D2 How to bleed the fuel system?

when you say you bled no 1 line was the pony motor runningg and turning the main motor? as you need to open the lines or the bleed screws at the bottom of the injector pump and or the lines from the pump just loosen them a couple turns is enought. Then run the pony motor with the settings levers in the run position until fuel comes thru all the lines then tighten them down one at a time and it should start may take a little loosening then running but sooner that later it will fire off

oldogyou

First you need to bleed the towers that the sock filters are in. Then the individual pumps on top of the injector housing also have a bleed screw. Lastly the injectors themselves.

Removing the fuel tank cap and fitting an old inner tube over the opening (with the fill valve) will help considerably. Cut the inner tube, hose clamp it over the tank opening and apply 5 psi. This will force fuel through the filter housing and into the injector pump.


Matt

SpragueM,

I learned something new today👋

Thanks

CMD

So did I, never after all these 20-30 years of fighting fuel filter replacement and air ,I learned to use something simple like an old inner tube to make the job go so much easier I will remember that trick from now on.
thanks for the tip

I use an extra fuel cap that I threaded in an air valve stem in the vent hole and apply air pressure with a tire gauge.

yes but I can use the innertube idea on any diesel ,as a professional, I am always looking for new ways to do things, and this one seems like its so simple should have thought of it myself.thanks again for the idea......

Geeee Wizzzz. And I thought every old Cat man knew that trick. First time I saw it was on a D7-E about 20 years ago. About 45 years ago my grand dad had a similar valve on a 4 cylinder Wisconsin that was on a New Holland haybaler. Those engines were notorious for vapor locking on a hot day in the hayfield. Dandy Dave!

1 more tidbit, B sure to have the throtle open for fuel (and air) to flow

I 2 learned the inner tube trick on this site

Hey gang,

I have been called to help on a few friend' s Cats, to get them started. They always tell me that it ran out of fuel and then they put a couple of gallons in it. The first thing I do is add at least 10 more. They fired right up, after proper bleeding. Make sure you have a good amount of fuel in it. The compressed air trick is a good one, as long as fuel is in it. Just make sure your not just putting more air in the system. LOL Would the Duct tape work better, or the Bailing Wire here. LOL