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TM 9- 2990- 205- 34&P
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ASSEMBLY AND OPERATIONAL TESTING - CONTINUED
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0012 00
f.
While supporting turbine wheel and shaft assembly in the bearing housing, place turbine wheel hub in box
wrench. Hold in position.
g. Install compressor wheel (8) on shaft.
h. Install new compressor wheel lock nut (9). Torque lock nut to 50 to 55 lb--ft (67.8 to 74.6 NSm).
i.
Remove unit from vise.
9
8
7
03i495m
7. Check Compressor Wheel Back Clearance.
a. With compressor wheel lock nut (1) tightened to 50 to 55 lb--ft (67.8 to 74.6 NSm), check the clearance
between compressor wheel (2) and bearing housing (3) using feeler gages (4).
b. Clearance must be from 0.019 to 0.022 inch. Add or remove compressor wheel shims as required to obtain
proper clearance.
NOTE
Compressor wheel shims are available in 0.003, 0.005, and 0.010 inch thicknesses.
0012 00- 8
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