TM 55-2840-254-23
4-56 INSTALL SECOND TURBINE DISC ASSEMBLY (AVIM) (Continued)
4-56
NOTE
When checking runout, apply forward
pressure to compensate for bearing internal
clearance.
h. Zero indicator (16) and rotate second turbine
disc assembly (3) counterclockwise while
recording dimension.
i.
Maximum allowable runout shall be 0.003
inch. Record runout.
INSPECT
NOTE
If runouts measured in steps f. and i. are
not met, do steps j., k., and l. otherwise
proceed to step n.
j.
Loosen arm (11) at base (12) and move arm
(11) away from second turbine disc assembly
(3).
k. Loosen and retorque six bolts (5) to 155
inch-pounds.
l. Repeat preceding steps d through i.
m. If runouts are still not met, replace second
turbine disc assembly (Ref. Task 4-53 and
4-56).
n. Remove dial indicator (10), three slave bolts
(8), and support (7) from air diffuser (9).
o. Rotate engine 45 degrees to vertical position.
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Change 3
