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Technical Model A Broken Latch Spring Fix

Discussion in 'The Hokey Ass Message Board' started by Ebbsspeed, Oct 24, 2022.

  1. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,488

    Ebbsspeed
    ALLIANCE MEMBER

    A couple weeks ago I started a thread about the broken latch springs in my Model A, and where I might be able to get replacements. I was able to source a couple of the handle return springs, but struck out on the latch return springs. I'm sure someone out there has them, but I came up with a fix that I believe will work as good as the originals. While I was at it, I addressed a couple of worn areas on the latches.

    Here's one of the broken latch return springs, for which I couldn't find replacements.

    1.jpg


    And one of the new handle return springs that I did get from a member of the local Model A club. Thanks Dan McFarland!

    2.jpg


    A photo of the new handle return spring, installed.

    3.jpg


    The latch pins were well worn at the pivot locations.....

    4.jpg

    ...and the holes in the latches and latch bodies were worn oblong.

    5.jpg 6.jpg


    There was also some significant wear on the latches where they contact the striker, from lots of years of body flex rubbing the two components together.

    7.jpg


    A quick touch of the MIG to the worn area built it up nicely. I'll blend the surface with the grinder later.

    8.jpg

    Since the holes in the latch and latch body were worn oblong, I decided that an overbore and new pins was in order. I can now honestly say my Model A has a 0.0625 overbore.

    9.jpg

    A spring is a spring, and you can turn a "stretchy" spring..... 10.jpg


    ....into a "torsion" spring. It just takes a little bending.

    11.jpg


    The hardest part of the whole process was getting the spring, pin, latch and latch body to all line up for re***embly.

    12.jpg


    It all works real well, and took just over an hour to rebuild both of the latches. Here's a video link after it's all ***embled.

    https://www.youtube.com/shorts/P9qJLqrmIFg
     

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    Last edited: Oct 24, 2022
  2. Flathead Freddie
    Joined: May 9, 2021
    Posts: 806

    Flathead Freddie
    Member

    you did a fantastic rebuild it really keeps the integrity of the ***embly . A suggestion you can also harden the ends of the pins and the pin boss area so it will last another century .
    The question I have for you is :
    Is the door handle action REALLY as factory new ? Really it's an honest question these things do matter .
     
  3. woodiewagon46
    Joined: Mar 14, 2013
    Posts: 2,532

    woodiewagon46
    Member
    from New York

    You did a great job of restoring your lock but Bratton's Antique Auto Parts, 800-255-1929 has every part you need to restore the locks. The complete spring set is $15.00, PN 32060.
     
  4. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,488

    Ebbsspeed
    ALLIANCE MEMBER

    I can't honestly answer that because I've never been near a factory new Model A. The newest ones are 23 years older than I am.

    BUT, there is no play anywhere in these except for the very slight wear on the square handle shaft where it engages the rotary "thing" that operates the latch. I'd guess it's quite close to how they were when they rolled out the factory door.
     
    Flathead Freddie and Happydaze like this.
  5. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,488

    Ebbsspeed
    ALLIANCE MEMBER

    All of the major suppliers, including Brattons, do not have these springs, nor do they have window regulator springs. Most of them tell me they are "on national backorder" and have been for a year or so. The only ones I've been able to find have been in peoples personal stashes.

    Brattons.JPG
     
    Last edited: Oct 25, 2022
    Flathead Freddie likes this.
  6. Flathead Freddie
    Joined: May 9, 2021
    Posts: 806

    Flathead Freddie
    Member

    That is quite believable as I am finding I also am now producing my own pieces of ***emblies not available and that includes alot of carburator parts I am astonished because you do see a slew of websites of every car variety that site says they have and and they have not , so I find I am buying lots of original ***emblies to make it worthwhile to build what I need and put a couple away for future car builds
     
  7. David Gersic
    Joined: Feb 15, 2015
    Posts: 2,814

    David Gersic
    Member
    from DeKalb, IL

    You have a good sample to work with, that’s a start. You could contact Vodvarka Springs. I’ve worked with them to reproduce unobtanium springs before. You might have to buy a dozen to make it worth their setup time, but they’re nice to work with.
     
    Flathead Freddie likes this.
  8. 31Apickup
    Joined: Nov 8, 2005
    Posts: 3,639

    31Apickup
    Member

    I was able to get those thru CW Moss antique Ford parts last year, as Bratton’s and Snyder’s were out of stock.
     
    Last edited: Oct 25, 2022
  9. 325w
    Joined: Feb 18, 2008
    Posts: 6,508

    325w
    ALLIANCE MEMBER

    Maybe check over at the Ford barn
     

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