TM-9-2990-206-34&P Parts Manual, Tools and Maintenance for Turbocharger Model T18C01 Download
Page 19 of 85
Table 2-1. Troubleshooting - Continued. PROBLEM PROBABLE CAUSE CORRECTIVE ACTION 7. Compressor wheel and turbine wheels appear very loose when moved in and out or up and down by hand, evidenced by excessive noise. Worn sleeve bearings, thrust ring, or thrust bearing. Disassemble and repair turbosupercharger. Refer to page 3-1. 8. Compressor wheel and turbine wheels turn freely, without binding or rubbing, when spun by hand. a. Check Radial Clearance. If necessary remove mounting leg before removing drain tube. (1) (2) (3 ) (4) (5) (6) (7) Using 9/16 inch double offset box wrench, remove two bolts and lockwashers (A). Remove oil drain tube (B). Remove and discard gasket (C). Position a dial indicator (D) on mounting leg (or any flat sur- face) so that the plunger ex- tends through the oil drain hole and contacts the turbine wheel shaft. Apply equal pressure to the com- presser wheel and turbine wheel to move the turbine wheel shaft away from the indicator plunger. Set the dial indicator to zero. Apply equal pressure to the com- presser wheel and turbine wheels to move the turbine wheel shaft as far as possible toward the indicator plunger. Note radial clearance on indicator dial. NOTE Verify that the reading is the maximum obtainable by rotating the wheels slightly in both directions while applying pressure. TA097805 2-3 TM 9-2990-206-34&P