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Thread: WANTED: M756A2 Trunnion

  1. #11
    4 Star General Steel Soldiers Vendor Evil Dr. Porkchop's Avatar
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    Here are some better pics of a trunnion. This one is Fredo's.
    IMG_2396.jpgIMG_2395.jpgIMG_2394.jpgIMG_2401.jpgIMG_2400.jpgIMG_2399.jpgIMG_2398.jpgIMG_2397.jpg
    m151a2, m1028s, m59 dump truck, LCVP, m416, m104, m101a3
    Stencils for sale!

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  3. #12
    Administrator steelsoldiers's Avatar
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    Quote Originally Posted by Neophyte View Post
    If you can get a picture, dimensions.....Iíll draw up a CAD file and make you one. I own a CNC I use to make ďunobtaniumĒ parts for refurbishing old ďtoysĒ....like our trucks. This site is a wonderful resource for us all....I can give back a little in this way.

    Bob
    Thatís fantastic! Thanks, Bob!
    Chris Stansbury, founder of Chris' CUCV Homepage in 1998 and Steel Soldiers in 1999.

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  4. #13
    Administrator steelsoldiers's Avatar
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    Quote Originally Posted by Evil Dr. Porkchop View Post
    Here are some better pics of a trunnion. This one is Fredo's.
    Thank you!
    Chris Stansbury, founder of Chris' CUCV Homepage in 1998 and Steel Soldiers in 1999.

    Current:
    1962 Dodge M37B1

    Gone, but not forgotten:
    M1009, M35A2, M1009, M561, 404 Mog, M818, M923A2, M931A1, M1008, M925A2, M998

    HUGE M925A2 Build Thread: https://bit.ly/2uPlSnZ

    HUGE M923A2 Build Thread: https://bit.ly/2uO2g3K

    Father, lead me, 'cause I can't do this alone.

  5. #14
    Colonel Neophyte's Avatar
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    If you could get close dimensions, I’ll be able to machine it within spec.

    Journal Diameters?

    Journal “stop” or ridge diameter and width?

    Key width and height on journal?

    Overall Length ? (Looks like a little over 12”)

    Through hole diameter?

    Wall thickness of cavity? (Through hole material....looks like 3/4”....and then thickness of bottom of cavity to outer spherical diameter).

    Any of the features tight tolerance? If you can show it’s application (picture of trunion in use/how it’s attached and used in operation)....it would help on this.

    Any idea on material? Looks like this is a cast or forged part (May need to heat treat steel after machining if forged).

    Bob
    1970 M817
    1983 M925
    2 MEP002A
    2 M116A2
    M105A2

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    Evil Dr. Porkchop (01-04-2019), gimpyrobb (01-04-2019), jasonjc (01-04-2019), steelsoldiers (01-04-2019)

  7. #15
    4 Star General Steel Soldiers Vendor Evil Dr. Porkchop's Avatar
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    I can probably get that info this weekend along with some pics of it when in use on the truck.
    m151a2, m1028s, m59 dump truck, LCVP, m416, m104, m101a3
    Stencils for sale!

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  9. #16
    Colonel Neophyte's Avatar
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    Here are the dimensions I need (16 total). Also, does the journals and through holes share the same centerline? Itís a trunion, so might be rhetorical to ask....but better to ask.

    aLLLXvaQSN.jpg

    Ov_2b!om!W.jpg


    n9Q&_v3Hxv.jpg

    V~MRqfsYn0.jpg

    auDxSxcNng.jpg
    Last edited by Neophyte; 01-07-2019 at 21:18.
    1970 M817
    1983 M925
    2 MEP002A
    2 M116A2
    M105A2

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  11. #17
    Colonel Neophyte's Avatar
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    I looked at where this part goes, it’s definitely forged. To get a similar strength, I’ll use a block of 4340, machine it in its annealed state.....then get it heat treated (and tempered/annealed to reduce brittleness). I think this will achieve the same strength....likely better than OEM.

    Heat treating can grow or reduce dimensions....and this part looks like it has some slop in its application (nothings tight within a couple thousandths). If the journals are off post heat treat, does 0.010” off parallel over its length matter? If so, I may need to leave stock and machine in it’s hardened state after.

    Let me know if you guys see anything I’m missing.

    Bob
    1970 M817
    1983 M925
    2 MEP002A
    2 M116A2
    M105A2

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  13. #18
    4 Star General kennys@wi.rr.com's Avatar
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    IMG_0666.jpgI have located one. It is complete with the pulley. My customer is very adamant that it be sold complete with the pulley for $1250 plus shipping. If you are interested please contact me and I will start the process to get it to you.
    Rebuilding an HH

    1971 AMG Deuce Sold

    1985 AMG M923A1

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  15. #19
    General Fredo Corleone's Avatar
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    Wow!
    1970 M756A2 Pipeline Deuce
    1973 LT9000 Ford Ex-Air Force
    1968 Dorsey M128A2C
    2004 M101A3
    1992 M116A2 w/MEP-002A
    1955 M107A2

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  17. #20
    4 Star General kennys@wi.rr.com's Avatar
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    I can only pass along what my customer tells me.
    Rebuilding an HH

    1971 AMG Deuce Sold

    1985 AMG M923A1

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