Valve plate, fixing plate
If the valve plate and fixing plate are hard to remove, slightly heat the fixing plate and then remove them.
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While being careful not to get burned, apply hot air from a distance of 3 to 10cm.
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If it is hard to remove the valve plate and fixing plate even after heating because they are stuck to the pump head, insert a stick-shaped (not sharp) object from the hole of the exhaust filter to remove. (See the following photo.)
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