D2 5J - Engine locked up - Options?

My exhaust stack pipe mount can definitely do with some fixing. No way it can come in from the TOP ITSELF since it has the flapper. The base is another matter. Rain here is infrequent enough that windshield wipers are left to decay for a year at a time until the last possible moment since it's wasting money otherwise. That infrequency makes easy to overlook things you plan on making rain tight "one day". Doesn't take much rust to make a cylinder or 2 stick. Can't count how many times I've told myself "I need to fix that stack" only for it to get forgotten.

Soon as the chance is had the soak will begin. I might be able to work my 6' 2" x 235lb frame down between the blade & hyd pump to get access to the drain. Otherwise it's either opening the hydraulics or wedging the control lever back then use the tractor to raise the blade as high as possible then make excessive use of blocks to hold what must be 1000 pounds of guillotine up. Might also take a pliable metal rod & poke down in through the stick hole then see if the end comes back discolored or more wet than it should.

I am knee deep in a 1955 5U project, which had a stuck engine (water entered via the cracked exhaust manifold) and stuck clutch. The machine sat for 20-ish years and engine is now free, as is the clutch, however my process went something like this:

1) Attempted to remove the glow plugs, to get some kind of lubricant into the cylinders. I was instantly successful.......in breaking off all of the seized glow plugs. Ugh...
2) I fully committed and removed the head. (not difficult, just tedious due to rusty fasteners) Upon doing so, i immediately discovered the two center cylinders were the issue. Rust was present and they weren't prom queens. I filled all four cylinders with ATF and left it to set. As time (Months) passed, the front and rear cylinders drained through. After 2-3 months, I removed the fluid from the center cylinders and struck the tops of the pistons, with a 2 lbs hammer and an oak spacer. No movement..... I refilled all four cylinders with PB Blaster....and left them to rethink their poor life choices.
3) I decided to embark on the clutch issue. (Thankfully the machine is a late model with the large clutch access plate) Using a 3'-4' Snap-On prybar and being careful to not bend or break anything. I free'd up the over center links for the pressure plate and in the process, rotated the flywheel about 10 degrees.
4) Surprised and basking in celebratory excitement, I added another can of Blaster to the cylinders and slowly (gently) rotated the flywheel back and forth until 360 degrees was of rotation was attained. Add more blaster and several more complete rotations....
5) I used my hone and cordless drill to clean up all four cylinders and am now waiting for the head to return from the machine shop. (Hot tank. Mag, Surface, Valves and new glow plugs. I will also be replacing the injector o-rings with new ones from Cat.)
6) Clutch was disassembled and removed for clean up, etc.....

Good luck!

My exhaust stack pipe mount can definitely do with some fixing. No way it can come in from the TOP ITSELF since it has the flapper. The base is another matter. Rain here is infrequent enough that windshield wipers are left to decay for a year at a time until the last possible moment since it's wasting money otherwise. That infrequency makes easy to overlook things you plan on making rain tight "one day". Doesn't take much rust to make a cylinder or 2 stick. Can't count how many times I've told myself "I need to fix that stack" only for it to get forgotten.

Soon as the chance is had the soak will begin. I might be able to work my 6' 2" x 235lb frame down between the blade & hyd pump to get access to the drain. Otherwise it's either opening the hydraulics or wedging the control lever back then use the tractor to raise the blade as high as possible then make excessive use of blocks to hold what must be 1000 pounds of guillotine up. Might also take a pliable metal rod & poke down in through the stick hole then see if the end comes back discolored or more wet than it should.