B.  
Prepare for the Removal

 S 864-052
 WARNING: MAKE SURE THE GROUND LOCK PINS ARE INSTALLED ON ALL THE LANDING
_______ GEAR. WITHOUT THE GROUND LOCK PINS, THE LANDING GEAR COULD RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  
If the ground lock pins are not installed in the nose and the main landing gear, install the ground lock pins (AMM 32-00-01/201).

 (2)  
Remove the pressure from the hydraulic system A (AMM 29-15-00/201).

 (3)
Open all circuit breakers for the landing gears on the panel P6.

 (4)  
Lift the airplane with the jacks (AMM 07-11-11/201).

 S 864-025
 S 864-026
 S 584-028
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A
737-300/400/500MAINTENANCE MANUAL
SEE D
SEE B
SEE A
SEE C
SEE E
1. SPECIAL  WASHERSEE G
2. COLLAR  BOLT
6.
 SHIMS

7.
 SUPPORT FRAME

1
SEE F
6. SHIMS
A
A

CHAMPFER
8. UPLOCK SUPPORT
A-A  3. CRANK FITTING
 COLLAR
A
5. UPLOCK  4. UPLOCK SUPPORT CRANK SHAFT
 FWD INBD
B
9. BEARING
WASHER (EXAMPLE)
12. ACTUATOR PIN
4. UPLOCK CRANK
9. BEARING
 FWD INBD
CUTOUTS FORSTOP LINK
10.
 LINK

11.
 LINK ATTACHMENT

 ASSEMBLY BOLT
1
INSTALL CRANK COLLAR SO IT
INTERLOCKS WITH UPLOCK CRANK.
THE CRANK COLLAR DRIVES THE
UPLOCK CRANK. C

Main Gear Uplock Mechanism Installation
Figure 401 (Sheet 1)

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A
737-300/400/500MAINTENANCE MANUAL
17. UPLOCK ACTUATOR
14. UPLOCK SPRING
4. UPLOCK
CRANK

13.
 HOOK ATTACHMENT BOLT

14.
 UPLOCK SPRING

15.
 UPLOCK HOOK

16.
 SPRING  PIN

FWD INBDSIDE STRUT (TYPICAL)
E
19. UPPER SPRING
D
SHAFT
18. SPACER
18. SPACER
10. LINK
 ASSEMBLY

15. HOOK
21. BOLT
4. UPLOCKSTOP LINK
CRANKCUTOUTS
20. STOP LINK
22. LOWER SPRING
 SHAFT

24. REACTION LINK 23. CRANK
F
ATTACHMENT BOLT
UPPER SIDE STRUT FWD INBD
G
Main Gear Uplock Mechanism Installation
Figure 401 (Sheet 2)

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737-300/400/500MAINTENANCE MANUAL
 S 024-027
 (5)  
Remove the uplock sensor and the mounting bracket
 (AMM 32-61-21/401).

 C.
Main Landing Gear Uplock Assembly Removal

 S 034-029
 (1)  
Disconnect the uplock actuator (17):

 (a)  
Remove the nuts, the washers, and the bearings (9) from the actuator pin (12).

 (b)  
Remove the actuator pin (12) to disconnect the uplock link assembly (10) from the actuator uplock (17).

 (c)  
Move the inboard end of the uplock actuator (17) from the wok area.

 S 034-044
 (2)  
Remove the nut, the washer, and the crank attachment bolt (23) to disconnect the uplock crank (4) from the upper side strut.

 S 034-030

 (3)  
Disconnect the uplock assembly from the support frame (7), and the uplock support fitting (8):
　
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