C-60???

[Blueigger23]

Hi I'm new to this site , but trying to find information on a dump truck I just bought. It's a 1969 GMC 6000 I think it's a C-60 not sure though. This is my first dump truck and I've got a few problems already. I just purchased a reman. hydrovac booster the other day for it. Then I had to replace the u-joints and knuckles now I think the hydraulic pump went out. Something is knocking really bad under the truck when I engage the dump. I pulled the pto off thinking it was it but it looks ok the hyd. pump is shot I think I can't turn it all. Where can I find parts like bearings and gaskets for the pto and hydraulic pump? It's a Chelsea pto, if at worst case where can I find new parts? Thanks for all help.
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