leversole Posted October 24, 2015 Share Posted October 24, 2015 My B has a transplanted motor from a later truck and the primary and secondary fuel filters are both on the drivers side,. Is this correct? I ask because the line comes from the tank, thru the primary filter, across the top of the motor to the pump on the injector, then back across the top of the engine to the secondary, then back across the top into the fuel injector...looks like a lot of wasted line and potential blockage area (from the old hose). Just wondering where the stock filters would be.I will be changing the filters because of a loss of power/max rpm problem I have occasionally...dont think it is the filter because though they have been in there 3 or 4 years, they dont have that much fuel thru them.Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/42334-fuel-filter-location/ Share on other sites More sharing options...
thomastractorsvc Posted October 24, 2015 Share Posted October 24, 2015 On the original motor i would think it would be on the passenger-side front same as the pump. On my B and the later Mack engines that I have seen they were also on the right. The Cummins in my Super-liner is on the left but so is the pump. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/42334-fuel-filter-location/#findComment-308627 Share on other sites More sharing options...
farmer52 Posted October 24, 2015 Share Posted October 24, 2015 Leslie,Can't help with the filter location but it sounds like you might be able to simplify your hose routing. Perhaps you are "sucking air" at one of the many connections. Some fuel systems have the primary filter between the tank and transfer pump and the final (secondary) filter between the transfer and injection pumps. It is easier to "pull" the fuel through a "course" filter and "push" the fuel through a "fine" filter. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/42334-fuel-filter-location/#findComment-308628 Share on other sites More sharing options...
terry Posted October 24, 2015 Share Posted October 24, 2015 The original B models had a filter on the left side that was a filter that the top turned and scraped the filter clean, then went to the right side with a filter like the bottom photo of above post. terry Quote Link to comment https://www.bigmacktrucks.com/topic/42334-fuel-filter-location/#findComment-308634 Share on other sites More sharing options...
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