I took a look in the service manual I got years ago and the only thing I can find is that there's a couple of pages of things that start with MP - in lists called Mechanical Parts, but this manual doesn't have an 853.? The highest it goes is MP851.
If you'll notice, there's no copper leading to or from the part in the picture, which implies it's not connected to anything electrically, so that goes with being a mechanical part.? More details, like what assembly that is or the parts around it to search for might help, but that's just guessing.?
The manual I have is dated 2005, so perhaps MP853 was added after this.?
That's not much, but it's the best I can do.
73,
Bob
--
W4ATM - 35 Miles south of the Kennedy Space Center
Retired RF Design Engineer
Now able to play with all the hobbies I never had enough time for
