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Ford 640 cracked front Axle

N

nashranch

Well-known Member
Taking apart the front end on my 640 to try and repair the front axle that I discovered was cracked. Having a hard time unscrewing the pivot pin..soaking now in PB blaster. May try a little heat after while. Can this axle be welded ?
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Those are made of a good drop forged steel.
Yes, they can easily be be welded. Vee it out
good and fill it with weld.
I would use 7018 rod. No special pre or post
heat needed.
 
(quoted from post at 09:34:07 02/14/18) Those are made of a good drop forged steel.
Yes, they can easily be be welded. Vee it out
good and fill it with weld.
I would use 7018 rod. No special pre or post
heat needed.
Click to expand...

Thank You UD
 
I had a pin that was a bear. I actually welded a piece of 1/2" thick wall tube that was cut to fit in the slot to the pin. After that it took a pry bar about 4' long with heat to move it. It came out hard most of the way. Let it cool a little after heating.
 
(quoted from post at 12:22:29 02/14/18) I had a pin that was a bear. I actually welded a piece of 1/2" thick wall tube that was cut to fit in the slot to the pin. After that it took a pry bar about 4' long with heat to move it. It came out hard most of the way. Let it cool a little after heating.
Click to expand...

I finally got the 1 5/8" nut loose on the pivot pin and backed out a bit till it ran outta threads but there seems to be a sleeve on the pin that is of course rusted on so it all just turns but won't back out. been heating and beating but she is a no go for now. any suggestions out there??

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Not sure if theirs a sleeve on the pivot pin but maybe the threads on the end of the pin have stripped out so I'm just spinning in one spot. Not sure, It screws back in ok
 
The earlier tractors had a pin or a bolt holding them in with no
threads to back them out and nothing to get a hold of to pull on really.
So what I did with those is take the bolster off the front of the
engine and drive them out from the back side once I got them
to turn a little side-to-side.
If yours has backed out so that the threads are clear, maybe you
can do the same thing with it now that it's loose.
 
(quoted from post at 16:40:55 02/14/18) The earlier tractors had a pin or a bolt holding them in with no
threads to back them out and nothing to get a hold of to pull on really.
So what I did with those is take the bolster off the front of the
engine and drive them out from the back side once I got them
to turn a little side-to-side.
If yours has backed out so that the threads are clear, maybe you
can do the same thing with it now that it's loose.
Click to expand...

Now Royse... threads are still visible but the whole thing just spins. Pretty sure the threads are stripped out. I have tried heating and beating at this point... does no good. Cutting torch is probably the next step
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I'm open to suggestions
 
Well its apart finally in pieces. Ended up cutting it out with my grinder and a thin cutoff wheel. The center pin was totally bonded to the outer sleeve so I was never gonna get it apart by unscrewing it. Now to weld up the axle and order in new parts to remount it.

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Not much threads left in the Bolster
 
Glad you got it apart, now to get it back together.
What's throwing me is that pin. It just doesn't look right to me.
It looks like the axle pin on my 3000, not my NAA or earlier.
It's been too long since I did my 640 to remember what it looked
like, but I'll take a look through my pictures and see if I can find it.
 
(quoted from post at 20:20:40 02/14/18) Glad you got it apart, now to get it back together.
What's throwing me is that pin. It just doesn't look right to me.
It looks like the axle pin on my 3000, not my NAA or earlier.
It's been too long since I did my 640 to remember what it looked
like, but I'll take a look through my pictures and see if I can find it.
Click to expand...

I know what you mean Royse, it doesn't match up with the New holland parts breakdown for a 640. The pin measurement you see in the pic does match the pin in the YT parts.

http://www.yesterdaystractors.com/Ford-600_Axle-Pin-Threaded_NCA3127A.html

What bothers me is the measurement I get on the inside of the front axle. I don't see a replacement bushing that matches my measurements. Not even close


http://www.yesterdaystractors.com/Ford-600_Axle-Pin-Support-Bushing_2N3039.html
 
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