TM 55-2840-254-23
4-40 INSTALL NO. 4 AND 5 BEARING PACKAGE SEALS (AVIM) (Continued)
4-40
49. Check axial clearance between fourth stage
power turbine rotor (59) and fourth stage
power turbine nozzle (86) at blade tips (96).
Use 0.115 inch and 0.290 inch bent wire gage
(Appendix E) (97) inserted between fourth
stage power turbine rotor blades (74). Axial
clearance shall not be less than 0.115 inch or
more than 0.290 inch.
NOTE
If axial clearance is not within limits, do
steps 37. through 49. Ring spacer may
be installed or removed as necessary.
Recheck clearance. If clearance still
is not within limits, replace power
turbine assembly.
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