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 (4)  S 725-026Apply a torque of 120 |10 pound-inches counterclockwise to the no-back output shaft on the spoiler ratio changer. (a) Make sure the speed brake input quadrant moves a maximum of 2 degrees (0.125 inch at the radius of the cable groove on the input quadrant).
 (5)  S 905-030If the no-back output shaft on the spoiler ratio changer is not in the specified limit, replace the ratio changer (AMM 27-61-31/401).
 (6)  S 435-027Tighten the cables SBA and SBB using the turnbuckles.
 (7)  S 825-028Make sure the cable tension is in the limits shown in (Fig. 502).
 (8)  S 415-029Install the spoiler mixer (AMM 27-61-21/401).

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A
737-300/400/500
MAINTENANCE MANUAL

PUSHROD
MOUNTING STUDS
SPOILER (4 LOCATIONS)
MIXER
RIG PIN A/S-14
LOWER CRANK
RIG PIN A/S-3 GREASE
AILERON
FITTING
SPRING
MOUNTINGACCESS CARTRIDGE STUDS (4 LOCATIONS)COVER
RATIO CHANGER
SEE A SEE B
RIG
PIN A/S-4

NO-BACK
OUTPUT
SHAFT

TWO-BOLT COUPLING (3 LOCATIONS)
AILERON INPUT SHAFT (COUPLING IS ON THE SPOILER MIXER) FWD
A
Spoiler Mixer No-Back
Figure 501 (Sheet 1)

G68790
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A

737-300/400/500
MAINTENANCE MANUAL

CABLE SBA 
CABLE SBB 
NO-BACK 
INPUT ROD 
WHEEL WELL 
FORWARD BULKHEAD 
SPOILER 
OUTPUT 
QUADRANT  SPEED BRAKE  RIG 
INPUT QUADRANT  PIN S/B-2 
RATIO CHANGER 
FWD 
B 

Spoiler Mixer No-Back
Figure 501 (Sheet 2)

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G68793
A

737-300/400/500
MAINTENANCE MANUAL

GROUND SPOILER

TABLE 
TEMP `F  CABLE TENSION -
1  POUNDS +10/-0 
2 
110 118 
90 109 
70 100
 50  92
 30  84
 10  75
-10  67
-30  59
-40  53 

WHEN THE TENSION IS |15 POUNDS FROM THE VALUE IN THE TABLE.
Speed Brake Control System Turnbuckle Locations and Cable Tension Figure 502
G68798
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 SPOILER RATIO CHANGER - REMOVAL/INSTALLATION
____________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the spoiler ratio changer. The spoiler ratio changer is installed on the forward bulkhead of the main wheel well.
 TASK 27-61-31-004-001
 2.  Spoiler Ratio Changer Removal
_____________________________
 A.  References
 (1)  
27-61-00/201, Flight Spoiler Control System

 (2)  
27-61-21/401, Spoiler Mixer

 B.  
Access

 (1)  
Location Zone
 202 Lower Nose Compartment
　
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