Series 60 priming pump. Need advice

After the filter is how baby cummins isl lsc and isx IS mounted behind ecm mounting plate sounds like maybe have a bad pump of maybe bad fuel line sucking air should have picked up fuel by now

 

I really don't think it matters, unless the primer pump itself needs filtered fuel to protect the pump gears. I would install one somewhere it is easy to get too, thats all.

 

If you have one filter it is a Davco and it has a check valve. That could have failed but the bowel would be empty, the cylinder head could drain even with a the check valve if there is air sucking into the system after the pump. I have an adapter that I put on the fuel pump outlet, it has a male female fitting with an adapter for an air connector. I have a wet tank air tank with two female couplings in it I fill it with fuel, and pressurise it to shop air pressure I have a hose with a ball valve I plug into the bottom of the tank, I connect the other end to the fitting I installed at the fuel pump. I worked on a lot of freightliners so I would get someone to look into the tank and watch till the air stopped coming from the return line. Get some to start it if it starts bogging down I added more fuel, holding it I knew when it was getting low, so I did not fill the system with air. I used that tank to get the early "E" Cats to start, Cummins Mercedes, just plug into the compucheck fitting and flush away.

 

pressurize the delivery fuel tank with compressed air. get a plastic funnel that will cover the tank opening, insert the air hose , apply air , and have someone crank the truck, mashing the fuel to the floor. this will start your truck. johnny