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  1. #1
    Join Date
    Oct 2006
    Location
    Central Texas
    Posts
    668
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    RTHC Cold filter line fitting

    Got one for you guys who have replaced the 5/8 steel line to copper. From the cold filter line to compressor housing, there is a fitting looks to be compression style or roto-lock? Parts breakdown not real clear, priced new nut, adapter, & sleeve. Inspected job for bid, machine still under pressure, a little unclear on how this makes up. Thanks.
    Sic Semper Tyrannis.

  2. #2
    Join Date
    Apr 2004
    Location
    Winnipeg,MB,Canada
    Posts
    95
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    ORB

    The fitting you mention is called "o-ring boss" or ORB. It allows you to thread the fitting in to the position you want, then you tighten the nut down, squeezing an o-ring into a bevelled seat. I like to use a little Nylog on the o-ring, keeps it from pinching or rolling.

  3. #3
    Join Date
    Nov 2007
    Location
    I am unsure myself
    Posts
    1,116
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    There are two parts to that fitting one needs to be silvered onto the end of the copper and the nut is a separate part no. I just replaced a couple during a overhaul and I know the end piece is a adp?????. Pretty simple repair fyi

  4. #4
    Join Date
    Oct 2006
    Location
    Central Texas
    Posts
    668
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    Thanks for the responses, like I said the parts break down don't even show the part... it just lists a nut, adapter, & sleeve. I figured it probably soldered on... nothing a little silver can't fix, thanks again.
    Sic Semper Tyrannis.

  5. #5
    Join Date
    Jan 2015
    Location
    service truck or dark mechanical room
    Posts
    19
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    I have replaced those lines and all others that were steal down to gas pump. Seems that I remembered parts difficult to find, believe they were with rnewl parts.

  6. #6
    Join Date
    Jan 2011
    Posts
    1,374
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    NICE! Dragging up a six year old thread. I wonder if that's a record.

  7. Likes jayguy liked this post.

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