j hancock Posted August 13, 2014 Share Posted August 13, 2014 ENDT673C Oil Circulation Diagram ENDT 673C Oil Circulation Diagram Author j hancock Category Antique & Classic Mack Info Submitted 08/13/2014 11:31 AM Updated 04/12/2016 10:24 AM JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/36679-endt673c-oil-circulation-diagram/ Share on other sites More sharing options...
doubleclutchinweasel Posted August 13, 2014 Share Posted August 13, 2014 That's funny! I was just looking at those same pics in my book last night! Was just about to comment on the direction of oil flow.Great minds, huh?I found a note in my manual which indicated that, at one time, the oil flowed through the filter first, then through the cooler. But, as shown in your pictures, the "current production", as they called it, went through the cooler first, and then through the filter. So, the images I posted are correct for my particular model.And, agin, the filter is holding oil today. So, the check valves work...sometimes. You know, I remember my dad pulling the can out of an old R when I was just a young'un, and that can was not full, either. And, I know he had not drained it. I guess check valve issues were common on those cans...even back then. "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/36679-endt673c-oil-circulation-diagram/#findComment-255916 Share on other sites More sharing options...
j hancock Posted August 13, 2014 Author Share Posted August 13, 2014 This was TS 442 with first print date 1967 with a revision date of 1977. JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/36679-endt673c-oil-circulation-diagram/#findComment-255917 Share on other sites More sharing options...
doubleclutchinweasel Posted August 13, 2014 Share Posted August 13, 2014 Mine was a '72 printing... "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/36679-endt673c-oil-circulation-diagram/#findComment-255918 Share on other sites More sharing options...
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