Greeted Mr Ward at the entrance of the home, he invited me in and showed me to the basement were the boiler was located. I cut off the oil supply and proceeded with the tuneup. I replaced the oil tank filter and the fuel pump strainer. I opened up the combustion chamber and removed the gun assembly, I replaced the nozzle with a 85/80B, I reassembled the gun assembly and closed the unit. Finally I connected the bleeder hose and bled the oils lines. Customer is happy with service.