737-300/400/500
MAINTENANCE MANUAL

NO. 8
TRANSMISSION LOCATIONS

DEFINITION OF DIMENSION X

THIS DIMENSION IS BETWEEN THE FACE OF THE SCREW YOKE AND THE FORWARD END OF THE UPSTOP ON THE BALL NUT. THIS DIMENSION IS SEEN ONLY WHEN:
1.
 THE SCREW IS CORRECTLY ATTACHED TO THE SCREW YOKE

2.
 THE UPSTOPS ON THE BALL NUT AND SCREW YOKE ARE IN CONTACT

THIS DIMENSION IS BETWEEN THE FACE OF THE SCREW YOKE AND THE FACE OF THE BALL NUT, WITH THE BALL NUT AT ANY LOCATION ON THE SCREW
Transmission Locations and Definition of Dimension X
Figure 401

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A55148
A
737-300/400/500MAINTENANCE MANUAL
 (b)  
Move the SPEED BRAKE lever on the control stand to the UP detent.

 (c)  
Remove system A and B hydraulic power after all spoilers are in the extended position (AMM 29-15-00/201).

 (d)  
Install spoiler ground locks as follows:

 ~............................................................ | BALLSCREW | | | | TO BE REMOVED | TOOL NO. | SPOILER NO. | .............................................................. | 1 | C27001-23 or -24 | 0 and 1 | | 2 | F80017-23 or -33* | 2 and 3 | | 3 | F80017-23 or -33* | 3 | | | F80040-2 | 4 | | 6 | F80040-2 | 5 | | | F80017-23 or -33* | 6 | | 7 | F80017.23 or -33* | 6 and 7 | | 8 | C27001-23 or -24 | 8 and 9 | 2...................…...................…....................1
 * = or C27047-16
 S 974-010
 (10)
 At the ballscrew to be removed, do these steps (which will help with the installation task):

 (a)  
Measure and write down the "X" dimension.

 1)  Make a note of the position of the upstop on the screw yoke in relation to the transmission output shaft.

 (b)  
If the ballscrew removal is at the outboard transmissions, make a note of the position of the lubrication reservoir on the ball nut.

 NOTE: The lubrication reservoir can be inboard or outboard.
____ The same position must be kept after installation.
 E.  Remove the ballscrew of an outboard flap transmission (Fig. 402).
 S 034-011
 (1)  
Disconnect the gimbal from the fitting on the midflap (Fig. 402, Sheet 2).

 (a)  
On each side of the fitting on the midflap, remove the failsafe bolts.

 (b)  
On each side of the gimbal, remove the three fasteners, and the flanged bushings with the adjacent shims.

 (c)  
Make a record of the shim thickness.

 NOTE: Always keep shims with the flanged bushing that they
____ were initially installed with. This is necessary to keep initial lateral position adjustment of the ballscrew.
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A

737-300/400/500
MAINTENANCE MANUAL

INBD
NO. 1 TRANSMISSION
YOKE
FWD
SCREW
____BALLSCREW OF THE NO. 1
NOTE: TRANSMISSION IS SHOWN. BALLSCREWS OF THE NO. 2, NO. 7, AND NO. 8 TRANSMISSIONS ARE ALMOST THE SAME.
TORQUE TUBE COUPLING
UNIVERSAL JOINT BOLT AND CROSS PIN
TRANSMISSION
OUTPUT SHAFT
BOLTS (2 LOCATIONS)
SCREW
FLANGED BUSHING  BOLT
FAIL SAFE BOLT
GIMBAL
A
FLAP FITTING
PHILLIPS HEAD SCREW
A
BALL NUT
OIL
RESERVOIR
A55230
Ballscrew of the Outboard Flap Transmission
Figure 402 (Sheet 1)

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