TURBOCHARGER GP 1030655 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Turbochargers
Inspect/Check
If service is required, contact your Caterpillar dealer for turbocharger service options.1. Remove the exhaust outlet piping and inlet piping from the turbocharger.2. Turn the turbine and compressor wheel by hand.3. The assembly should turn freely. It should be difficult to detect movement of the shaft in the bearing. If the shaft is loose in the bearings, an inspection of the internal components should be made.4. Inspect the turbine wheel and compressor wheel for contact with the turbocharger housing.5. There should not be any visible signs of contact between the turbine wheel or compressor wheel and the turbocharger housing.6. Visually check for oil leaks.7. Repeat the above procedure for the other turbocharger.Overhaul
The Maintenance Management Schedule gives Caterpillar's recommendation for performing an overhaul. The interval is expressed in total amount of fuel consumed as well as Service Hours, WHICHEVER OCCURS FIRST. The best figure to use is total fuel consumed, even if this figure is estimated. Fuel consumption more closely follows the load upon the engine.The hours figure is an average value for a reasonable load factor. The hours figure will be too high if the engine is run at high load and too low if the engine is lightly loaded.Use the fuel consumption or service hour figure only as a guideline. Other factors, such as how conscientiously preventive maintenance has been performed, fuel quality, operating conditions, S O S results, etc., are important in deciding when to perform an overhaul, as well as some important economic points to keep in mind.All 3516 High Output marine engines should be scheduled for Overhaul using the following schedule: Caterpillar has chosen the recommended overhaul periods with total operating costs in mind.As an example, consider the following graph. 1. The solid line shows the maintenance and repair costs for an owner who followed the maintenance and repair recommendations for inspection, repair or exchange for components and for overhauls. The peaks represent the years in which top-end overhauls and full overhauls occurred.2. The dotted line represents another user operating identically except he has chosen to operate beyond the Caterpillar recommended intervals. His peaks also represent years with top-end and full overhauls.Notice that in the early years, the "repair-after-failure" philosophy is a little less expensive. Also notice that the first top-end overhaul and overhaul were each delayed one year. But notice also that the peaks for this graph are significantly higher than the peaks for the customer using the "repair-before-failure" philosophy.The higher peaks result from two key factors. First, waiting until a component fails or wears out means more likelihood of an expensive failure, requiring more parts, labor and cleanup. Second, excessive wear means less components will be reusable, or at least will need more labor to salvage or repair.In this example, extending overhaul periods 2000 hours resulted in total maintenance and repair costs increasing by almost 30%. There is