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| Check that preload between panel seal -2- and body is uniform all-round using a 0.3 mm thin strip of card (e.g. business card). It must be possible to pull the paper strip through between the panel seal and body under load. |
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| If the preload is insufficient, the panel seal can be spread apart using a wedge -1-, or if the preload is excessive it can be pushed together. To adjust the panel seal the glass panel -3- must be removed. |
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