Lost operating and maintenance instructions. Need to know how much oil to put into the self lubricating chain reservoir and where it feeds the chain to make sure there isn't a blockage anywhere.

You are free to charge to the top if you think right to use a chainsaw. It is essential that the oil is clean. If you accidentally charge too much (full hopper) it is good the rest of oil put back in the oil bottle or to extend on the chain. It is important that it is not oil-free and should be cleaned around the chain for good lubrication.