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

POWER TURBINE AND REDUCTION (1)

ES-40 RUBBING OR BINDING IS

GEARBOX (RGB) - CONTINUED

FELT WHEN TUBEAXIAL FAN BLADES

OR LEFT COOLING FAN BLADES ARE

TURNED BY HAND. NO OTHER

ROTATION OR METAL CHIPS NOTED. -

CONTINUED

CONTINUED FROM STEP 1

A. Remove RGB assembly

B . Check rotation of RGB

assembly (1) by putting

splined shaft (2) in RGB

assembly and turning shaft

(2) clockwise. Shaft should

turn smoothly and no unusual

noises should be heard.

Does shaft turn smoothly with no

unusual noises?

A . Salvage Gas Turbine Power

B . Verify problem is solved.

Check rotation of power turbine

in rear engine subassemby (3)

by turning shouldered 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

3-310

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