The Fordson Tractor Pages Forum

The ring seal was a square cross section, but an o-ring might be ok if you can't find a square one. Cup seals were fitted to all valves from 1458447, the ring type seals were not fitted from then onwards, and the valves didn't have the slot for them. I suggest you check bolts to be nice and tight as...

Nuts are 1/4" UNF and are supposed to be self locking anyway.
Sandy

The holes are blind, about 1 1/4" deep I think. Don't forget there is no original ROPS, they all came in many years after Major's were being made and as far as I know there was never a standard ROPS for a Major. Don't really know why no one offers seat belts though, as they are well proved to be ess...

For the front crank seal you need to check the pulley first to make sure there's no groove worn in it, as for the valves the cup type seals appeared on 1458447 rubber ring seals were fitted to a groove in the inlet valve stems only before then, and although Ford say to use only cup seals on all engi...

I would suggest new valve seals for now, as for the front crank seal they leak very often, but normally because of lots of use (the pulley gets a gouge in it allowing leaking past a seemingly perfect seal or even a new one). If the oil coming out gets worse under a heavy load then it might be that y...

The holes are threaded, and underneath they hold the check chain brackets and downswept exhaust, they're 5/8" UNC thread. You can't pass bolts through the casting without getting into oil unless you use the mudguard bolts. but that might be owkward for other reasons. The holes that hold the check ch...

You might find cabs but not with any supporting capability, most cabs you see though are still on tractors that tend to sell quite expensive.
Sandy

The level is indeed the indent near the bottom. Hope you cleaned everything well to avoid filings getting in. Agriline also have them out of stock. If you have issues with the brakes I would deal with them first, the steering box is a more delicate job during which I recommend you clean the fuel tan...

As long as it seals there's no problem, but I propose you swap the tubes (they're brazed onto the bowl), as it will give you more room. The early breather is actually 5/8", looks like Railswood have actually listed them both correctly, but they don't say if they're in stock or not. Looks like the af...

I would think it's more likely from neglect, although that can cause rust from both inside and outside, in most cases from the inside as incoming air is cold and damp, and you might well find condensation on the outside of the air hose on cold damp days. Rather expensive, but if it works it works. S...

I chose this pic precisely so you could see the mounting, the breather was beeing cleaned and was off at the time, but you should see the o-ring used in this earlier breather. From outside they look very similar, but inside they're not as similar. You will get an early top on a late bottom (but it w...

Can't see it I'm afraid. I suggest you try this: viewtopic.php?f=1&t=5024&p=53955#p53955
Sandy

The air enters the breather where it gets cleaned before going into the timing cover, it then goes into the main crankcase area before going up through the push rod holes (and two wee holes between the lower block and the tappet cover area where oil drains back simultaneously) to the rocker cover wh...

Before the Mk2 engine there was a pipe from the rocker cover to the intake manifold that would keep the crankcase under a vacuum, this was liable to issues due to the potential for leaks allowing the engine to run faster and also not really ventilating the crankcase (though still better than the con...

That does sound like the problem, as diesel engines must have an HD oil of sorts. Probably worth checking bolts are tight anyway though, you never know what that might fix.
Sandy

Definitely not for outlet, when they do blow, oil spills out (and that happens when you have poor compression or the rocker cover pipe is not properly fitted). Air goes in through the breather and is sucked out through the rocker cover into the air filter and eventually to the cylinders where these ...

For pics try this: viewtopic.php?f=1&t=5024&p=53955#p53955
I can't say much more than I said without a pic but it sounds like the std. external service plate will do you, as before use a modified repro filler cap for the return.
Sandy

You'll need to replace the seal(s) in the PTO casting, not a hard job but the NP uses a double lipped seal while earlier tractors use two single lipped seals back to back of a slightly different size (really early Major's had a double lipped seal of the same size as the two single lip seals but seem...

I don't know of any use other than the Major for these breathers. I suspect the later ones are unpainted as there are many Ebro tractors which also use these but are not blue (many spares were available from Ebro when Ford discontinued them as Ebro had Major's in production until the late seventies)...

This sounds good. The Boreham House courses were one of Brian's common stories, and I thoroughly recommend you read them as there are some amazing surprises there.
Sandy

I'm not expert on modern oils but 10W40 seems a bit thin, we use 15W40 and Brian uses 20W50, but it must be a mineral HD oil. Can't see if what you're using is mineral or not but I'm doubtful about whether it's an HD oil or not. There's no other ventilation on a Major engine, the breather on later e...

By the way saw some pics of yours where that pipe is visible.
https://people.zeelandnet.nl/hmdetroije ... derkop.jpg
https://people.zeelandnet.nl/hmdetroije ... 20(12).JPG
Sandy

Very definitely sounds like this pipe is blocked, try it again after cleaning to see if it improves. Ford recommended SAE20HD for cooler times and SAE30HD for hotter times but those are probably not easy to find as such nowadays. I don't think it's an oil problem either, but only time will tell.
Sandy

Look at the pipe from the rocker cover to the manifold, as if blocked it won't create the vacuum needed to stop what you're getting (taking the filler cap off should cause an increase in engine speed and covering the hole with your hand you should feel a suction). Probably worth checking bolts too a...

Others have said this before but I can't say for sure, as our spindles seem to all match each other. As for the cast marks I have no idea if they're supposed to identify both sides or something else, there's no reason the same marks couldn't be used for both as the splines are machined later. I'm gl...