CowRazy

On the injection pump, to the right of the diaphram, is a banjo bolt with a u-shaped line that attached to a 90* elbow attached to the intake manifold, (I think it's the intake manifold).

I noticed the line is broken where it attaches to the banjo bolt. I had noticed a fuel smell for about a week prior, but the Cummins seemed to start and run normally. There wasn't a noticable leak either.

How can this be fixed? Can I go to Cummins and get a new part?

Thanks All,
Harley

John Faughn

Cummins should have the part , fixing is a have to see it , silver solder , some times ,

wannadiesel

That's the boost line to the AFC, that's why you can't see a leak. Nothing but air in there. Like John said, you might be able to solder it, but you can get a new one from Cummins. You will be pleasantly surprised with the increase in power when you finish your repair.

NYCEGUY01

PM Me your address and Ill drop one in the mail. Ive got 2 or 3 that I replaced with different hose etc... when I installed a valet switch

CowRazy

Thank you!, you truly are a nice guy! As are all of you who've helped me this this and other issues.
Harley

Caver Dave

Mine isn't broken that I know of, BUT it does spin in the fitting at the intake. Any chance it shouldn't do this, is causing a vacuum leak, and possibly the cause of low performance on my rig?

wannadiesel

If tightening that fitting does not lock it down, then replace the gasket in the fitting.

Caver Dave

What I meant is where the tube goes vertically into the fitting on the intake is loose. When I removed the banjo to access the AFC & pump cover, the tube simply pivoted out of the way... the fitting in the intake & banjo are both tight.

If that's what you read too, tell me about the gasket! Is it like an o-ring in the fitting that accepts the tube? Or something else?

John Faughn

I think I need a picture .

Caver Dave

Where the tube meets the intake 90* fitting... the tube spins inside this fitting and *easily* spins rearward to clear AFC housing once the banjo bolt is removed. IOW, the banjo fitting will swing almost rearward/back against the intake.

Should it? (figure there *may* be some movement allowed so it doesn't break)
Or shouldn't it? (and subsequently leaking?)

wannadiesel

You ought to be able to lock it down pretty tight by tightening the nut. They will swivel, but it ought to take some effort to move.

CowRazy

I got the replacement fitting installed today. (Thanks, NYCEGY01!)

In checking the broken end, the break was all tarnished, so it had been that way for some time. I only saw it because I was fiddling with my wiring. A good thing to check because you really wouldn't notice it if it just cracked.

The tube can swivel when the intake fitting is loose.

Thanks,
Harley

Caver Dave

So if it's moving with ease, the fitting needs tightening, and there's a fair assumption it could be leaking?

bgilbert

Yep, it's a leaking. 13mm wrench at the cylinder head, 12mm on the banjo bolt. Do not overtighten!!

I've heard one can tap the afc cover for 1/8npt then eliminate the hard metal afc line with 1/8npt tubing and fittings on each end.

Caver Dave, you got some cap screws missing on that afc cover .

Caver Dave

Thanks BG... I thought there might be "something" not quite right with the ol' gal. "Luckily" I got a set of metricated gear wrenches for fathers day...

Greg (BigWaylon) says the 8mm banjo is PFC to 1/16" NPT... I'd already though about swapping out the hardline for something a bit newer

Uh, that pic is from the 3200 spring install sticky! (was at work and remembered seeing the tube in question)