(c)  
Disconnect the forward ends of the input rods from the horizontal stabilizer center section.

Stabilizer Trim Lock Installation
Figure 402

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A

737-300/400/500
MAINTENANCE MANUAL

SEE A
NEUTRAL SHIFT MECHANISM
SEE B
FEEL AND CENTERING UNIT
FWD
INSTALL RIG PIN
A
Elevator Neutral Shift Mechanism Installation Figure 403 (Sheet 1)
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A 737-300/400/500MAINTENANCE MANUAL
MACH TRIM 
ACTUATOR 
ELEVATOR NEUTRAL 
SHAFT MECHANISM 

FWD
NEUTRAL SHIFT MECHANISM B
Elevator Neutral Shift Mechanism Installation
Figure 403 (Sheet 2)

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A
737-300/400/500MAINTENANCE MANUAL
 (d)  
Remove the two input rods from the airplane.

 (e)  
Remove the three bolts, nuts, and washers that attach each end of the neutral shift crank to the support bracket.

 (f)  
Remove the neutral shift crank and spacers from the airplane.

 (g)  
Disconnect the rods of the stabilizer position sensor.

 TASK 27-31-91-404-010
 3.  Elevator Neutral Shift Mechanism Installation_____________________________________________
 A. Special Tools and Equipment
 (1)  Rig Pin E-5 - 0.309/0.311-inch diameter, 6.7 |0.25 inches long (MS20392-4)
 NOTE: The rig pin is part of the rig pin kit F70207-69, -78 or -83.
____
 (2)  
F80055-1 - Trammel Bar

 (3)  
F71336-501 - Stabilizer Trim Lock

 B.
Consumable Materials

 (1)  
C00259 Primer - BMS 10-11, Type 1

 C.
References

 (1)  
22-11-31/501, Stabilizer Position Sensor

 (2)  
27-31-00/201, Elevator and Tab Control System

 (3)  
27-31-00/501, Elevator and Tab Control System

Neutral Shift Crank Support Bearing Installation
Figure 404

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737-300/400/500MAINTENANCE MANUAL
 D. Access
 (1)  
Location Zone
 101 Control Cabin, LH
 102 Control Cabin, RH
 704 Tail Cone
 711 Elevator and Tab, LH
 712 Elevator and Tab, RH

 (2)  
Access Panels
 3701 Stabilizer Trim Access Door
 3801 Tail Cone Access Door, LH
 3802 Tail Cone Access Door, RH

 E.
Procedure

 S 624-024
 (1)  
If you replace the support bearings of the neutral shift crank, apply the primer to the bearings:

 (a)  
Remove the bearing with the inner and the outer bearing retainers from the short end of the neutral shift crank.

 (b)  
Remove the two nuts, bolts, and washers from the clevis crank at the long end of the neutral shift crank. 1) Remove the retainer.

 (c)  
Remove the bearing with the inner and the outer bearing retainers from the long end of the neutral shift crank.
　
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