALVE. If the valve still seems to be
the source of the problem, remove the valve and
stopper the hole with a rubber stopper. Continue
checking the other valves.
Thrust Washer
Valve Body
Knob & Stem
Assembl
Bulkhead Nut
Bulkhead
Fitting
Gasket
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