I have a 1980 John Deere tractor 310a- the piston broke- how do I get the old piston out and the?

If you do not have a basic understanding of diesel mechanics, then I surely cannot give you a complete description in this small space. Basically, pull the head, drop the oil pan, detach the piston rod from the crankshaft, remove the piston.

Whether the broken piston has damaged the cylinder is another story!

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