TM 9-2320-363-34-2
TURBOCHARGER REPAIR (CONT)
28.
29.
30.
31.
32.
33.
34.
35.
36.
MAKE RADIAL PLAY MEASUREMENT WITH DIAL INDICATOR (28) CLAMPED TO TURBINE
HOUSING (26). PLACE CURVED END OF INDICATOR ADAPTER (30) IN CONTACT WITH WHEEL
SHAFT THRU OIL OUTLET PORT AND INTERNAL OPENING IN CENTER HOUSING (2).
PLACE DIAL INDICATOR PLUNGER (29) IN CONTACT WITH EXPOSED PORTION OF INDICATOR
ADAPTER (30) AT POINT EQUIDISTANT FROM ADAPTER PIVOT (31) AND POINT OF CONTACT
WITH WHEEL SHAFT (32) ADAPTER TO CENTER HOUSING (2). SPRING ACTION OF DIAL
INDICATOR PLUNGER (29) WILL KEEP ADAPTER IN CONTACT WITH SHAFT (32).
APPLY EVEN PRESSURE SIMULTANEOUSLY TO COMPRESSOR AND TURBINE WHEELS TO
MOVE SHAFT (32) AS FAR AS IT WILL GO AWAY FROM DIAL INDICATOR PLUNGER.
SET DIAL INDICATOR (28) AT ZERO.
APPLY EVEN PRESSURE SIMULTANEOUSLY TO COMPRESSOR AND TURBINE WHEELS TO
MOVE SHAFT (32) AS FAR AS IT WILL GO TOWARD DIAL INDICATOR PLUNGER (29). NOTE
MAXIMUM SHAFT (32) MOVEMENT SHOWN ON DIAL INDICATOR.
ROTATE WHEELS SLIGHTLY IN ONE DIRECTION, THEN IN OTHER, WHILE APPLYING PRESSURE
TO COMPRESSOR AND TURBINE WHEELS, TO MAKE SURE DIAL INDICATOR (28) READING IS
MAXIMUM POSSIBLE.
APPLY EVEN PRESSURE SIMULTANEOUSLY TO COMPRESSOR AND TURBINE WHEELS TO
MOVE SHAFT (32) AS FAR AS IT WILL GO AWAY FROM DIAL INDICATOR PLUNGER (29). MAKE
SURE DIAL INDICATOR (28) POINTER RETURNS TO ZERO.
REPEAT STEPS 30 THRU 34 SEVERAL TIMES TO MAKE SURE MAXIMUM BEARING RADIAL
CLEARANCE, AS INDICATED BY MAXIMUM SHAFT (32) MOVEMENT, HAS BEEN MEASURED.
BEARING RADIAL CLEARANCE MUST BE 0.0048-0.0068 lN. (0.122-0.173 mm). DISASSEMBLE AND
REPAIR TURBOCHARGER IF BEARING RADIAL CLEARANCE DOES NOT MEET SPECIFICATION.
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