Ford 3000 leaking injector line

BobReeves

Member
Almost ready to give up and make new injector lines using copper/nickle brake line. The line coming out the bottom of the CAV pump started leaking last year at the pump fitting. Bought a couple used adapters off eBay and a new set of injector lines from this site. Replaced all 3 lines which was a project in itself and made sure the adapters didn't have any cracks and looked OK, installed the best 3 I had. Seemed to be OK till yesterday and now the same line is leaking again.

Those fittings at the pump are a bear to get a wrench on and I have tightened it as much as I dare. Is this a common problem and anything other than the fitting/line and adapter be causing this? Wondering if the injector may be requiring too much pressure although I had all 3 rebuilt a couple years ago.

Any other ideas other than making new lines out of something easier to work with.
 
The lines going from the pump to the injectors? Shouldn't need any adapters there. And I doubt any brake line will be adequate for
that purpose.
Have you had the injectors cleaned or rebuilt? I've heard that worn or dirty injectors can cause excessive pressure, leading to
leaks at the fittings.
 

Do you have the clamp with the rubber insulator holding the lines together near the manifold, without it vibration will kill the injector lines.
I've never had replace any of the inj lines on my tractors, guess I've been lucky.
Did you install the sealing washers on the banjo connectors (what your calling adapters) when you replaced them.
 
Use a bright light and check each banjo bolt connection, common to have a high pressure spray at one or both sides of the fitting. Could also be the hydraulic head to housing O ring leaking too, been seeing more of those lately.
 
I dont know what you got but I have found those newer style washers are too hard and dont compress like the copper ones. As for the line on the pump there a guy selling copper flare fitting washers for lines that just dont want to seal. They are made for a/c line fittings but you can use them anywhere.
 
Yes it is the banjo fittings I was calling adapters, couldn't think of the name. I wasn't able to reinstall the rubber clamp, was lucky to get the lines hooked up, the aftermarket lines didn't come close to fitting properly.

Copper washers/seals sound like something I would like to look into. Maybe eBay?
 
The line is SIZED by the pump or engine manuf.. a "brake line" wont work.
Its VERY possible that the leak is coming from somewhere else & dripping at the lowest point.
The "adaptors" are supposed to be TORQUED to 25-30 ftlbs to the pump inorder to get the PROPER crush seal.
IF its leaking where the line screws up to the "adaptor".. there may be some rust at the end of the line OR
IF your using USED "adaptors", they may be distorted from over tightening..{seen that a lot}..
 

The CAV pumps on 2 of my 4000's have started leaking, fuel drips off the lower inj line but it's actually coming from the timing advance.
I'm guessing there's a gasket or seal that needs replacing.

As has been said clean everything good and make sure exactly where the leak is coming from.
 

I haven't had any luck with the steel washers. I went back with copper and stopped the leak. Brake line has waaaaay thinner wall than fuel injection line.
 
Haven't got back to it yet, other pressing matters. I will check to make sure where the leak is, last time it was the fitting on the line and a quick look seemed to be coming from the same fitting. It's a pretty good leak, several drips a second.
 
Weird... Pulled the tractor back to the shop this morning to get a better look at where it is leaking from. I know these things do not fix themselves but this morning it wasn't leaking. The other day when I had it out it was a constant drip.

I was able to tell it was either the banjo to pump or banjo to line and not dripping down from the top of the pump. Hard to tell exactly as all 3 lines were wet. I wiped everything down and will keep an eye on it. No idea why it stopped leaking.
 

Well I was wrong!
That minor fuel drip turned into a gusher today, I lost over 5 gallons of fuel mowing a little 2 acre field of hay.

You can see fuel pouring off the bottom of the timing advance

19203.jpg



Turns out the top cover gasket had pushed out

19204.jpg
 
Wished mine was that simple, I did the top end of the pump on my 3600, not difficult at all, sure easier than trying to get a wrench on those fuel lines.
 

Didn't have a gasket and was trying to mow hay so I took the new pump off of my 4500 and bolted it on to the 4000.

19218.jpg



Got it going and mowed till dark, another 4-5 hours tomorrow and all of the 1st cutting will be mowed
 

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