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Old 05-05-2015, 01:52 PM   #17
01RAMer
Montana Fan
 
Join Date: Jun 2007
Location: Gardners
Posts: 183
M.O.C. #7316
[/quote]
Reservoir P/N 2280450; Cap P/N 2500006; o-ring is a standard 348 o-ring. [/quote]

A 348 O-ring is too big, its 4-3/8" and almost 1/4" cross section.
What you need is a 153 Buna-N, probably a 70 Durometer, which is around 3-1/2" and around 3/32" Cross Section. A 90 Durometer might be too hard. I used a 70 and it worked great. I got mine at "The O-Ring Store" for about 50 cents not including Shipping. Just in case anyone is interested.
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