The Fordson Tractor Pages Forum

Hi,
I've got a few problems with my super major, oil leaks from where the injectors go into the head-is this easily cured?
Slight oil blowing from exhaust on start up- pressume it's the valve guides?
Last one, how do you flash the dynamo as I'm not sure it's charging?
Many thanks

Kev

There are little copper washers that seal the injectors. Pulling the injectors and replacing the copper seals should fix the leak. Be sure everything is clean.

If the tractor starts and runs well, I would not worry to much about a little oil on start up. If the tractor has been idled around, you may need to put a load on it and run it for several hours as idling around makes the rings stick.

If you are not sure if it is charging, the first thing to do is check it at the battery posts with it not running. You should be getting a reading of 12 plus volts. Start it and take a second reading, You should be getting a reading of around 13.5 to 14.5 volts. If not, then you are not charging. Depending on which way the battery is in the tractor, which should be positive earth, or + to ground. The negative - terminal, Or BAT to FIELD terminals on the regulator should polarize the generator. If it still does not charge then there is a faulty regulator, or Generator, or both. Dandy Dave!

thank you for your reply, I will have a go at the injectors, so i just undo the injector pipe and obtain a puller to pull them straight out?
still cant get my head around the dynamo bit, i never was any good at electrics, i havent managed to get a reading at the dynamo, the battery before start up is 12.4 then once running is 12.3?

kev

A reading of 12.4 and 12.3 means you are not charging. Take the regulator and generator to a local rebuild shop and have both tested. Most electrical rebuilders will test the units for free. If they can supply the parts that are necessary, buy them, or have the generator rebuilt there for good business relations. If they say they cannot obtain the parts then you can get new units, and some parts from Agriline. Also, when they test it, it will be polarized. 90 percent of the time the regulator is bad, or it also could be faulty wiring which is not uncommon on a 50 plus year old machine.

The injectors do come straight out. Cleanliness is very importiant. If yours are leaking, they will likely come out fairly easy. if not, then you will need to soak them with a Penetration Oil and work them out carefully. Others on this board may have some advice in this area. Dandy Dave!

Hi
Was just reading the post on your injectors and the oil leaks . I think you are meaning engine oil is coming out round the seals on the outside of the head where the fuel line screws on ?. if thats the case they are hard to stop. that piece is a rubber seal that needs to be replaced. when i put the new ones in when rebuilding motors, i put sealant round the fitting on the injector and round the outside of the rubber before putting the injector back in the head. after about 3 weeks they leak again most of the time. i think in 20 odd years i've only had maybe 2 tractors that didn't
Regards Robert

With that said, a photo or two of where the leaks are would be good. Dandy Dave!

Thank you both for your helpfull replies! I have ordered a new dynamo as I found a crack in the main body and few other loose bits, not too sure how it cracked? I need to get new bulbs for the dash lights as I have fitted a new loom. I'm probably not going to worry about the oil leaks from the injectors just yet, it's just annoying it marking the fresh paint.

I think I will replace the control box too, dynamo only reaches 1.3v at high rev, then when engine is off there is feed back to the dynamo of about .34v? Also my charge light does not work at all now, I've got a agriline harness fitted, but can't trace the purple wire from the bulb holder, I presume this wire would be cut into the loom somewhere and join the control box?

The generator light, and wire that feeds it should be wired into the "D" (dynamo) terminal of the regulator. The light will only light when the tractor is off. I would say that your regulator is faulty and you should replace it. Dandy Dave!

Generator and electrics sorted now and all fully functional, does anyone know of where I can find the rubber injector seals as the oil pouring out I'd getting a bit annoying

Rubber injector seals? On the injectors, or on the injection pump. Please explane further. Oil is pouring from exactly where? Look at the topic, "Oil Leak Help". Is this your problem? Dandy Dave!

Hi dave, yes exactly the same place but worse sadly

I haven't seen those sold separately. You'll probably have to buy a top end gasket set.

Thanks for that, are they easily replaced?

Yes. Remove the valve cover and the injector lines. Unscrew the short pipe that threads into the injector and goes through the rubber seal. Slide the pipe and seal up to remove it. Slide the new seal on to the pipe, slide it back down into the head, and tighten the short pipe back on to the injector.

I forgot to mention that there's a copper sealing washer between the short pipe and the the injector. Be sure that you don't drop it.

I've sourced the rubber seals, and replaced them. No sign of the copper washers I presume they stayed put when I removed the short pipes I will run the tractor for a few days then probably remove rocker cover to check everything, I also replaced the lift pump as that was blowing oil badly out of the small breather hole, I now have( touch wood ) a fairly oil leak free SM engine. I did the other week put her on a dynomometer at a rally, I recall she put out around 44hp, is that near where she should be?

Its good to hear that you got your leaks fixed.
Your engine is rated at 51.8 horse power, without accessories, so I don't know exactly what the PTO horsepower should be, but I'll bet that 44 is pretty close.