You can get the best in Industrial Gearbox Repair and Pump Repair by PPG Works! This is just a collection of pictures we have taken on this. LUFKIN Gearbox Repair. from actual job we have executed for a customer in PA. We are the best in Industrial Gearbox Repair and Industrial Pump Repair in the USA. No Job Is Too Big or Too Small when it comes to Gearbox repair with PPG works.