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

( 9 ) ES-9.

AGB GEAR TRAIN TURNS

HIGH PRESSURE COMPRESSOR -

U N E V E N L Y (BINDS) WHEN TURNED BY

CONTINUED

H A N D , RUBBING OR BINDING IS FELT

W H E N TUBEAXIAL FAN BLADES OR

L E F T COOLING FAN BLADES ARE

TURNED BY HAND AND MORE THAN ONE

H A L F OF AGB MAGNETIC PLUG IS

C O V E R E D WITH METAL CHIPS. -

CONTINUED

Check rotation of RGB assembly

(1)

by putting splined shaft

(2) in RGB assembly and turning

shaft (2) clockwise. Shaft

should turn smoothly. No

unusual noises should be heard.

Does shaft turn

smoothly

with

unusual noises?

YES

Go to step 7.

WARNING

Compressor blades are sharp and

can cut you. Be careful not to

pinch fingers between blades

and vanes when turning

compressor.

Turn low pressure compressor

blades (3) by hand. Listen and

feel for rubbing or binding.

Does low pressure compressor turn

smoothly with no unusual noises?

CONTINUED ON NEXT PAGE

Change 5

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