Iam happy to hear something I added to the thread worked. good job Kurt.
After I Posted above about the 240D spedo quiting and up grading to the 100mph spedo from the 85 mph one. I stumbled across a 150mph spedo in a Euro 230E W123, with the 3:58 Diff. not a lot of these around, but have come across 4 of these in the past 2 yrs.
So I had the bright idea of putting this in the 240. now I have the illusion of going faster
. also installed the 3:58, and is a 3% difference from the 3:69.
I have one important comment to make about installing the number wheels back on the shaft. the shaft with the brass gear.
Make sure the numbers line up with the window on the spedo face. this spedo gave me fits getting the numbers lined up and the grey cogs in the proper place. had it apart 4 times or so. finally get the final gear on, tap on the brass bushings and the dab of Super Glue.
Put the face on, and realize the numbers are too low. only half of the numbers show in the window
.
So maybe place the face on before you drive everything back on nice and tight as you are assembling the darn thing.
Even after I knurled the shaft with the Vice Grips, the pot metal gear didn`t seem to fit tight enough. so I used a gear from another spedo. It might be the thing had been slipping on the shaft for so long, the hole wore enough not to fit tight.
After taking a few of these w123 spedo`s apart, they really are not all that mysterious and difficult to R&R.
Charlie