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Ford 640

M

moday

Member
I am working on re-assembling a long project here....started a Ford 640 a couple years ago and I'm starting to re-assemble. I found the old pictures when I started, looks like the rear wheels are set up for 60" on a row crop versus what the manual shows as 60" on a general purpose. Sorry if a poor question, but I assume that this is a row-crop as the front axle has all the adjustments for tread width.

1) It is correct to call this a row crop and not a general purpose tractor, correct?

2) Is 60" rear width the normal for just a hobby tractor? I don't plan to use for planting or anything, it was really just a project. I need to get rubber back on rims and I want to get it right.

The 60" tread with plan that I plan to use has the rim bracket on the outer side and the wheel (holes for lugs) will be on the inside of the bracket. I see it like this in my service manual and that is how the tractor was when it came to me. I kind of figure leave it that way but hoping to get some advice or agreement if this is acceptable from someone who has more knowledge.

I hope this makes sense. thanks, MODAY
 
The 640 is a general purpose ag chassis tractor with an adjustable width front axle. The equivalent in a row crop model would be a 740. The 6xx and 8xx models were general purpose ag chassis tractors and the 7xx and 9xx models were the row crop tractors. The row crop models had double reduction gearing in the rear axle with the final reduction gears in a drop down box at the end of each axle, so the centers of the main axle shafts were above the centers of the wheels. The ag chassis models had singe reduction gears and the wheels were centered on the axle shaft centers.

As to your question on what width to set it for, that is entirely up to you. If you are not planting or harvesting crops in rows and are just using it for brush hogging and loader work then generally a wider stance is more stable so most folks go as wide as they can without hitting any obstacles on their property or the width of their trailer.
 
I used to have a 641 with the wheels set at 60 inches. Thats a good setting for bush hogging, box blading and such. I use a 6 foot mower and 5.5 foot box blade. Tire tracks are covered nicely and as mention tractor is stable.
 
I think the 60" setting for center of tire to center of tire is a good choice for the 8n, 600-800 series. They still feel very stable at that width (I'm not on any real steep hill sides), they go on a trailer easily, tracks are inside the width of a 6' blade or finish mower. Easy to haul, store, and use at that width.
 
So dont call a 600 series a row crop? I think the service
manual does as it shows adjusting front axle like you cant do
on 700/900 models. Thanks in advance!
 
(quoted from post at 10:55:43 03/09/21) So dont call a 600 series a row crop? I think the service
manual does as it shows adjusting front axle like you cant do
on 700/900 models. Thanks in advance!
Click to expand...

Having an adjustable width front axle does give it the capability to farm crops in rows, but having the adjustable front axle does not make it a row crop model tractor. Having a non-adjustable front axle would make it an industrial or utility model.

The Ford 700 and 900 series tractors, which were the first that Ford called row crop models, were originally only available with a narrow tricycle front end. The later added a wide front end option but it was different than the front axle of the general purpose ag chassis models and you could easily swap between the narrow and wide fronts. The general purpose ag chassis models like your 640 never had a narrow front end available for them.
 

600 is a utility model due to it's lower profile but the adjustable axle and tire widths allow for some row crop work.
We cultivated a lot of corn and tobacco with our 800 spread out the straddle two rows.
The 700/900 models are called row crops as their taller height allows them to clear crops better without damage to the crop.
 
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