S 014-004
 (3)  Open the forward access door, 1103.
 E.  Sensor Removal (Fig. 401)
 S 494-005
 (1)  
Put the rigging pin E-1 into the control quadrant of the left forward elevator.

 (2)
Put the rigging pin A/S-1A into the aileron transfer mechanism.

 (3)  
Disconnect the electrical connector from the sensor.

 S 494-006
 S 034-007
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A 737-300/400/500MAINTENANCE MANUAL
 S 034-008
 (4)  
Disconnect the sensor control cables from the sensor pulley, spring, and pulley drum on the drum shaft installation.

 S 034-009

 (5)  
Remove the bolt, nut, and washer to remove the pulley from the sensor shaft.

 S 034-010

 (6)  
Remove the two clamp screws that attach the sensor to the bracket.

 S 024-011

 (7)  
Remove the sensor.

 TASK 31-24-32-404-012
 3. Control Wheel Position Sensor Installation
___________________________________________
 A. Consumable Materials
 (1)  
D00016 Grease - Aircraft, General Purpose, wide temperature range MIL-G-81322

 (2)  
C00528 Compound - Corrosion Preventive MIL-C-16173, Grade 2

 B. References
 (1)  31-24-32/501, Control Wheel Position Sensor
 C. Access
 (1)  
Location Zone
 202 Lower Nose Compartment

 (2)  
Access Panel
 1103 Forward Access Door

 D. Procedure
 S 424-013
 (1)
Put the sensor in the support bracket with the shaft down.

 S 624-014

 (2)  
Apply a thin layer of corrosion preventive compound on the inner and outer surfaces of the clamp screw threads.

 (3)  
Install the sensor clamp screws.

 (4)  
Tighten the screws to 30-35 pound-inches.

 (5)  
Install the pulley drum on the end of the shaft.

 (6)  
Attach the pulley drum with the bolt, nut and washer.

 S 434-015
 S 434-016
 S 434-017
 S 434-018
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 434-019
 (7)  Install the cables (Fig. 401).
 (a)  
Install cable C between the bottom spool on the sensor pulley drum and the bottom spool of the drum on the drum shaft.

 (b)  
With the cable terminals attached to the pulley and drum, attach the cable terminals with the cotter pin (Fig. 402).

 (c)  
Attach the pulley terminal end of cable A to the top spool of the sensor pulley.

 (d)  
Attach the pulley terminal end of cable B to the top spool at the pulley drum on the drum shaft (Fig. 401).

 (e)  
Attach the terminals with cotter pins.

 (f)  
Connect a spring between the loose end terminals of cables A and B.

 (g)  
Loosen the mounting bolts on the sensor support bracket.

 (h)  
Move the bracket in the slots on the right angle bracket to align the cables.

 (i)  
Lubricate the cables with grease for the full length of travel on the drum and quadrant.

 (j)  
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).

 (k)  
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). 1) Remove the laminations from the laminated shim to get the

 correct dimension.
 (8)  S 434-020Tighten the four bolts on the sensor support bracket.
　
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