I was told by a tech at Newell just 2 weeks ago that on the Davco 382 you only need to open the canister to bleed the water out when the dash light comes on first or noticable driving differences. Changing the filter whenever you do drain it and the process includes refilling with fuel half way up the sight glass (plastic housing) through the top spring clip. The procedures for doing all this are printed on the canister side under the Detroit Deisel logo. Mine is 3/4 and that's why I asked when at Newell if it needed to be drained and the filter changed and was told no until the dash light comes on or I feel a difference in performance and the sight glass is full. I can see my filter is pretty clean through all the holes in it.
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Larry & Hedy Brachfeld
2003 Double Slide, Detroit 60
Coach # 646
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