AGB GEAR TRAIN TURNS UNEVENLY (BINDS) WHEN TURNED BY HAND, LOW PRESSURE COMPRESSOR RUBS OR BINDS WHEN TURNED BY HAND-continued

TM 9-2835-255-34

3-2. TROUBLEBHOOTING - CONTINUED

(7) ES-7. AGB GEAR TRAIN TURNS

a. ACCESSORY GEARBOX (AGB) AND

UNEVENLY (BINDS) WHEN TURNED BY

HIGH PRESSURE COMPRESSOR -

HAND, LOW PRESSURE COMPRESSOR

CONTINUED

RUBS OR BINDS WHEN TURNED BY

HAND AND MORE THAN ONE HALF OF

AGB MAGNETIC PLUG IS COVERED

WITH METAL CHIPS. - CONTINUED

Supplies:

Tools:

Wiping rag (Item 14, Appendix B)

General mechanic's tool kit:

automotive (SC 5180-90-N26)

References:

AGB gear train handle (Item 42,

TM 20-1

Appendix D)

TM 34-1

A. Remove AGB module

(page 7-6).

B. Remove forward engine module

(page 5-13).

CAUTION

Extreme care should be taken

when handling low pressure

turbine rotor shaft (1).

Banging, jarring or rough

handling will cause damage to

No. 5 bearing carbon seal.

C. L i f t e n d ( 2 ) o f s h a f t ( 1 )

slightly to center shaft

(l), then push shaft (1) in

to establish clearance

between power turbine disc

(3) and nozzle (4) and to

load No. 5 b e a r i n g ( 5 ) .

D. Turn shaft (1), listen and

feel for rubbing or binding.

Does shaft turn smoothly with no

unusual noises?

YES

Go to step 3.

CONTINUED ON NEXT PAGE

3-51

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