The Fordson Tractor Pages Forum

Any copper washer work? Weeps very slightly when running.

Which screw are you referring to? The pump one's washer needs to be exactly right and you must be very careful not to let dirt in. Try tightening the leaking screw a wee bit more, but don't overdo it.
Sandy

Sandy It's the bleeder screw on the njector on our 55 FMD. I will give it a snug. Need to find replacement at some point as it has been abused.

Is it on the pump or an injector pipe? In either case look for a good second hand one, as you'll be pushed to find replacement pump screws and repro injector pipes are very poor.
Sandy

Hi,

Presuming it’s is the bleeder plug on the gallery on the pump; I would take it out, cover the hole, take washer of, and make it soft again with the torch.

Uncover the hole, bleed it thoroughly to make sure any dirt is out and refit plug and washer.

Most times the torch method helps when no new fitting washer is available

Thanks both. I,ll try torching washer.

https://injectionpumps.co.uk/basket/
Anyone familiar with this company? They have the bleed screw and washer I need.
Lots of Simms parts and many other brands.

I hadn't looked at them, they're pretty good and essential for any work on the injector pump.
Sandy

I've had the new bleed screw and washer for a while and finally had time to replace them. Unfortunately it did not solve the weeping fuel.
I hope it is not a crack as Shepp stated might be a possibility.
With reading glasses on in good light it is clearly leaking at the top of the inspection cover, not at the bleeder.A new gasket is on the way.

This is sounding rather like a crack, see and have a good look when you fit the new gasket to see if you find anything (and pump the lift pump to see if the leak appears when the fuel gallery is pressurized), a pic would allow us to give you an opinion about it too, although you'll have a much better view yourself.
Sandy

Thanks Sandy. I'm assuming fuel should not be leaking from inpection cover, even if gasket is compromised?
I remember running with cover off and no fuel all over.

I would say if there is a crack it will be on the outside. Try cleaning the outside of the pump at the top with some fine sandpaper and see if you can see any signs of a crack

You may also want to anneal your new copper washer, again you want to test for leaks by pumping the lift pump to pressurize the fuel gallery. The new bleed screw looks good.
Sandy

Good thinking Sandy, it will certainly seal better if it's softened. If you can find a crack i have some old pump bodies here, i can cut one through at the point of the crack and see how thick the metal is there and whether it can be TIG welded

John b wrote: ↑

Mon Mar 21, 2022 8:17 pm

If you can find a crack i have some old pump bodies here, i can cut one through at the point of the crack and see how thick the metal is there and whether it can be TIG welded

That sounds like quite a difficult job, let's hope there's no crack there.
Sandy

While it may appear to be a crack in the picture, I am confident it is a scratch after using magnifying glass.
Also any fuel you see near bleeder screw is coming from seal between inspection cover and pump body. It is also leaking from the cover side, if that makes sense. If you can see the two small scratches below and to the left of bleeder, that is where the fuel weeps out. Until I try a new gasket are there any more ideas? While I could not find fine sand paper I did like lightl buff it with steel wool.

Thanks!

Contact injectionpumps.co.uk for the cover gasket. There should be no fuel leaking from the joint at this point, the fluid level in the pump cambox is much MUCH lower. This is fuel from another source, unfortunately I would say that there IS a crack in the pump charge chamber at some point and fuel is finding its way through to appear at this location. The picture showing the delivery valve holders does not appear to show any fuel leakage from them, so that leaves a crack as the only plausible explanation.

Thanks Shepp. I have ordered the cover gasket from injection pumps.co.
I'm not liking the sounds of this.
Wishful thinking that the pigtail could be clogged up?

If you haven't annealed the washer yet it's the most likely cause, other than that as Shepp says it probably is a crack, although I would wait until you have the new gasket on to be sure.
Sandy

Just undo the banjo bolt that attaches the pigtail pipe and see if there is a rush of fluid spurting out, but I doubt it! A crack allowing fluid to seep out and run around the edge of the cover plate is the most likely explanation.

Billy26F5 wrote: ↑

Tue Mar 22, 2022 8:09 pm

If you haven't annealed the washer yet it's the most likely cause, other than that as Shepp says it probably is a crack, although I would wait until you have the new gasket on to be sure.
Sandy

I'm certain that the washer is okay and that the original was fine as well. If you could see it you'd agree. If I had looked closer to begin with I'd have notic d the leak was from the spot I've mentioned. I may try to film it if anyone is interested.
As you mentioned I'll try the new gasket, but as Shepp said, fuel should not be that high.

A good way of pinpointing a leak is to clean the area thoroughly and watch to see where the leak is. I've found many leaks on our vehicles with this trick.
Sandy

Sandy I apologize for not taking your advice on taking off inspection cover earlier. I was so convinced it was the bleeder screw washer and then the cover gasket!
But moving on: I took the cover off and found the fuel is coming from #4 and #1 "barrel locating screws" if I've got firing order correct.
I hope you all can see it in the picture. Parts show a washer behind this screw, but I know this screw should not be adjusted-and I won't without everyone's advice.
Interestingly there was no cover gasket and no lock washers for cover.
I did not start Hyacinth, only used the hand pump.

looking inside I can see no cracks, but understand they may not be visible.

The barrel locating screws should have fibre washers to seal the barrels. There is no adjustment in them, but you will need to release the tension in the spring on that cylinder (turn the engine slowly until that plunger has moved down, then see what the tension is) before removing them to fit new washers. Those are cylinders 1 and 3 (firing order 1,2,4,3). I recommend you try tightening the screws and pumping again to see if the leak stops, if it doesn't you'll need new washers.
The lack of gasket is not good, as it allows dirt in; there are no lock washers on the cover. Remember to be absolutely clean when doing all these things.
Sandy