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 -

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 MORE THAN ONE

HALF OF AGB MAGNETIC PLUG IS

COVERED WITH METAL CHIPS. -

CONTINUED

FROM STEP 2

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 (1) by hand and high

pressure compressor blades by

turning spline coupling (2).

Listen and feel for rubbing or

binding.

Do compressors turn smoothly with

no unusual noises?

YES

Go to step 8.

Check rotation of RGB assembly

(3) by putting splined shaft

(4) in RGB assembly and turning

shaft (4) clockwise. Shaft

should turn smoothly and no

unusual noises should be heard.

Does shaft turn smoothly with no

unusual noises?

CONTINUED ON NEXT PAGE

3-74

Change 5