Chapter 4: Maintenance 57
Work carefully. The outer sleeve can fall off as you loosen the
retainer.
2. Remove the Bal seal by gripping it between your thumb and
index finger and pulling down.
3. Install the new Bal seal spring-side up.
Ensure that the sample tube O-ring is still in place inside the
retainer.
Retainer
Outer sleeve
Sample injection tube
Bal seal
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