How does this cylinder piston damage happen?

[Shawnba67]

So how on Earth can this backhoe swing cylinder get damaged in this way?
I tore it down to reseal for a leak and well more $$$ needed. Lol
The parts manual shows a bushing in the threaded end piece (gland?), does anyone know if I can replace that or does it get reamed to final dimensions after install or such?

 

[North Idaho Wolfman]

It would really help if you told us what this cylinder fit.
It looks like the end of the piston broke and blew out but there may be more involved.

 

[North Idaho Wolfman]

M59 BH boom cylinder right?

That's a very Unique cylinder!

It looks like the control end is broken off.
I do believe the control end keeps the piston from slamming into the bottom of the cylinder.
And that part probably caused the break in the piston.

Did it blow a hydraulic line under use?

It looks like you will have to replace the entire cylinder, because I'll bet there is damage inside the piston bore.

 

[#40Fan]

So how on Earth can this backhoe swing cylinder get damaged in this way?