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7.2 Fitting a replacement seal
Seals should only be replaced by trained supervisors or engineers. When the old seal has been
removed, the new seal is pressed into the circular groove. Pressure should first be applied to
the seal at the top of the chamber opening, and then at the bottom, whilst ensuring that both
sides of the seal are equidistant from the centre of the chamber. Then the two sides of the seal
should be pressed into the groove, whilst ensuring that the all parts of the seal are equidistant
from the centre of the chamber. Finally any excess seal should be pressed firmly in to the
groove.
Any attempt to fit the seal in one movement, or to stretch the seal, may result in a poor fit and
should be avoided. A poorly fitted seal can result in a malfunction when the door has been
closed.
Press the top of the seal into the seal groove, and then press
the bottom of the seal into the groove, ensuring that there
are equal amounts of excess seal at each of the two sides.
Press the left and the right hand sides into the groove,
ensuring that there are equal amounts of excess seal at each
of the four corners.
Fit the remaining excess seal into the groove by starting in
the centre of the excess sections at the four corners, and
then working outwards.
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