(4)  
Disconnect the electrical connector from the sensor.

 S 494-006
 S 034-008
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737-300/400/500MAINTENANCE MANUAL
 S 034-009
 (5)  
Remove the bolt, nut, and washer which attach the pulley to the sensor shaft.

 S 034-010

 (6)  
Remove the pulley.

 S 034-011

 (7)  
Remove the two clamp screws that attach the sensor to the bracket.

 S 024-012

 (8)  
Remove the sensor.

 TASK 31-24-42-404-013
 3.  Rudder Pedal Position Sensor - Installation___________________________________________
 A. Consumable Materials
 (1)  
C00528 Compound - Corrosion Preventive, MIL-C-16173 grade 2

 (2)  
D00016 Grease - Aircraft, general purpose, wide temperature range MIL-G-81322

 B. Access
 (1)  
Location Zone
 202 Lower Nose Compartment

 (2)  
Access Panel
 1103 Forward Access Panel

 C. Procedure
 S 424-014
 (1)  
Install the sensor in the bracket with the shaft down.

 S 624-015

 (2)  
Apply a thin layer of corrosion preventive compound on the internal and external surfaces of the threads on the clamp screws.

 S 434-016

 (3)  
Install sensor clamp screws and tighten them to 30 to 35 pound-inches.

 (4)
Install the pulley drum on the bottom of the sensor shaft.

 S 434-018

 (5)  
Install the bolt and nut with a washer below the bolt head and a washer below the nut.

 S 434-019

 (6)  
Install the cables.

 (a)  
Install cable C between the top part of the jackshaft quadrant and the top spool on the pulley drum.

 (b)  
Use the cotter pins to attach the ends of the cable terminals (Fig. 402).

 S 434-017
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737-300/400/500MAINTENANCE MANUAL
 (c)  Attach the ball terminal end of cable A to the lower part of
 the quadrant.
 (d)  Attach the ball terminal end of cable B to the lower spool on
 the pulley drum.
 (e)  Install the spring between the loose ends of cables A and B.
 (f)  Loosen the bolts on the sensor support brackets and align the
 cables if it is necessary.
 NOTE:____ Lift or lower the bracket in the slots to align the
 cables.
 (g)  Lubricate the cables with grease for the full length of travel
 on the drum and the quadrant.

 S 824-020
 (7)  
AIRPLANES WITHOUT SERVICE LETTER 737-SL-27-089-A; Make sure the dimension across the spring between the cable terminals is 2.09 |0.02 inches (Fig. 401).

 S 824-031

 (8)  
AIRPLANES WITH SERVICE LETTER 737-SL-27-089-A; Make sure the dimension across the spring between the cable terminals is 2.03 |0.02 inches (Fig. 401).

 S 824-021

 (9)  
Remove the laminations from the laminated shim to get the correct dimension.

 S 434-022

 (10)
 Tighten the bolts on the sensor support bracket.

 S 034-023

 (11)
 Loosen the two sensor clamp screws.

 S 824-024

 (12)
 Hold the cable drum and turn the sensor until the mark on the shaft aligns with the mark on the sensor.

 NOTE: No special position of the aligned marks is necessary.
____
 S 434-025
 (13)
 Tighten the clamp screws to 30-35 pound-inches.
　
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