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Thread: Air line for locker

  1. #1
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    Air line for locker

    Hello,

    I need to replace my copper air line for my ARB locker, I'm having a hell of a time finding the proper sized copper tubing.

    I believe that the existing copper line is 6mm, most of the stores here in town carry 1/8"

    The 1/8" outside diameter is real close but the inside diameter is smaller.

    has anybody used the 1/8" line? any problems? I would like to use compression fittings for easier future repairs as well.

  2. #2
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    I think it's 3.5mm or 3/16", I know ARB made a switch from metric to standard at some point as well so it will depend on the year. There are a few good threads on it over a Pirate. But generally speaking, ARBs don't use a lot of air, so the ID or flow won't matter all that much. It may just take a split second longer for it to engage.

  3. #3
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    I'm using 1/8" microline (plastic) for my ARBs....matter of fact both my front and rear lockers are pressurized by a small CO2 tank through these lines...lasts well over a year.
    Wa Pa Pow!

    76 CJ =8"+ lift ... 38.5 Boggers/Atlas/14 bolt+D44 Locked w/ARBs , 8000lb winch
    95 ZJ = 5"+ short arm lift... 33" Duratracs/ D44+D30 Locked, 12000lb winch
    2012 Kenetrek - Mountain Hunting Boots, size 13,(Back Up) Low Miles, lol


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    https://www.polyperformance.com/arb-...-5mm-to-3-5mm/


    Sent from my iPhone using Tapatalk

  5. The Following User Likes turbobrick's Post:

    Dirty Harry (February 19th, 2017)

  6. #5
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    Plus one on the poly(plastic) microline. ARB sells there own which is blue. They make quick connect and disconnect compression fittings for it, and also make inline compression fittings just in case a line brakes so you can splice it back together.

  7. The Following 2 Users Like Toymerica's Post:

    CashMoney (February 20th, 2017), Dirty Harry (February 19th, 2017)

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    Thank you for help in this issue.

    Is the plastic riggid? Can you form it up and over a ring gear?

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    I've done some bends in it with the careful use of a heat gun and when hot, immediately chill it with dust off (upside down).
    Wa Pa Pow!

    76 CJ =8"+ lift ... 38.5 Boggers/Atlas/14 bolt+D44 Locked w/ARBs , 8000lb winch
    95 ZJ = 5"+ short arm lift... 33" Duratracs/ D44+D30 Locked, 12000lb winch
    2012 Kenetrek - Mountain Hunting Boots, size 13,(Back Up) Low Miles, lol


    KF7VCG


    heh,heh,heh,heh.............

  10. #8
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    I have some spare blue plastic line if you would like to try. To be honest, I wouldn't run the blue plastic line in the diff, too much change in temp for me to be comfortable.

    You may want to speak with Uncle Gerry on here. He did my ARB install in the Dana 30 high pinion. He didn't run the copper line over the ring gear and instead drilled and tapped the thick portion of the housing. He would know the best way to fix your ARB


    Sent from my iPhone using Tapatalk

  11. #9
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    I spoke with the ARB rep yesterday at the local 4x4 store grand reopening. He said he will send me an ARB repair kit free of charge.

    Thank you all for the help with this.

  12. The Following 3 Users Like Bubbadubrub's Post:

    CashMoney (February 20th, 2017), Dirty Harry (February 19th, 2017), Reno4x4Garage (February 19th, 2017)

  13. #10
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    So the copper line is braised onto the arb seal housing. You run that in your diff around your ring gear, and then drill and tap the top of the diff casting where you run a compression fitting that you can then run the poly line to the lockout solenoid.

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