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

(10) ES-10. AGB GEAR TRAIN TURNS

a. ACCESSORY GEARBOX (AGB) AND

HIGH PRESSURE COMPRESSOR -

UNEVENLY (BINDS) WHEN TURNED BY

CONTINUED

HAND, RUBBING OR BINDING IS

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

CONTINUED FROM STFP 11

Check rotation of power turbine

in rear engine subassembly (1)

by turning shouldered 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. If

damaged, replace number

12 bearing and splined

B. Replace number 10 bearing

C. Clean AGB (page 7-46).

D. Replace 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.

A. Replace engine assembly

B. Verify problem is solved.

END OF TASK

Change 6

3-95