Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

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Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Rox Crusher » Sun Aug 30, 2020 7:36 am

Does anybody happen to have the replacement oring set for an ARB RD119 locker ?

Instruction Manual says they are part number 160235SP.

I can get the off ebay but not soon enough.
1977 Sport, 351w OBDII EFI motor, 4R70W auto, 4:88 gears, ARB lockers, 3.5" suspension, 33" tires.
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby horseplay » Sun Aug 30, 2020 11:35 am

High country 4x4 should have them. I wish I was closer I keep them in stock as well. I bet 4wheel parts has them as well.
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby B.O.B. » Sun Aug 30, 2020 1:19 pm

I can check tomorrow when I get to work how fast I can grab one
71' bronco, np435 w/trailbanger, 302 efi, 35" KM3 on 17x9 Fuel Anza, warn xd9000i, cage arms, 5" lift
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Eck » Sun Aug 30, 2020 2:34 pm

https://www.northridge4x4.com/part/lock ... NEQAvD_BwE

Another option local.


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69 Wagon, 351W, Explorer EFI & Serpentine, ZF5, 35" tires, 3.5 SL, 2 BL, WARN 8274
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Rox Crusher » Sun Aug 30, 2020 2:45 pm

B.O.B. wrote:I can check tomorrow when I get to work how fast I can grab one


Thank you Bob that would be great
1977 Sport, 351w OBDII EFI motor, 4R70W auto, 4:88 gears, ARB lockers, 3.5" suspension, 33" tires.
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Digger » Mon Aug 31, 2020 7:25 pm

I have 8 of those o-rings, you are welcome to have a few.

For reference, those o-rings are -133 size Viton. I bought McMaster P/N 120T792 to use as replacements. I think you can also use McMaster 6540K236, which is the X-profile, providing a better seal, but I have been running 100,000+ trouble free miles on convention round profile o-rings.
Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread: http://www.coloradoclassicbroncos.com/viewtopic.php?f=3&t=5420

Average 23.5 mpg, Best tank: 25.1 mpg
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Kinder » Wed Sep 02, 2020 7:20 am

If you are handing out spares I’d like to grab one for TFB, I think his is failing.
Best to Date MPG: 26.6
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Digger » Wed Sep 02, 2020 8:42 pm

sure, no problem
Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread: http://www.coloradoclassicbroncos.com/viewtopic.php?f=3&t=5420

Average 23.5 mpg, Best tank: 25.1 mpg
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Re: Oring Seal Kit for ARB RD119 locker - Ford 9" 31 spline

Postby Eck » Mon Sep 14, 2020 6:42 pm

Digger wrote:I have 8 of those o-rings, you are welcome to have a few.

For reference, those o-rings are -133 size Viton. I bought McMaster P/N 120T792 to use as replacements. I think you can also use McMaster 6540K236, which is the X-profile, providing a better seal, but I have been running 100,000+ trouble free miles on convention round profile o-rings.
Just ordered the X-profile rings you suggested. Ended up having a leak up in Buena Vista so need to open it up and figure it out. Any further recommendations on how to install this thing to best avoid the dreaded air leak and locker failure?


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69 Wagon, 351W, Explorer EFI & Serpentine, ZF5, 35" tires, 3.5 SL, 2 BL, WARN 8274
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