INSPECT THRUST SPACER

TM 9-2990-206-34&P

INSPECTION-Continued.

TOOLS:

0.3125 to 0.5000 inch telescope gage

0.00 to 1.00 inch micrometer

0.0015 to 0.025 inch blade thickness gage (feeler)

Inspect thrust spacer (A) for cracks, scoring, galling

chipped edges or wear on end surfaces. End surfaces

must be parallel within 0.0001 inch TIR (0.0025 mm TIR).

2. Measure bore diameter (C) using telescope gage and mi-

crometer. Replace thrust spacer if bore diameter ex-

ceeds 0.3758 inch (9.645 mm). Inspect grooves (D) for

wear. Measure width of grooves (D)using thickness gage.

Replace thrust spacer if groove width exceeds 0.0695 Inch

(1.765 mm).

3. Replace thrust spacer if damaged, has groove wear,

or does not meet wear limit requirements.

INSPECT THRUST RING

TOOLS:

0.00 to 1.00 inch micrometer

0.3125 to 0.5000 inch telescope gage

Inspect thrust ring (E) for scratches, scoring, and galling

on inside surface (F) and bottom surface (G). Check to be

certain oil passages (H) are clear. Surface (F) must be

free of surface defects and have a smooth surface finish.

End surfaces (J) and (K) must be parallel within 0.0003

inch (0.0076 mm). Surface (F) must be parallel to sur-

face (L) within 0.0020 inch TIR (0.0508 mm TIR).

Measure thickness (M) using micrometer. Replace thrust ring

if thickness is less than 0.2990 inch (7.595 inn). Measure

bore diameter (N) using telescope gage and micrometer. Re-

place thrust ring if bore diameter exceeds 0.3758 inch

(9.545 mm).

Measure thickness (P). Replace thrust ring if thickness is

less than 0.0850 inch (2. 159 mm). Measure diameter (Q).

Replace thrust ring if diameter is less than 1.1200 inch

(28.45 mm).

Replace thrust ring if damaged, or does not meet wear limit

requirements.

TAO97819

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