ford 640 rear hub diagrams

Anybody got any suggestions on removing the collar with out the special tooling?

I was puzzled how the bearings got lube since the outer shaft seal stopped the diff. oil at the trumpent end. They're packed just like the front wheel bearings!!!

***New question. . . New collar, pt. 29 must be heated to 800 degs F. and reinstalled over the bearings/cup assy. As it cools it locks everything in place. Wouldn't that burn the grease up?
Thanks for the responses.

Regarding the heated collar, though the bearings and grease may get hot it won't be sufficient to hurt anything. That's how Ford did it.

Here's a diagram for you from a Master Parts Manual. I believe you'll want to look at the inset diagram. I believe that design was used on the 600's and 800's. As for lubrication of the bearing, it is packed with grease before you assemble the axle. There is a steel collar that is heated and then put on the axle that retains the backing pplate, bearing and bearing retainer. When it cools it won't move. There is an inner seal that is installed in the axle trumpet and an outer seal in the bearing retainer.

To remove the outer bearing retainer you must first unbolt it from the axle trumpet. Once the bolts have been removed you can pull the axle out. The brake backing plate, bearing retainer and axle will come out in one piece. You can then access the inner seal. To access the outer seal you must remove the collar. There is a special tool for splitting the collar(if you can find one) Or, you can drill through the collar on two sides and then split with a chisel; or if you are good with a torch you can cut part way and then use a chisel to split the collar. You MUST be careful not to cut into the axle. You can probably count on replacing the bearing and race if you use the torch.

There should also be some shims between the bearing retainer and axle trumpet that are used for axle end play adjustment. Be careful with these. You may want to get a dial gauge to check your end play and adjust accordingly. The corect end play is .002-.016". Torque on the bearing retainer nuts is 130-150 ft.lbs. The shims can be purchased at CNH. Reassemble in reverse order.
Hope this helps.

that is about a 19$ book, and you can get it to cover naa thru 900/1801 ( cen get it right here as far as I know.

Amazingle enough the CNH website shows this diagram in brilliant detail... check out parts 25 thru 29.. should shed some light on your mystery.

Go to cnh.com

click on ag, then north america, then parts search, then search for parts. a window spawns, then type in 640, search.. choose the ag all purpose tractor, then choose rear axle.. etc..

soundguy

I'd pack the bearings with grease on reinstall.. etc.

doublecheck your axle trumpets to make sure they are the correct ones.. though the do sound like the 600 series.. etc..

Soundguy