SPEED BRAKE LEVER POSITION SENSOR
2
CAM FLIGHTLEVER ARM
FORWARD
DETENTADJUSTMENT SBB
DRUM
BOLTS ADJUSTABLESBA(2 LOCATIONS) CONTROL ROD 2
A-A
CONTROL CABIN FLOOR
SEE BMOUNTING BOLT (EXAMPLE 5 LOCATIONS)
LEVER BRAKE LEVER ARM
A
MOUNTING
BRACKET

SPEED BRAKE
FORWARD DRUM

QUADRANT
RETAINING BOLT

RIG SPEED BRAKE PIN S/B-1 CONTROL CABLES SPEED BRAKE LEVER ACTUATOR
RIG PIN 
S/B-1 HOLE 
SEE  A 
ROD MOUNTING 
BRACKET  2 
CONTROL ROD 
MOUNTING BOLT  2 
SPEED BRAKE 
CONTROL LEVER 
SPEED BRAKE 
TAKEOFF WARNING 
SWITCH (S651) 
IDLER LINK 
UPPER 
CHECKNUT  CONTROL 
ROD 
LOWER 
CONTROL 
ROD 

A SPEED BRAKE ARMING
SWITCH (S276) FWD INBD
A
1THE ROLLER ALIGNS WITH THE INDEX MARK WHEN THE SPEED BRAKE CONTROL LEVER IS IN THE DOWN POSITION
2 AIRPLANES WITH THE SPEED BRAKE LEVER POSITION SENSOR
Speed Brake Forward Drum and Lever Brake Installation Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

BEARING
RETAINER

LOWER
CONTROL ROD

BEARING RETAINER BOLT (6 LOCATIONS)
DRIVE ARM
LEVER BRAKE INPUT ARM
SPEED BRAKE ACTUATOR ROD END
SHOE
PIVOT PIN BRAKE LEVER ACTUATOR RETAINING BOLT
SPEED BRAKE LEVER ACTUATOR
SEE C  SHAFT FWDSUPPORT
FRICTION BRACKET
QUADRANT
LEVER BRAKE MECHANISM
B

SETSCREW
BRAKE SHOE
DRIVE ARM SECONDARY BACKLASH
SETSCREW
PRIMARY BACKLASH
TOTAL CLEARANCE

SETSCREW
0.020 TO 0.023 INCH
SPRING

SETSCREW
C
Speed Brake Forward Drum and Lever Brake Installation Figure 401 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SPEED BRAKE FORWARD DRUM (RIG PIN S/B-1)
TO MAKE SURE YOU GET THE CORRECT CABLE TENSION, PERMIT THE AIRFRAME TEMPERATURE TO STABILIZE (|5 DEGREES) FOR A MINIMUM OF ONE HOUR.
YOU MUST ADJUST THE TENSION IN THE CABLES WHEN THE TENSION IS MORE THAN |15 POUNDS FROM THE VALUE IN TABLE I.

Speed Brake Control System Cable Locations and Cable Tension Figure 402

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 TASK 27-62-21-404-012
 3.  Speed Brake Forward Drum and Lever Brake Installation_____________________________________________________
 A.  Special Tools and Equipment
 (1)  Rig Pin (S/B-1) - 0.311 +0.000/-0.002 inch diamter, 6.70 +/-0.25 inches long
 NOTE: The rig pin is a part of the kit F70207-69, -78, or -83.
____
 (2)  Rig Pin (S/B-2) - 0.311 +0.000/-0.002 inch diamter, 2.35 +/-0.06 inches long
 NOTE: The rig pin is a part of the kit F70207-69, -78, or -83.
____
 B.  Consumable Materials
 (1)  
C00259 Primer BMS 10-11, Type I

 (2)  
D00633 Grease - BMS 3-33 (Recommended)

 (3)  
D00013 Grease - MIL-G-23827 (Alternate)

 C.  
References

 (1)  
27-62-00/501, Speed Brake Control System

 (2)  
　
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