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Re: What size are the HPOP fitting internal o-rings on a 7.3 PSD
Posted to HD/Fleet Forum on 4/5/2018

I might catch hell for this suggestion but I wouldn't tell you if I hadn't already proven it works. I had the same engine in a service truck and one of those o-rings blew while on the side of the highway at about 3am. I had a standard air conditioning o-ring k... Login to read more.