Philips AVENT SCF334 Manual page 13

2 Insert the white valve into the pump body from underneath. Push the
valve in as far as possible.
3 Screw the pump body clockwise onto the bottle until it is securely fixed.
4 Insert the silicone diaphragm into the pump body from above.
Make sure it fits securely around the rim by pressing down with your
fingers to ensure a perfect seal.
5 Insert the massage cushion into the funnel-shaped section of the
pump body.
6 Push in the inner part of the massage cushion as far as possible and
make sure that it is perfectly sealed all around the rim of the pump body.
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