P T.Suzuki Indomobil Motor is a business entity in the field of automotive industry that manufactures motorcycles and cars Suzuki brand. when the production process is high, especially on the machines contained in the welding section. The first step that must be done is to identify the critical engine. In the welding section there are three lines, namely frame lines, muffler lines, fuel tank and lines. After the identification of the critical engine is known that the critical engine in-line frame is MAG-06, a critical engine in-line fuel tank is MAG¬01, and the critical engine in-line muffler is MAG-03. Next is to identify the critical components of each of the critical engine. MAG-06 is a critical component of torch nozzle, and to MAG-01 and MAG-03 is a critical component of the contact tip. Calculation of Overall Equipment Effectiveness values (OEE) is performed to determine the overall effectiveness of each machine. Based on the calculations for the period January 2012-July 2012 MAG-06 had average availability of 85.11% with a mean value of 81.38% OEE, MAG¬01 average availability of 89.57% and average OEE of 82.65%, and MAG-03 average availability during the period January 2012-July 2012 amounted to 85.86% and the average value of 72.07% OEE. Proposed improvements MAG machine maintenance systems-06, MAG-01, MAG-03 and be done with lean lean approach assessment and preparation. Lean assessment to evaluate the process of total productive maintenance (TPM) MAG-06, MAG¬01 and MAG-03. The result is a lean assessment and preventive replacement time interval time interval and waiting waste and transportation wastelmin the process of replacing the component, then the lean phase preparation opose preventive maintenance schedule for machine MAG-06, MAG-01 and MAG-03 and minimize waiting waste and waste transportation to improve operational standard component replacement procedures. Having performed preventive maintenance on machines MAG-06 average availability increased to 91.49% with the average being 87.49% OEE, the MAG-01 machine average availability increased to 96.18% by value average OEE to 88.749% and the MAG-03 machine average value increased to 95.48% availability daengan average value being 80.2% OEE. Following standard operating procedures repair replacement torch contact tip and nozzle replacement time is reduced 81 minutes. Component replacement contact tip from the original takes 162 minutes reduced to 81 minutes and the replacement of the original torch nozzle components take 222 minutes to 141 minutes reduced.