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

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

CONTINUED FROM STEP 6

A . Replace number 10 bearing

B . Replace forward engine

C . Clean AGB (page 7-46).

D . Replace engine oil pump

(TM 20-1).

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.

FROM STEP 3

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 splined coupling (2) in

both directions. Listen and feel

for rubbing or binding.

Do compressors turn smoothly with

no unusual noises?

CONTINUED ON NEXT PAGE

3-76

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