75-32-03
 ALL  ú ú C01 Page 403 ú Jul 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 034-025-C00
 CAUTION: DO A CHECK THAT THE VALVE DOORS ARE ALMOST CLOSED.
_______
 (4)  Disengage and remove the flexible shafts from each side of the master ballscrew actuator.
 NOTE: To do this, compress the spring hexagonal end of the flexible
____ shaft at the end away from the actuator (upper shaft) and at the actuator end (lower shaft). You must also disengage the 8-point fitting at the opposite end.
 S 034-026-C00
 (5)  Disconnect the feedback rod of the variable bleed valve (VBV) from the feedback lever for door position as follows:
 (a)  
Remove and discard the cotter pin.

 (b)  
Remove the slotted nut.

 (c)  
Remove the washer.

 (d)  
Remove the bolt and disengage the clevis from the feedback lever.

 S 034-027-C00
 (6)  
Remove the two screws that attach the bleed valve and master ballscrew actuator to the 9 o'clock strut.

 S 034-028-C00

 (7)  
Loosen the four primary captive bolts that attach the bleed valve and master ballscrew actuator to the fan frame.

 S 034-029-C00
 CAUTION: DO NOT CAUSE DAMAGE TO THE BOOT ON THE STOP MECHANISM WHILE YOU
_______ COMPRESS THE MAIN FLEXIBLE SHAFT.
 (8)  Use a hexagonal (Allen) wrench, 5/64 inch across the flats, to disengage the hexagonal end of the main flexible shaft.
 NOTE: To do this, push it into the stop mechanism of the bleed
____
 valve and the fuel gear motor.

 S 024-030-C00
 (9)  Remove the bleed valve and master ballscrew actuator from the engine.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-32-03
 ALL  ú ú C01 Page 404 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TASK 75-32-03-404-031-C00
 3. Install the Bleed Valve and Master Ballscrew Actuator
_____________________________________________________
 A. Equipment
 (1)  
856A2501, Wrench - Dual Purpose Ratchet for VBV Manual Actuation, CFM International, P.O. Box 15514, Cincinnati, OH 45215

 (2)  
856A3368, Yoke - VBV Doors Setting, CFM International

 (3)  
856A3408, Gage - Setting Yoke Master for the VBV Door, CFM International

 B. Consumable Materials
 (1)  Grease - Graphite (CP2101) (AMM 70-10-01/201)
 C. References
 (1)  
AMM 70-10-01/201, Consumable Materials

 (2)  
AMM 71-11-02/201, Fan Cowl Panels

 (3)  
AMM 72-33-03/401, Fan Duct Panels

 (4)  
AMM 75-32-00/201, Variable Bleed Valve System

 (5)  
AMM 75-32-02/501, Bleed Valve Stop Mechanism

 (6)  
AMM 78-31-00/201, Thrust Reverser System

 D. Access
 (1)  
Location Zones 506 Engine No. 1 - 9 o'clock position on the fan frame 606 Engine No. 2 - 9 o'clock position on the fan frame

 (2)  
Access Panels
 5783L Engine No. 1 - Thrust Reverser Half
 5838R Engine No. 2 - Thrust Reverser Half

 E. Procedure (Fig.401)
 S 724-032-C00
 (1)  Do a check that the translating nut in the bleed valve and master ballscrew actuator moves freely.
 NOTE: To do this, operate the master ballscrew actuator with the
____ VBV control drive (flexible shaft end). Use the dual purpose ratchet wrench.
 S 824-033-C00
 (2)  
Set the bleed valve near the closed position.

 S 214-034-C00

 (3)  
Do a check that the stop mechanism of the bleed valve is in the closed stop position.

 NOTE: To do this, turn the main flexible shaft in the direction
____ shown by the arrow on the stop mechanism housing.
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