Ford 4000 and Ford 4000

When researching Ford 4000, how do you differentiate
between older 4 cyl 4000 and the newer 3 cyl, 4000?

I understand the newer 3 cyl. diesel 4000 is a
pretty good dependable tractor. Are there any weak
spots I should look for?

Bill

The two versions are really entirely different tractors. I don't believe they share any major components except the Selecto-speed tranny on some models. The experts here may correct me on that.
Earlier ("prior") and later tractor specs:


Early 4000

Late 4000

Not sure what you mean by how to differentiate between them when researching them.

The earlier 4 cylinders 4000 was made from 1961-1964 and the newer 3 cylinder 4000 was made from 1965-1975.

If you're searching documents on the internet, and if the document doesn't specify which it is, either by the number of cylinders or the year, then you have no idea what they're talking about, although you might be able to get clues from other features that are mentioned, or from pictures if any are included.

In the gasoline varieties, the earlier 4 cylinder 4000 came from the factory with a Marvel Scheiber carburetor and the later 3 cylinder model came with a Holley, but many of both varieties have been replaced over the years by Zenith carbs, so if you find something that mentions a M/S carb then it's almost definitely an earlier 4000 and if it mentions a Holley then it's almost definitely a later 3 cylinder, but if it mentions a Zenith then you can't be sure.

On the diesel versions the earlier 4 cylinder 4000 came with a Roosa Master (now Stanadyne) injection pump and the later 3 cylinder came with a C.A.V. injection pump.

The earlier ones only came with a 4, 5 or 10 speed (S-O-S) transmission and the later ones only came with a 4, 6, 8 or 10 speed transmission, so if it's got a 5 speed it has to be the earlier one, and if it's got a 6 or 8 speed then it has to be later one.

In any pictures that you find look for the following clues, depending on if the pictures show enough of the tractor and enough detail to see any of these features:

The earlier ones had sheet metal that resembled the earlier hundred and '01 series and the later ones had square grill housings.

The earlier ones had rounded axle trumpets and outboard drum brakes and the later ones had square axle trumpets, double reduction rear axle and inboard wet disk pack brakes (Look for a large diameter round section to the axle trumpets for 6 or 8 inches at the ends closest to the center housing and then reducing in size where they change to the square profile).

The earlier ones had an all-in-one manifold with the intake and exhaust on the same side of the engine. The later ones had separate manifolds with the intake on the right side and the exhaust on the left side (relative to when you're sitting on the tractor).

Overall, the 3 cylinder 4000 with the diesel engine is a very reliable workhorse. One thing to look for is whether it has been run with coolant conditioner or not, as those run without the conditioner may have issues with cavitation and may eventually develop pinholes in the cylinder walls. Other than that, just look at the overall condition of the tractor to try to determine if it has been well maintained over the years.

ditto what the others said. 2 completely different builds.

do you have specific questions to ask?

Both early and late 4000's had the SOS available, but they used different versions of the SOS - the whole casting is different.

Sean, That was my problem when I researched them on this site. Could not tell which 4000 they were talking about. Same on e-bay. You answered a lot of my questions. How much trouble can the SOS be? It is just a selector, not anything like hydrostatic? Do all of the 3 cyl 4000's have live power and power steering?

thanks again,

Bill

How much trouble can the SOS be?

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The S-O-S transmission of the later 3 cylinder 4000 series, if properly maintained and adjusted, is a very strong and reliable transmission. That's what I have in my '73 4000 and it works great. If it has not been maintained properly then there could be problem. Also, if it is not adjusted properly you can have problems. The proper maintenance and adjustment, while a little more involved than just changing the fluid and filters, is not that difficult. If you do end up getting one, get the proper manuals and follow the procedures and it should provide you with good service. It is a 50 year old piece of equipment though and there could be something worn just like any other piece of equipment of that age.

It is just a selector, not anything like hydrostatic?

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The S-O-S transmission is not a hydrostatic transmission. It is a gear drive transmission in which the shifting of the gears is controlled by a hydraulic selector valve, which in turn engages and/or disengages various servos and clutches in a series of planetary gear systems, so that when the transmission is engaged in any particular "speed" or "Gear" the output of the engine is directly engaged with the pinion gear in the differential through the torque limiting clutch and the planetary gears. There is no hydraulic or viscous coupling between the engine and the drive axle like you have with a hydrostatic or even a torque converter.

Do all of the 3 cyl 4000's have live power and power steering?

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Power steering was not standard on the 3 cylinder 4000 series. It was an option.

I'm not sure what you mean by "Live Power". All Ford tractors starting with the 1953 NAA had live hydraulics. Live PTO was an option even through the later 3 cylinder thousand series with all of the manual transmissions except the 4 speeds, which did not have the live PTO available at all. The Select-O-Speed transmission tractors all had independent PTO, even the ones on the earlier 4 cylinder thousand series, and the '01 series as well.