4-67 INSTALL FIRST TURBINE DISC ASSEMBLY (AVIM) (Continued)
Place dial indicator and base (35) on support
Rotate engine to approximately 45 degrees.
In following step d, be sure pointer is on disc rim
and not on retaining plate
Adjust arm (36) at base (37) and clamp (38) to
position pointer (39) on outer surface (40)
adjacent to blade roots
When checking runout, apply forward pressure to
hub (41) to compensate for bearing internal
Zero indicator (42) and rotate first turbine disc
assembly (1) Record dimension.
allowable runout shall be 0.004 inch.
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