AFC shaft o-rings - Dodge Cummins Diesel Forum
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post #1 of 6 (permalink) Old 06-07-2019, 12:41 PM Thread Starter
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AFC shaft o-rings

A few weeks ago I pulled my AFC off to install a lighter spring and do the flat washer/ foot grind mod. The O-ring on the shaft looked pretty bad (over 20 years old, flat and hard) so I pulled it off and it broke in the process. I have several O-ring kits in metric & sae but none of them had a good replacement. I ended up putting two o-rings in the groove that had the correct ID & OD but a way smaller cross section (hence two of them actually fit in the groove.
Long post to say, does anyone know where I can get replacement O-rings for the AFC shaft? I tried the regular websites (Geno's, PDP), searching google and this forum, still could find them.


97 Extended cab 4x4, NV4500, valair single disc clutch, 4k gov springs, +60 lb valve springs, homemade #10 plate, medium tension AFC spring, flat washers AFC diaphragm, stock turbo and injectors, lifted on 37" tires with re-stacked limited slip friction plates, and factory 4:10 gears.

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Last edited by Antonm; 06-07-2019 at 02:28 PM.
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post #2 of 6 (permalink) Old 06-07-2019, 12:53 PM
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Do you have a picture of where they go?


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post #3 of 6 (permalink) Old 06-07-2019, 02:15 PM Thread Starter
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Not my picture (got it off google image search) , but this is the O-ring I need.


97 Extended cab 4x4, NV4500, valair single disc clutch, 4k gov springs, +60 lb valve springs, homemade #10 plate, medium tension AFC spring, flat washers AFC diaphragm, stock turbo and injectors, lifted on 37" tires with re-stacked limited slip friction plates, and factory 4:10 gears.

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Last edited by Antonm; 06-07-2019 at 02:19 PM.
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post #4 of 6 (permalink) Old 06-07-2019, 02:31 PM
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I canít find a part list the goes with this but o bet a local Bosch shop can get you the part with the picture




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post #5 of 6 (permalink) Old 06-07-2019, 02:46 PM Thread Starter
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Looks like I need piece 24 from the explode view. This shouldn't be complicated , its an O-ring that sees maybe 40psi and not that much heat. Any regular rubber O-ring the right size should work (although I would prefer a viton) . Beside the fact there isn't a local Bosch shop anywhere close to me, I'd imagine that Bosch would charge something like $30 for one O-ring. There has the be a source online, hell, you can order brides from Russia online, surely an O-ring can be found.

97 Extended cab 4x4, NV4500, valair single disc clutch, 4k gov springs, +60 lb valve springs, homemade #10 plate, medium tension AFC spring, flat washers AFC diaphragm, stock turbo and injectors, lifted on 37" tires with re-stacked limited slip friction plates, and factory 4:10 gears.

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post #6 of 6 (permalink) Old 06-07-2019, 09:39 PM
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Quote:
Originally Posted by Antonm View Post
its an O-ring that sees maybe 40psi and not that much heat.
There shouldn't be any real pressure there at all. The pressure is on the other side of the diaphragm. If your dual o-ring fix isn't leaking any oil then I think you're good.

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