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11. Installing the new TW300
Place the protective net and the o-ring in the new TW300. Make sure that there is no dust on
sealing surface, o-ring and protective net. Make sure that there are no dust and no scratches on sealing
surface of vacuum manifold
Put cardboard on the power unit of turbomoecular pump.
Reinstall TW300 in a reverse way of removal. Pay attention not to hit against the IG gauge.