Track pin pusher

I would think so...may have to go to a 6-wire hydraulic hose (5000 psi rating)

That's just another hydraulic cylinder. Depends on how much force you wish to generate. For small stuff you might get by with 40-50 ton. Bigger stuff is 100 ton minimum.

To pop out track pins even on small stuff like a 20 Excavator you really need a 100 ton cylinder that will work safely with upto 10'000 psi stuffed in it, track press cylinders are real heavy built jobs so the thoughts of a log splitter cylinder having any chance being built to take only 2 or 3'000psi max' is not in the spot for this sort of work.
tctractors

Force equals Diameter squared X ,7854 which equals the area of the piston X pressure in psi equals FORCE applied.

A 4" diameter piston has a surface area of 12.566 square inches X 3000 psi gives a force of @36,700 lbs.

You can gain more force by increasing either, or both the pump pressure, or the area of the piston.

36000 lbs is around 13 tons, nowhere near enough to look at a track pin. The smaller of the two types of Cat press is barely big enough for anything over a D5 and that is rated at 70 tons.

Ok, I have 2 955 track loaders, would one of those cylinders be sufficient?

Ok, I have 2 955 track loaders, would one of those cylinders be sufficient?

probably not, i suggest do it right because at these pressures if anything goes wrong it can be fatal !!

Pressure in the hydraulic system isn't that critical, it's just another variable. It's the size of the ram & the pressure that matters, so a larger ram with lower pressure can make the same force as a smaller one at higher pressure. The higher pressure unit will be smaller and lighter though, hence easier to move/use.

A big log splitter might make enough force, but it's not really well setup for the use. A log splitter is designed for a load distributed across the wedge/foot (as you'd get from a log being split), not centered in a specific area as you would have from a press use. You would probably want to set it up so the the track pin in centered about the center of the ram to minimize binding from side loads.

Also, I suspect many log splitters are somewhat overrated on force - if you do the calculations with the ram size and actual rated pump pressure the theoretical force comes up somewhat less than what's advertised. I would also expect that the system is speced for a limited duty cycle at high pressure since most splitting use requires full pressure rarely and generally uses low to moderate pressures. A track press would likely use higher pressure more frequently/longer, and might cause abnormal pump wear or overheating.

Generally speaking it would not be that hard to build a functional homemade press, but the forces involved are not trivial, and there is a very real chance of injury/death if anything fails.