Fluid change for early Ford 640

wcrow

New User
I recently purchased a 1954 Ford 640. I don't know the history, so I have decided to change the fluids. I've ordered the manuals, but they haven't arrived yet. What weight/type oil should go in the tranny, rear axle, and hydraulics?
 
Welcome to the forums!
I use UTF that meets the Ford M2C134D Spec in my tractors.
It can be bought at TSC, WalMart, etc. in 2 and 5 gallon containers.
The rear end you may want to use an 80/90 gear oil in.
A lot depends on your location/climate.

Got a picture of this tractor? The NAA was made in 1953-54.
The first 640 model year was 1955 so I'm wondering which it is.
Does it have a big nut in the middle of the rear wheel hub?
 
(reply to post at 20:13:49 07/08/18)Got a picture of this tractor? The NAA was made in 1953-54.
The first 640 model year was 1955 so I'm wondering which it is.
Does it have a big nut in the middle of the rear wheel hub?

The hundred series actually started production in late 1954 for the 1955 model year, and if you do research on the serial numbers you'll see that serial numbers for hundred series tractors made in 1954 are from 1 - 10614.
 
(quoted from post at 22:29:55 07/08/18)
(reply to post at 20:13:49 07/08/18)Got a picture of this tractor? The NAA was made in 1953-54.
The first 640 model year was 1955 so I'm wondering which it is.
Does it have a big nut in the middle of the rear wheel hub?

The hundred series actually started production in late 1954 for the 1955 model year, and if you do research on the serial numbers you'll see that serial numbers for hundred series tractors made in 1954 are from 1 - 10614.
I understand that production started in 1954 Sean but they
were still 1955 model year, right? If his is a 1954 model
year NAA, engine parts may interchange fine but hydraulics,
rear end, etc. may not. Like that axle nut. Kind of a fine line,
but having owned both I know not all parts are the same.
Fluid, however, is the same in both.
 
(quoted from post at 22:47:13 07/08/18)
(quoted from post at 22:29:55 07/08/18)
(reply to post at 20:13:49 07/08/18)Got a picture of this tractor? The NAA was made in 1953-54.
The first 640 model year was 1955 so I'm wondering which it is.
Does it have a big nut in the middle of the rear wheel hub?

The hundred series actually started production in late 1954 for the 1955 model year, and if you do research on the serial numbers you'll see that serial numbers for hundred series tractors made in 1954 are from 1 - 10614.
I understand that production started in 1954 Sean but they
were still 1955 model year, right? If his is a 1954 model
year NAA, engine parts may interchange fine but hydraulics,
rear end, etc. may not. Like that axle nut. Kind of a fine line,
but having owned both I know not all parts are the same.
Fluid, however, is the same in both.

Royce,

I assumed, since he said that he recently purchased it, that he had researched what he had on the internet and that it was a 640 made in 1954 for the 1955 model year. You are correct that my assumption may be incorrect, so let's wait to see if he responds.
 
According to the model/serial on the tranny, it is a 640 and the s/n(835) it was made in 1954. I guess I will use UTF in the tranny and hydraulics and 80/90 gear lube in the rear axle. I live in western CO. and the tractor is mostly used for mowing weeds along my irrigation ditch.
 
Thanks for the prompt replies. I pulled the fill level plugs on the tranny and rear end. It looks like hydraulic oil is in both, so I guess I will go with the hydraulic oil all around. I'm sure I will be having more questions in the future as I try to keep this old girl working. I have already noted some problems with the 3pt with the heavier implements. Will look into this more as I change the hydraulic oil.
 
"I have already noted some problems with the 3pt with the heavier
implements. Will look into this more as I change the hydraulic oil."

Might be a good idea to look into it more before changing the oil.
Could possibly avoid doing it twice.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top