D4 dozer

The classic answer to your questions is "a parts machine"......... Or several!

Both the tracks and the hydraulic cylinder rods are expensive parts of the whole dozer package and quite a few are scrapped or parted out instead of replacing those.

On the positive side, both are available from aftermarket sources or sometimes even as CAT Classic parts from the dealer at a substantial discount.

How about some pictures?

While I'm by no means an expert here you can get the cylinders rebuilt for under 1,000 for the pair including new shafts IIRC.

The pin and bushing? How are the rails and under carriage?

Now throw in that it was your dad's? I know a lot of guys looking for old family tractors who really regret letting them go in the first place. You can't replace that especially if you and your dad was close.

Me? I'd be fixing had it been my dad's.

Rick

Thank you for your reply. The cylinders I expect to be in that ball park also, I can get aftermarket cylinders for around $800 but I would have to alter or fabricate the way they would mount and I’m not sure I want to mix and match like that .As for the rails and undercarriage I assume your asking about the links that make up the chain assembly and the rollers. I have read and looked at quit a few posts and pictures since April when my father died by comparison it’s all worn heavily the bushings are gone on the bottom side it’s riding on the pins and it must have some bad lower rollers on the right side because I’m seeing wear up the side of the link and against the boss for the pin. I would like nothing more than to restore the old girl for my dad but I’ll have to take little bites so to speak. The sprockets are worn but not as bad as a lot I’ve seen posted. I’ve read it’s possible to weld them up and have considered doing that. I will post some photos when it gets daylight

More than likely you need a better set of chains. Look for a parts tractor for yourself. Maybe one will come along that has the parts you need.

Here's my take on anything I own that's old. Get it running first, make it move second, then stop third, after that everything else is gravy. If it won't do those first three things, you're wasting time, energy, and money. IMHO.

Zeke

are the lift cylinders leaking badly? You may get away with them for a while if not leaking too bad, so you could concentrate on the undercarriage. sprockets can be welded up but more common is to weld on new sprocket rims. Rollers can be built up with weld but you have to check shaft and bearing play in them---the same with the idlers.

Here are some pics the pony motor runs the Diesel engine runs it’s an old dozer with a lot of hrs on it.

are the lift cylinders leaking badly? You may get away with them for a while if not leaking too bad, so you could concentrate on the undercarriage. sprockets can be welded up but more common is to weld on new sprocket rims. Rollers can be built up with weld but you have to check shaft and bearing play in them---the same with the idlers.