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This is the style of pump it does have, on the left bronze side there's a piston moved by a cam that is fitted on the crankshaft. I've already checked the filter and the lines, they are not blocked. The oil tank breather is well to. I've been trying with ISO 40 oil, maybe it's too heavy for the...

Hi all, My name is Ivan, I`m from Argentina and I`m new here. I`m repairing my Oleo Mac 261 Automatic chainsaw and can not make the chain oiling system work, I see little or no oil coming out from the outlet hole. Changed the oil pump and it`s o`rings and no good results. One inquiry, does...