How to Remove the Left Platen Knob on a Smith-Corona 5-Series Floating Shift

How to Remove the Left Platen Knob on a Smith-Corona 5-Series Floating Shift

A TCL friend asked if I had a left platen knob for an SCM 5-Series in my spare parts, and it happened I did, but it was not especially clear to me how to remove it from my parts machine – even after consulting the service manual. It told me to remove certain screws, but it was not made clear how, or what they looked like. I puzzled it out, though, and documented it:

Step 1: (see above) hold onto the variable knob (chromed conical knob) with something like the inner round part of a set of needle nose pliers while turning the inner nut clockwise with a 3/16″ wrench until knob unscrews off.

Step 2: Use 3/16″ wrench to remove nut (counterclockwise). Hold the other end of the variable shaft to prevent it from turning.

Step 3: With nut & knob removed, pull out variable shaft.

Step 4: With shaft removed, use flathead screwdriver to turn shaft collar screw counterclockwise to loosen and remove. Pull off the retaining collar and pull left knob out of assembly.

Step 5: If you’re sending the knob to someone, re-assemble the assembly so they have all the parts. Enjoy! (:

Updated: September 6, 2021 — 11:08 pm

11 Comments

Add a Comment
  1. I love that kind of blog articles. Good information! Thank you from Germany.

  2. Hello Ted,

    Not really the place to ask but i’m desperate!.. i’m looking for a drive belt for the SMC poweriter.. i don’t think there is any left..

    So..yes; i finally found a Poweriter that is in REALLY good condition: with the original powerbank, the original ‘changeble keys’ box (complete!) the original enveloppe with all the original papers etc. It works (yes: also on 220V!).. so happy.. but no belt..no typing.

    hope to hear, i posted this also on Typepals forum.

    Greetings!
    Indro

      1. thnx Ted, I think i need a toothed 20 inch drive belt?, so one pretty big toothed (and flat and wide) belt. i cant find a picture of it on the web but i’ll try to look one up

        1. oh, then I dunno. sounds like unobtainium, but you might try the GolfBallTypewriterShop Facebook group.

  3. Hi Ted,
    Any idea on where to source a replacement left polished conical knob/nut like the one in your above photos? I recently acquired a 5TE that is missing that.

    Thanks!

    1. only off another machine, and I already gave that one away.

  4. Hi Ted – I’m looking for that platen variable knob (Dome Shaped) would you happen to have a spare you can sell?

    1. Already gave it away. Sorry (:

      1. Thanks for replying. Do let me know if you encounter a parts unit with this still intact!:)

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

To respond on your own website, enter the URL of your response which should contain a link to this post's permalink URL. Your response will then appear (possibly after moderation) on this page. Want to update or remove your response? Update or delete your post and re-enter your post's URL again. (Find out more about Webmentions.)