7. Turn the top back in. Make sure the flat cable does not get stuck or squeezed between
the top and the funnel f
or the flat cable and it is properly connected.
8. If the O-rings are damaged, replace them with new ones.
9. Tighten the fixing screws.
To make sure that the radiation shield stays straight, do not tighten the screws all the
wa
y in one go. Do not overtighten.
Chapter 9 – Maintenance
149
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