WARNING: MAKE SURE THAT YOU INSTALL THE GROUND LOCK ASSEMBLIES IN
_______ THE MAIN LANDING GEAR TO PREVENT THE ACCIDENTAL OPERATION OF THE GEAR. IT CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT IF THE GEAR RETRACTS.

Figure 401
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 (k) (l) (m)  Do a check on the cylinder hydraulic connections for leakage.Extend the gear and install the ground lock assembly (AMM 32-00-01).Lower the airplane.
 NOTE:____ Remove the jacks.

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A
737-300/400/500MAINTENANCE MANUAL
 NOSE GEAR LOCK MECHANISM - REMOVAL/INSTALLATION
_______________________________________________
 TASK 32-33-51-004-001
 1. Nose Gear Lock Mechanism Removal (Fig. 401)
________________________________
 A. Equipment
 (1)  
Ground Lock Assemblies (AMM 32-00-01/201)

 B.
Prepare for the procedure.

 S 864-002
 (1)  
Make sure that you install the ground lock assemblies in the main gear (AMM 32-00-01/201).

 S 864-012

 (2)  
Lift the airplane nose until the nose gear wheels are clear the ground (AMM 07-11-21/201).

 S 864-013

 (3)  
Remove the ground lock assembly for the nose gear
 (AMM 32-00-01/201).

 C.
Procedure

 S 024-003
 (1)  
Remove the bolt (14) to disconnect the lock link (6) from the drag brace upper and the lower links (8) and (13):

 (a)  
Remove the spacer bushing (11) and (12) from each lock link (6).

 (b)  
Remove the bolt from the bottom end of the lock actuator.

 (c)  
Remove the nuts and washers from each end of the lock brace shaft (19).

 (d)  
Extend the springs (1) and (5).

 NOTE: Move the ends of the spring off the lock brace
____
 shaft (19).

 (e)  Remove the bolt (17) and the shaft (19).
 NOTE: You can put laminated shims between the lock brace (3)
____ and the fitting (20). Keep the shims for the re-installation.
 (f) Remove the lock sensor from the support bracket.
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SEE A
SEE D
SEE B
SEE  C 
20. FITTING 
5. SPRING  19. SHAFT  17. BOLT ACTUATOR 16. LOCK
 ATTACHMENT 18. UPPER BOLT 
HOSES HYDRAULIC 1  3. LOCK BRACE  1. SPRING 
LOCKBRACE  A  FWD 
HOSE GUARD 1 
FWD 

D
1 NOT ON ALL AIRPLANES
Nose Gear Lock Mechanism Installation Figure 401 (Sheet 1)
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A

737-300/400/500
MAINTENANCE MANUAL

SPRING  SHIM 
RETAINER BOLT  7. NUT 
SHIM 
1. SPRING 
7. NUT 
6. LOCK LINK 
21. LOCK SENSOR TARGET 
2. INDICATORS 
5. SPRING  3. LOCK BRACE 
4. BOLT 
FWD 
　
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