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Click on image for the lowdown. 
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| | | Forums66 Topics128,089 Posts1,055,988 Members48,430 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | In my 38 manual, it describes a V shaped ring that is between the holes on the end of the plunger and the rubber on the primary cup. This prevents the rubber on the primary cup from imbedding in the holes. This is on trucks 3/4 ton and up. Brake MC Details
Last edited by truckernix; 12/10/2011 3:53 AM.
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