Finding a manual for an old Komatsu Machine?

[OldTowGuy1]

I hesitated to post this question about a mini-excavator, but figure nobody knows where I live. I inherited a big pile of parts that appears to have been a very old Komatsu PC20. It was on a trailer headed to a scrap dealer, the owner was a friend of mine and gave it to me. It's all there but he believes it has a broken crankshaft, which he had just replaced. My question is if there is a place on the internet where I can get a pdf manual at a reasonable price? I see a lot of places have them for 100$. It's a 1992 PC20-5, figured I would try to find a manual before I tore into it, but don't want to start off by sinking a lot of money into it if I end up just completing it's journey to the scrap yard. If this post isn't allowed because it's not a tractor then admin please delete it.