Meet And Greet

[NateSurvey]

Hi! My name is Nathan Dearyan. I live in SW Arkansas. I am a land surveyor. We home school, and love living on God's green earth! We just bought an old Fordson Tractor. The guy I got it from said it was a 1963 with Dexta engine. It is 3 cylinder, diesel. It does not run at this time. He told me it ran 2 yrs ago, and they put it in the garage, for the winter, and it would not start next spring. I have been reading here. It has the SIMS injector pump. It has an air control, as in the throttle is hooked to the intake manifold. It has injector return lines. I have never seen anything like it. I wonder how it adjusts how much diesel to send to the injectors??? Anyway, I have pics to post later. I hope to get it running, and use it. I don't fish often enough.
Thank you for letting me join your forum.
I like sawmills, and anything mechanical.

Nate

[Bensdexta]

Hi! My name is Nathan Dearyan. I live in SW Arkansas. I am a land surveyor. We home school, and love living on God's green earth! We just bought an old Fordson Tractor. The guy I got it from said it was a 1963 with Dexta engine. It is 3 cylinder, diesel. It does not run at this time. He told me it ran 2 yrs ago, and they put it in the garage, for the winter, and it would not start next spring. I have been reading here. It has the SIMS injector pump. It has an air control, as in the throttle is hooked to the intake manifold. It has injector return lines. I have never seen anything like it. I wonder how it adjusts how much diesel to send to the injectors??? Anyway, I have pics to post later. I hope to get it running, and use it. I don't fish often enough.
Thank you for letting me join your forum.
I like sawmills, and anything mechanical.Nate

Welcome aboard!
The injector pump does all the metering based upon the suction in the inlet manifold, which depends upon the throttle butterfly opening, hence the pipe from inlet to pump. There's a diaphram in the injector pump which senses how much suction and controls the metering. Simple system, works well, provided your diaphram is good.
Good luck!

[Jerry Coles]

Hi Nathan and welcome to the board.
You'll find a wealth of information and advice from a large number of experts/users/hobbyists/dexta lovers.
Many of these are located "over the pond" in the US so help isn't far away.
All the printed materiel is available here from user handbook, parts list and workshop manual.
As regards spares/replacement parts several UK companies specialise in Fordson tractors.
Don't be afraid to ask as many questions as you like - we're here to help each other.

Regards
Jerry

[NateSurvey]

Thanks guys. I saw that tube and thought it was to prime the engine in the manifold. Now, my tractor has been messed with Non stock filter in the fuel filter, and parts are missing. Now I have to figure out how to prime the manifold, because that is a vacuum tube. Does it also double as a primer to the intake?

Thanks!

Nate

[Bensdexta]

Thanks guys. I saw that tube and thought it was to prime the engine in the manifold. Now, my tractor has been messed with Non stock filter in the fuel filter, and parts are missing. Now I have to figure out how to prime the manifold, because that is a vacuum tube. Does it also double as a primer to the intake?

No there is a separate pipe from fuel tap under the fuel tank to the inlet manifold for squirting in a few ml when starting up.

Have a look at the parts list here

http://partstore.agriculture.newholland ... 97ar466180

[NateSurvey]

OK, wow. I find also a PLUG in the right side of the intake manifold.... probably the blocked off remains of the primer assembly. The whole assembly is GONE from this one. The fuel petcock is also non original.
I plan to hook up a bottle to the Fuel inlet to the fuel injection pump, and elevate the bottle 3feet or so, to apply positive pressure to the fuel injector fuel inlet. And, try to get her running. If I fail, then I plan to disassemble some of the plates on the side of the injection pump, to get rid of any bad or sour diesel, and try again. Back to the plug in the right side of the manifold, I think I can remove the plug, squirt a bit of diesel in there, and add 12 volts to the manifold heater, and give it a try. I suspect I can get her to run on a little silicone spray up the intake, just enough to see that it all works. This may get enough fuel through the injector to make her run normally, off that bottle 3' up. IF I get it to run off that, then I will be finding all the plumbing from the tank to the fuel pump, and adding an extra fuel filter inline trap, and replacing that line to the right side of the intake manifold.

I am sorta thinking out loud here. Am I on the right track? I am a little cautious with Ether. Just a bit hot.

Thanks for your link. That really answered alot of questions for me. Is there some sort of nozzle at the point of the primer line, entering the intake manifold, or is it just a fitting to dribble a primer load of diesel into it? I have not yet figured out how to navigate to the pic of the intake manifold.

The fuel lines have "blobs" on the ends, where they attach, that are like none I have ever seen. What are they called, and can I buy them as just the end assembly, to put on a fuel line? If worse comes to worse, I think I could make them out of copper tubing and high strength solder!

thanks so much!

Nate

[Bensdexta]

Depending on where you are and the outside temp, you may not need the primer or the heater at all. My dexta starts fine in about 10C with no heat or primer, but my injectors & pump have recently been serviced. If that doesn't work, try 40secs of heat before you crank her. Some owners have removed their primers completely, but prob not a good idea if you want to start below freezing.

The primer nozzle on the inlet is just that, sprays in a squirt when you pump the primer on the petcock. Important that it doesn't dribble when you stop pumping the primer, or it messes up the fuel metering by the injector pump.

The blobs on the ends of fuel pipes are olives - fairly standard fittings of the day.

Navigating around the online parts list is easy, just point and click on the line marked 'location' or the index to the left of the diags.

[tom lad]

does that primer , atomiser have a tap to turn on before u use the primer , like on my super dexta ?? 1/4 turn on , 1/4 turn off.
I've never worked on the pneumatic governed model.
( my atomiser doesn't work , seems to be blocked solid , engine starts fine , but generally above 5 c here. )

[NateSurvey]

OK! I got her running. She would not kick off with just the starter. We had to pull her. It now looks like we should replace the intake air hose, (it was in poor condition, and I ripped it more) and it seems to have quite a bit of blow by. And, it has an oil leak, in the lower instrument panel. (That would be right down below the steering wheel, and fuel tank, where the pressure gauge is) I suspect it is the tube to the oil pressure gauge. And, so it seems we have a runner. Thanks guys for all your help. I found the air intake hose on ebay for around 40 bucks. Maybe the rings are a little stuck, as she has not run in a while. I did put about 10% transmission fluid in the diesel, to lube stuff. I expect to add about 8 oz of trans fluid to the fuel, as in the USA our diesel has been dried out alot... not as much oil as it used to have in it.
So, list to fix is:
New line from tank to primer, and a nozzle on the end, at the intake manifold.
New line from the tank to fuel pump.
New fuel filter. Make that 2 filters. One between tank and pump, and one between pump and injector pump.
Change the motor oil, and filter.
Clean the oil bath filter, and add fresh oil.
And, a few missing bolts and nuts in various places.

This list will probably grow!

Thanks for all your assistance.

Nate

[Bensdexta]

OK! I got her running. She would not kick off with just the starter. We had to pull her.

Congrats - good work!
Sounds like you're a Dexta natural.

[NateSurvey]

OK, another problem came up. Lots of oil appears to coming out around the fuel injectors... (could be the valve cover gasket) but I think it is the fuel injectors. We have to clean it all up, and start her up, and look carefully. (before it gets so much oil you cannot tell where) So, perhaps I will wind up removing the injectors, and replacing O rings, or seals around them?

Life is like that, you know. Fix one thing, and another goes wrong!



N

[Jerry Coles]

hi Nathan
pick up some of the oil on your finger and smell it. Does it smell of Diesel? Is it thick viscosity or thin and watery? Sooty or just black?
I would clean out the space down the side of you injectors and see if the oil is coming up (injectors) or is it running down (Rocker cover gasket). As a quick check remove the rocker cover and inspect the cork gasket. Clean with cellulose thinners and smear some gasket sealant on it and replace and try again. Remember oil can come out from under the gasket somewhere else and weep round to the injector side.
If you pull the injectors you must replace the copper washers with proper 'annealed' washers (standard size from any engine shop/dealer) as they are soft and provide the seal. Make sure the old washer is not left down the hole!
Regards
Jerry

[tom lad]

my cover leaked ,
only a new cork gasket cured it
original cork had gone hard ,brittle , miss shaped .