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  1. #1
    Join Date
    Mar 2006
    Location
    Corunna Ont, Canada
    Posts
    440

    Default Blown caps in XMT350

    Ok so a buddy brings his XMT over and asks me to have a look at it, he says he heard a loud pop and it shut down.

    So open the poor girl up and WOW awesome is it just messed up, never seen a set of caps blow apart like that......

    So far it looks like he will need new caps, new PC2 and new mods(due to mod cap one broke)

    Any idea what would have caused this?

    I did notice that he has the wrong plug wired on it as in dryer plug, so I'm guessing the line 1 was hot, line 2 was neutral, and line 3(red) was the other hot, green ground.

    So if I order these parts is this going to be ok or is something else hiding that is going to take out the new parts?

    Thx Railmen
    2007 Trailblazer 302G
    2004 Invision 354MP
    1999 60 series feeder
    2005 Maxstar 200DX
    2007 CST280
    1999 HF 251-1
    older Hobart hefty wire feeder
    Hyperthrem 600
    Maxstar 150S(such a cute welder)
    had and sold........
    2003 XMT 304CC/CV
    1947 Lincoln SA200G short hood
    1963 Lincoln SA200G
    1975 Lincoln SA200G(best machine ever had )
    1970's Lincoln SAE400G
    2 Maxstar's 200DX's
    1 Maxstar 200SD
    CST 280
    2 CST 250
    MM130


    Railmen

  2. #2
    Join Date
    Dec 2007
    Location
    alabama
    Posts
    743

    Default

    The red is for 3 phase only. White and black is your hot on single phase with green being ground.
    2, XMT's 350 cc/cv
    1, XMT 350 vs
    1, TRAILBLAZER 302
    1, MILLER DVI
    1, PASSPORT PLUS
    1, DYNASTY 200 DX
    1, MAXSTAR 150 STL
    1, HOBART CHAMP
    1, HF-251 BOX
    1, S-74d
    1, S-75DXA
    2, 12-RC SUITCASES
    2, 30 A spoolguns

  3. #3
    Join Date
    Mar 2006
    Location
    Corunna Ont, Canada
    Posts
    440

    Default Pictures

    2007 Trailblazer 302G
    2004 Invision 354MP
    1999 60 series feeder
    2005 Maxstar 200DX
    2007 CST280
    1999 HF 251-1
    older Hobart hefty wire feeder
    Hyperthrem 600
    Maxstar 150S(such a cute welder)
    had and sold........
    2003 XMT 304CC/CV
    1947 Lincoln SA200G short hood
    1963 Lincoln SA200G
    1975 Lincoln SA200G(best machine ever had )
    1970's Lincoln SAE400G
    2 Maxstar's 200DX's
    1 Maxstar 200SD
    CST 280
    2 CST 250
    MM130


    Railmen

  4. #4
    Join Date
    May 2006
    Posts
    180

    Default

    Same thing happened to my XMT 350 CC/CV over a year ago. Do a search of Cruizer's posts on the XMT's. Per cruizer, the cause is the loosening of the cap connections on PC-2 that need to be re-torqued periodically with a torque driver or wrench that measures in/lbs.. When the connections loosen on these high amperage circuits, the result is just what you described. When mine blew, the welder was idle between welds on light gauge material; it was hardly warm.

    I negotiated the price of replacing the caps, PC-2 etc., created a bidding contest between a couple of LWS's and obtained the parts for $1200+ for a DIY repair. You'll need the shop manual. Good luck.
    Last edited by Dmaxer; 08-02-2013 at 01:13 PM. Reason: spelling
    Miller XMT-350 CC/CV
    Miller S-22A wirefeeder
    Bernard 400A "Q" gun
    Miller 30-A Spoolmatic w/WC-24
    CK 210 & WP-18 GTAW torches
    Hypertherm Powermax 30
    O/A Rig, Enco 4x6 bandsaw, etc.

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