TM-9-2990-206-34&P Parts Manual, Tools and Maintenance for Turbocharger Model T18C01 Download
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CHAPTER 2 TM 9-2990-206-34&P MAINTENANCE INSTRUCTIONS Section 1. TROUBLESHOOTING 2-1. GENERAL. a. Purpose. These troubleshooting instructions are to be used after the turbosupercharger has been removed from the engine. (1) These instructions will be used to make sure the reasons given on the repair tag are correct, and to find out if there are other problems with the turbosupercharger. (2) If no repair tag is attached, the instructions can be used to find out what is wrong so it can be repaired. b. Inspection. Inspect the turbo- supercharger for the problems listed below, and then go to the Trouble- shooting Table to find out the cause and what corrective action to take. 2-2. INSPECTION. (5) A lot of oil in the turbine housing exhaust inlets, with heavy oily soot deposits on the turbine wheel. (6) Heavy oily soot deposits on the turbine wheel, with no oil in the turbine housing exhaust inlets. (7) Damaged or eroded (worn) compressor wheel blades. NOTE If the compressor wheel blades are worn, look for dust or sand deposits in the compressor hous- ing inlet and outlet openings. (8) Peened or feathered edges on compressor wheel or turbine wheel blade tips. (9) Compressor wheel or turbine wheel does not turn freely when spun by hand. (10) Compressor wheel or turbine wheel appears very loose when moved in a. Inspect the Turbosupercharger for: (1] Broken, damaged, or missing studs. and out or up and down by hand, ac- (2) Cracked or broken mounting legs or oil drain tube. NOTE Mark any damage found for repair and continue to inspect for the following items (3) through (10). If no additional problems are found, the turbosupercharger should then be cleaned, damaged items replaced, and the unit returned to the supply system. (3) Cracked or damaged compressor housing, turbine housing, or center housing. (4) A lot of oil in the compressor housing air outlet. NOTE A trace of oil in this area is normal. companied by excessive noise. NOTE If this apparent loose condition is found, press the turbine wheel and compressor wheels in opposite directions, up and down as far as possible, with the fingers. Rock them back and forth and listen for a rubbing sound. Also press the compressor wheel and turbine wheel in as far as possible, rock back and forth, and listen for a rubbing sound. b. Corrective Action. Refer to table 2-1 (page 2-2). 2-1