How to remove the diaphragm and non chill rim of the MDF triple seven stethoscope and then I'm going to show you how to put them back on. The lady is pushing down on the chest piece and away from the diaphragm and working her fingers all the way around it so that the plastic slips down and then she is able to pull it off the chest piece quite easily. So, when I had a go at removing the diaphragm, I did it with difficulty. I found that the plastic was a lot harder than it looks and I attempted to roll it off like in the video but it wouldn't budge at all and I tried to pry it open with my nails, but ended up nearly breaking all of them and also I found that I may have given it a little small scratches there, which is not very good. Then I also actually tried to pry it open with a sharp object, but then I stopped that because I didn't want to damage the chest piece. So, then I got some help from stronger hands and even then it was difficult to try and remove.
The plastic wouldn't budge at all. So, we tried to use a cotton cloth to get a better grip and even still it was really hard to remove, but then finally with lots of force we got the diaphragm off. Putting the diaphragm back on is a different story. When I did it, I put the diaphragm on the edge of the chest piece and then from there I worked my fingers all the way around until it snapped into place. It was quite easy and pain free. Removing the non chill rim. The plastic seemed pretty soft and I just pushed it all the way down, all the way around and then I could pull it off the chest piece. It was quite easy. Putting the non chill rim back onto the stethoscope, as you can see here, you've got to work your way in reverse. So, you push the plastic onto the chest piece all the way down and then you pull it back up over the edges and work your fingers all the way around until it fits snugly again. So, here in my attempt to put the non chill rim back onto this stethoscope, I did pretty much the same thing she did in that video, I pushed the plastic down and then all the way around the chest piece and then I pulled it back up to fit it snug all the way around the chest piece. It was quite easy. So, to summarize, the non chill rim was easy to remove and to put back on, no problems there. However the diaphragm was really hard to get off. The plastic was super hard. I nearly broke all my nails and I actually had to go and get a pair of stronger hands to help me out with that one. Now, the reason I do want to be able to take off the diaphragm is if I do want to do a thorough clean underneath and all the way in those crevices, or if my diaphragm is damaged in any way and I need to change it.
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