D4D Serial number

That's a good s/n, 1964 model.

Thanks Old Magnet ,now i have to figure out how to remove equalizer spring and locate one or weld up the end of this one and plate it rides on

Here are the instructions for equalizer spring removal.

Seems you could just drop the spring after pulling the pin and jacking the tractor high enough but it does have to turn to get it out.

Not sure how successful weld repairs to the spring would be.

Thanks again , I have 4of the outside bolts off and was thinking there must be more inside frame rail as is still not moving . I was thinking if I can t find the main leaf of the spring I could weld the tapered end that slipped out and maybe get more use out of it , rather find a replacement but cost and time also a factor . The end of spring is worn to a sharp angle 45degrees or more and let it slip out . The pad it rest on is also worn down and is at least a inch shorter than right side and very thin and sharp. that also will get a new pad welded in . Also have to fix the roller that mounts on top of rail and hold track up in the center ,when everything let go the roller tore out of mount ,looks as though only one bolt was still holding other 3 rusted away .

Welding up the spring pad and retainer bracket is not the problem. It's dealing with the spring which I am sure is a heat treated item.

I can't find my 78A parts manual to help with the search for replacement.

hey there i had a broken bottom leaf on my d2 i pulled it out and took it to a truck spring shop they put the a new leaf in for 80 bucks

Still can't find my 78A parts book but the prior model 20J and the next after the 78A model which is a 82J use the same equalizer spring #4K8947. Fits several models.

Thanks Dan and old Magnet , Iwas thinking of getting it out and going to a spring shop in Tampa Ihave used for years on my Dump trucks and semi . to see if they can make a bottom leaf for this also. really don t want to weld it and still have to worry with it ,Rather fix it right once and be good for many more hours. Its not my machine and owner doesn t use it very often and wont sell it to me but has let me use it when ever i need it,and since my stroke and selling off my D7 17a and my D46u. I appreciate him trusting me to use the old cat. sure miss not seeing my own cats sitting where they were for years . Have a wedding to attend this weekend but will be back at it with help of my brother in law come monday,he is my muscle now ,lol.actually a old army tank maintaince sgt .so the cats aren t out of his expertise.

Problem is that's not just a flat spring, it is a tapered cross section, not that it couldn't be replaced by a multi leaf unit.