TM 55-2840-254-23
4-36 INSTALL FOURTH STAGE POWER TURBINE ROTOR (AVIM) (Continued)
4-36
17. Measure clearance between blade tips (23) and
fourth stage power turbine nozzle (24) (tip
clearance) at 0, 45, 90, 135, 180, 225, 270 and
315 degree positions as follows:
a. Insert thickness gage between fourth stage
power turbine nozzle (24) and blade (23) tip.
Rotate fourth stage turbine rotor (4)
clockwise one revolution for each check.
b. Tip clearance shall be 0.020 inch minimum.
NOTE
If tip clearance is not within limits, re-
place power turbine assembly (Ref.
Tasks 3-6 and 3-7).
18. Coat threads of nut (25) with nickel ease (E37).
Install serviceable locking cup (26) and nut
(25) on shaft (1).
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