just got one from flea market trying to rehab how much oil in those things and where get orings caskets or just try match something from metric I assume car parts store maybe get rehab kit if just know where no pressure at on it I got nose open and piston in hand no oil in cylinder but looks clean and shiny wont go more into it before try with oil and but piston back just how much oil on suckker its the smalles model I dont know number but its green thanks rallyblanco