AGB GEAR TRAIN TURNS UNEVENLY (BINDS) WHEN TURNED BY HAND, RUBBING OR BINDING IS FELT WHEN TUBEAXIAL FAN BLADES OR LEFT COOLING FAN BLADES ARE TURNED BY HAND-continued

TM 9-2835-255-34

3-2. TROUBLESHOOTING - CONTINUED

a. ACCESSORY GEARBOX (AGB) AND (10) ES-10. AGB GEAR TRAIN TURNS

UNEVENLY (BINDS) WHEN TURNED BY

HIGH PRESSURE COMPRESSOR -

HAND, RUBBING OR BINDING IS

CONTINUED

FELT WHEN TUBEAXIAL FAN

BLADES OR LEFT COOLING FAN

BLADES ARE TURNED BY HAND AND

THERE ARE METAL CHIPS IN THE

OIL PUMP TO OIL COOLER FLUID

FILTER. - CONTINUED

Check rotation of RGB assembly

(1) by putting splined shaft

(2) in RGB assembly and turning

shaft (2) clockwise. Shaft

should turn smoothly and no

unusual noises should be heard.

Does shaft turn smoothly with no

unusual noises?.

A. Inspect splined coupling (3)

for evidence of damage. lf

damaged, replace number

12 bearing and splined

B. Salvage Gas Turbine Power

C. Clean AGB (page 7-46).

D. Replaced engine oil pump

(TM 20-1).

E. Replace engine oil cooler

(TM 20-1).

F. Replace engine AC

generator (TM 20-1).

G. Clean cooler and generator

lines (TM 20-1).

H. Verify problem is solved.

CONTINUED ON NEXT PAGE

Change 6

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