Bleeding a 730 Diesel

Any help would be greatly appreciated.
Chris

Thanks

Farmerherron:

No, you don't have to remove the cylinder cover. The bleed screw is located in the center of the odd looking "double-nut" pipe that exits the left side of the engine block near the governor control linkage. You just remove it, and allow fuel to flow bubble free.

Frank-in-Tallahassee
70D // 855

Can't seem to find this "double-nut" pipe. Took off govenor linkage housing to reveal nothing but the side of the engine block and a push rod for govenor control. Can you explain more of where this "double-nut" pipe is?

Thanks

FH:

Ok, here it is, fresh from the camera.

If you had the governor link housing off, you removed the fuel rail pipe that contains the bleed screw in it's end.

Hope the picture helps.

F-I-T

Thanks for the help but my 730 does not have a bleed valve there. I took the cylinder cover off and still couldn't find a bleed valve. Maybe the later production models were changed? Maybe they went to an auto bleed system? Looks like you have a pretty nice 730.

Tbanks again for the help.

Ok, here's what I can surmise. There appears to be a piston/relief valve arrangement between the fuel rail/pump mounting bracket and the pumps. Not sure if it's on the left or right side. This appears to be an auto bleed on late 730's.

So, to get you going, you crack an injector nut just enough to allow fuel to leak/spray out while cranking, and that should void the air if indeed the auto bleed is not working. If you crack them both it will guarantee that they will be free fron air. Best if you tighten them while it is craning, though.

Sorry for the confusion. I didn't notice the extra paraphernalia in the drawing the first time. I pretty much have my old 70D committed to memory.

Learn something new every day !

Frank

Cracked the injector nut and cranked the engine until fuel spit out. Did both sides and reassembled. Started right up. I'll never make that mistake again. Thanks alot for the help. I learn something new every time I work on these things.

Chris

Good Deal !

Sorry I led you astray on the bleed screw. I'm not so sure they made an improvement with the auto-bleed. It's a piece of cake on the 70D since you already have the wrench in your hand for the filters. You just loosen the two at the filter and the one on the side, then tighten them up 1-2-3 as the fuel spills.

Happy Poppin !

Frank-in-Tallahassee
70D // 855

Looks like there was a design change with the late 720, or 730 models.

I don't have an operator's manual, so I just can't say for certain.

Frank