(b)
Make sure the lever latch is in the DOWN detent on the control stand.
(c)
In the lower nose compartment, make sure you can easily install the rig pin S/B-1 through the forward drum quadrant (Fig. 502).
(d)
If you cannot easily install the rig pin, adjust the lower control rod: 1) Disconnect the top end of the lower control rod from the
idler link (Fig. 502). 2) Install the rig pin S/B-1 in the forward drum quadrant. 3) Loosen the checknut on the lower control rod. 4) Adjust the lower control rod until you can easily install
the rod end bolt. 5) Install the bolt with a washer below the head to attach the lower control rod to the idler link.
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A
737-300/400/500
MAINTENANCE MANUAL
GROUND SPOILER
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 SPEED BRAKE CABLES WHEN THE TENSION IS MORE THAN |15 POUNDS FROM THE VALUES IN THE TABLE I.
Speed Brake Control System - Rig Pin Locations and Cable Tensions Figure 501
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737-300/400/500MAINTENANCE MANUAL
SPEED BRAKE DOWN
SEE B
CONTROL LEVER
IDLER LINK ARMED
SEE A FLOOR CABIN CONTROL CHECKNUT ROD CONTROL LOWER ROD CONTROL UPPER
SPRING SCREWS
A DETENT FLIGHT
SPEED BRAKE
UP
FORWARD DRUM SPEED BRAKE LEVER ACTUATOR
A
FWD INBD B
RIG PIN S/B-1 A
CAM ROLLER SPRING DETENT ROLLER MARK INDEX 1 RIG PIN S/B-1 HOLE
LEVER ARM
ARMED DETENT
SPEED BRAKE
LEVER POSITION
SENSOR SPEED BRAKE
CAM ARMING SWITCH
2
ROD MOUNTING BRACKET
2
LEVER ARM ADJUSTMENT BOLTS
CONTROL ROD (2 LOCATIONS)
MOUNTING BOLT 2 FORWARD
FLIGHT DRUM
DETENT QUADRANT
CABLE SBB ADJUSTABLECABLE SBA CONTROL ROD 2
A-A
1
THE ROLLER ALIGNS WITH THE INDEX MARK WHEN THE SPEED BRAKE CONTROL LEVER IS IN THE DOWN POSITION
2
AIRPLANES WITH SPEED BRAKE LEVER POSITION SENSOR
Speed Brake Forward Drum and Linkage Adjustment Figure 502
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(e)
(f)
(g)
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737-300/400/500MAINTENANCE MANUAL
6) Install the washer and nut on the bolt.
7) Tighten the checknut on the rod end.
8) Make sure you can see the rod end through the inspection
hole on the control rod.Make sure the pointer on the aft face of the speed brake lever aligns with the detents: 1) Move the speed brake lever to the DOWN position. 2) Make sure the pointer aligns with the center of the DOWN
marker on the control stand. 3) Move the speed brake lever to the ARMED position. 4) Make sure the pointer aligns with the center of the ARMED
marker on the control stand. 5) Move the speed brake lever to the FLIGHT DETENT position. 6) Make sure the pointer aligns with the center of the FLIGHT
DETENT marker on the control stand. 7) Move the speed brake lever to the UP position. 8) Make sure the pointer aligns with the center of the UP
marker on the control stand. 9) Move the speed brake lever to the DOWN position.Make sure the travel of the speed brake lever is 48-1/2 |1/2 degrees: 1) Move the speed brake lever from the DOWN position to the UP
position. 2) Make sure the speed brake lever moves 48-1/2 |1/2 degrees. 3) Move the speed brake lever to the DOWN position.If the speed brake lever does not align with the markers or the travel is not in the limits, adjust the speed brake lever: 1) Make sure the lever latch is in the detent on the control
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