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push to connect fitting

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by lwlevens, Nov 20, 2018.

Page 1 of 5
  1. Nov 20, 2018 #1
    lwlevens

    lwlevens Medium Load Member

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    Found a small leak when installing my air dryer IMG_20181120_202722.jpg on this fitting I believe its 1/4" tube x 3/8" threads it was barley leaking so I gave it a fresh straight cut anyway and now it leaks a lot worse should of left it alone. O ring was cracked and dry rotted,so replaced the o ring but theses o rings are a little different then normal o rings reinstalled
    fitting and still leaks.Where can I buy this and other connect fittings? No parts stores around here sells these kind of fittings... Frustrating. Thanks guys.
     
    lwlevens, Nov 20, 2018
    lwlevens, Nov 20, 2018
    #1
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  3. Nov 20, 2018 #2
    SteerTire

    SteerTire Road Train Member

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    Try a welding supply, or plumbing supplier. Not joking, those guys carry the strangest things. Especially when it comes to brass fittings.
     
    SteerTire, Nov 20, 2018
    SteerTire, Nov 20, 2018
    #2
  4. Nov 20, 2018 #3
    lwlevens

    lwlevens Medium Load Member

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    Thanks, was thinking of going to home depot but it needs to work with 120 psi.
     
    lwlevens, Nov 20, 2018
    lwlevens, Nov 20, 2018
    #3
  5. Nov 20, 2018 #4
    Goodysnap

    Goodysnap Road Train Member

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    You must use DOT brass on anything air brake. Every heavy truck parts house and truck dealer across the globe should have these on hand. Try Parker store or hydraulic parts suppliers for stock of proper hose and fittings. I would guess your fitting in question is 1/4 x 1/8"npt. A traditional compression fitting will fit in its place just the same.
     
    Goodysnap, Nov 20, 2018
    Goodysnap, Nov 20, 2018
    #4
    Dino soar, AModelCat, brian991219 and 3 others Thank this.
  7. Nov 20, 2018 #5
    rabbiporkchop

    rabbiporkchop Road Train Member

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    rabbiporkchop, Nov 20, 2018
    rabbiporkchop, Nov 20, 2018
    #5
    brian991219 and Rideandrepair Thank this.
  8. Nov 20, 2018 #6
    lwlevens

    lwlevens Medium Load Member

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    Thanks 3/8 npt goes in the air compressor governor.

     
    lwlevens, Nov 20, 2018
    lwlevens, Nov 20, 2018
    #6
  9. Nov 20, 2018 #7
    stayinback

    stayinback Road Train Member

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    Not true- they have come out with composite fittings that are just as durable as the brass- (Elbows-unions-etc) Actually I was skeptical at first- But now,I replace any airline fitting with the comp ones
     
    stayinback, Nov 20, 2018
    stayinback, Nov 20, 2018
    #7
  10. Nov 20, 2018 #8
    Goodysnap

    Goodysnap Road Train Member

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    Every port on the governor is 1/8" NPT, not 3/8"
     
    Goodysnap, Nov 20, 2018
    Goodysnap, Nov 20, 2018
    #8
    spsauerland Thanks this.
  11. Nov 20, 2018 #9
    lwlevens

    lwlevens Medium Load Member

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    Really I measured the width of the threads with my calipers and it was 10 mm which I believe is 3/8 ?
     
    lwlevens, Nov 20, 2018
    lwlevens, Nov 20, 2018
    #9
  12. Nov 20, 2018 #10
    spsauerland

    spsauerland Road Train Member

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    PTC fittings all seem to leak! Hard to beat compression fittings. One in picture to a compression would a VS269NTA4-2.
     
    spsauerland, Nov 20, 2018
    spsauerland, Nov 20, 2018
    #10
    snowman_w900, Oxbow, SAR and 2 others Thank this.
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