136 | Chapter 4: Preventive Maintenance
Replace Components
Replacing the O-Rings and Channel-End Seals
For optimal performance and to extend the life of the washer, replace the manifold
o-rings once a year and replace the 12 (or 24) rubber plugs (seals) on the channel
ends if they show signs of cracking or drying out. Order the replacement o-rings
and seals from Bio-Tek (see page 104).
You must remove the manifold to change the seals, so these tasks work best in
conjunction with the
Cleaning the Manifold, Mist Shield, and Tubing
procedure on page 118.
Replacing the O-Rings
After completing Step 9 of the procedure on page 119:
1. Using your fingers or an appropriate tool, such as a very small, flat
screwdriver, remove the two o-rings that are exposed when the
manifold is removed.
2. Replace the used o-rings with new ones by fitting them into the
grooved slots.
3. If you are not replacing the channel end-seals at this time, reinstall the
manifold.
Do not overtighten the manifold screws.
Caution: When reinstalling the manifold, only tighten the
screw-washer-spring assembly that holds it in place until you
feel the mechanical stop. You will damage the instrument if
you continue tightening past this point.
Replacing/Cleaning the Channel-End Seals
Cleaning or replacing the channel-end seals is most easily and efficiently
accomplished in conjunction with
Cleaning the Manifold, Mist Shield, and
Tubing
procedure on page 118. If the channel-end seals do not need to be
replaced, they should be washed with mild detergent or alcohol.
1. If you haven’t already done so, remove the manifold end plate to access
the channel-end seals as described in Step 7 on page 119, when
removing the manifold(s). See
Figure 29 on the following page.
Bio-Tek Instruments, Inc.
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