the one job it is done for is to spill time the pump. spill timing is when the engine is bared over and you are watching no1 pump port for it to spill fuel and verify it against the timing marks. this method can also be used to find timing marks by watching the valves. only works with mechanical injection though.

some engines its a bad idea to disturb the fittings. Mercedes- Benz is one as they haves special sealing washers on the fittings and must be tightened in proper sequence and increments to bed the seals.

I have 5J3691 and have had to bleed it out a few times, like whenever the filters needed a change. There have been times I have had to loosen a tube fitting at the injector. I don't know why, but I suspect air trapped somewhere. I prefer to not loosen any tube nut if I can get by without. If you can get it going on a couple or three cylinders, the bleeder screws on the dry holes will generally work and it won't cover you with oil, or worse.

For sure, it will not bleed clean like my 5U engine will!

UPDATE:
Thank you everyone for the info. The topic seems to have grown significantly from fuel pump to fuel system. After the last comments, i re-bled everything from top to bottom to top again, this time waiting at least 30 seconds before closing bleeders even if no air appeared. 15th time around, snapped the throttle open and she lit off! First time she's ran in at least 10 years, probably more like 15 or 20.

It is issuing a lot of black smoke like it's over fueling. Also 'popping' a bit out of exhaust stack. Granted, it's been quite a while since the ol' girl has ran, but the over fueling and popping concerns me. Along those lines, the previous owner mentioned that they had timed the injection. Considering the source, i'm not sure they were capable of doing this, but the comment certainly has me wondering if perhaps the injection timing has been mis-adjusted. My question is, which manual do i look in for the timing procedure? This is something i'm going to want to check right away.

Also, diesel in the oil, and not a little bit. I did dump all the fluids and refilled before spinning the main, however my first project now that i know it runs is to replace FI pump o-rings, seals, and gaskets before running again.

The rebuilt starter pinion seems to be pretty close in adjustment, might need to tighten it up 1/2 screw on the latches, but frankly it's pretty darn close. The video instructions that Squatch provided was invaluable!

I have an oil filter question, but i'll start a new topic for that.

cheers!
-TS

any reputable injection should be able to rebuild the injectors. these are old enough they would have done them on a injector lathe and then lap them in with chromium oxide.

toddsmith23 wrote:

It is issuing a lot of black smoke like it's over fueling. Also 'popping' a bit out of exhaust stack.
 

Have you checked the air cleaner? A blocked air cleaner will cause black smoke like you describe. Popping may clear up once you start working the machine.

yes as phil suggests check the simple things their much cheaper to fix. to clean the air filter soak it in a bucket of kerosene it may take a couple of goes to get all the dirt out.
i read somewhere about using a coil of copper tube with little holes drilled in it to make a air bubbler to agitate the kero from the bottom and speed up the cleaning.

Update: Slowly working out the issues. I have an urgent need for either a working or parts fuel injector. Anyone know of a parts source where i can get an injector or two fairly quickly? Thank you!!

That popping is more than likely an occasional sticking valve.

Yes, and i have a broken orifice in one of the injectors, hence the need for a replacement working injector or parts injector....