CONDITION: Shaft bearings worn from contaminants in the lubricating oil. CAUSE: Poor add oil procedures – extended oil/filter change intervals. RECOMMENDATION: DO NOT REUSE: To minimize wear rates and maximize component life, use recommended engine lube oil, maintain proper oil level and follow recommended schedule for oil and oil filter changes. CONDITION: Thrust bearing worn… Read More »
CONDITION: Compressor wheel comes in contact with compressor housing CAUSE: Any contact of the compressor contour is similar to the contact on the turbine housing and results from worn or failed shaft bearings. RECOMMENDATION: DO NOT REUSE: If wheel is making contact on only one side, either bent shaft or imbalance. Be sure to determine… Read More »
CONDITION: Compressor blade broken CAUSE: The blade either came in contact with a foreign object (such as a screwdriver or wrench) or was fractured from careless handling. RECOMMENDATION: DO NOT REUSE: Determine the cause of damage, observe handling procedures. Caution – Always use the recommended inlet guard while performing any service operations to the turbocharger.… Read More »
CONDITION: Broken bolts in turbine housing CAUSE: Excessive torque on bolts or incorrect tensile strength bolts used. RECOMMENDATION: REUSE AFTER THE BROKEN BOLTS ARE PROPERLY REMOVED FROM THE HOUSING: If the threads are dam aged, repair with thread inserts and replace all of the bolts with new bolts. CONDITION: Turbine housing contact from turbine blades… Read More »
CONDITION: Worn turbine wheel blades (360 degrees) (Accompanied by matching wear marks on the tur bine housing I.D.) CAUSE: Blade contact against turbine housing due to shaft bearing worn or failed. RECOMMENDATION: DO NOT REUSE: Determine reason for bearing failure. The un balanced condition can be the result of excessive material removal. CONDITION: Cracked turbine… Read More »
A low power complaint or oil leakage found in the turbo charger housings can be the result of a number of factors. Locate the problem in the engine or support system and re pair it, and then bring the turbocharger up to temperature. The following list gives some possible causes for wetness. 1. Excessive idle.… Read More »
B e aware that faulty or improperly maintained air system hose connections can cause oil leaks. There have been cases in which a compressor outlet hose came loose and the resulting sudden air pressure drop allowed oil to leak past the turbocharger seal and enter the compressor. The compressor components can become oily and dirty… Read More »
To obtain good service life and efficient performance of the turbocharger, always observe good maintenance practices. Air and oil filtration – are the most important areas for maintaining the turbocharger. The majority of inoperative turbochargers are caused by: 1. Dirt in the oil 2. Sludged oil 3. Oil lag/lack of good oil flow 4. Foreign… Read More »
How a Turbocharger Works The heat energy and pressure in the engine exhaust gas is utilized to drive the turbine wheel. The speed of the rotating assembly and output of the compressor wheel is controlled by the design and sizing of the turbine housing. The housing acts as a nozzle to direct the exhaust gas… Read More »
There are five reasons why a turbocharger will quit performing. 1. Lack of lubrication. 2. Foreign material in the exhaust or inlet air supply. 3. Contaminated lube oil. 4. Defects in manufacture/workmanship. 5. Operating outside of design speed range. If any of the above situations occur prior to replacement, the main reason for deterioration must… Read More »