S 415-012
 (2)  
Remove the door lining if it was not removed.

 S 865-013

 (3)  
Supply electrical power (Ref 24-22-00/201).

 H.
Adjust the Side Cargo Door Mechanisms (Fig. 501 through 509)

 (1)  
Adjust the Master Latch Lock Mechanism as follows (Fig. 501)

 S 825-014
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A
747-400 MAINTENANCE MANUAL
FWD PRESSURE RELIEF DOOR DRIPSHIELDMASTER LATCH (2 LOCATIONS)LOCK HANDLE
MASTER LATCH
PRESSURE RELIEF LOCK MECHANISM
DOOR TORQUE TUBE
HOOK ACTUATOR
LATCH ACTUATOR
MASTER LATCH LOCK SECTOR (10 LOCATIONS)
PRESSURE RELIEF DOOR
PRESSURE RELIEF
DOOR TORQUE TUBE

A
PRESSURE RELIEF DOOR PUSHROD
MASTER LATCH
CA
LOCK EXTERIOR HANDLE
B
MANUAL HANDLE STOP
SEE A
CB
MASTER LATCH LOCK
LOCK SECTOR
TORQUE TUBE
LATCH CAM

(10 LOCATIONS)
FWD (10 LOCATIONS)
MASTER LATCH LOCK MECHANISM
Master Latch Lock Mechanism Adjustment
Figure 501 (Sheet 1)

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H36189
A
747-400
MAINTENANCE MANUAL

MASTER LATCH LOCK TORQUE TUBE
SECTOR
B-B
Master Latch Lock Mechanism Adjustment Figure 501 (Sheet 2)
H36196
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A
747-400
MAINTENANCE MANUAL

LOWER LINK
C-C
Master Latch Lock Mechanism Adjustment Figure 501 (Sheet 3)
H36225
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A

747-400
MAINTENANCE MANUAL

FWD
HOOK
RESTRAINT
MECHANISM

HOOK ACTUATOR
(2 LOCATIONS)
LATCH ACTUATOR HOOK MECHANISM
HOOK RESTRAINT SOLENOID (2 LOCATIONS)
HOOK SHAFT
HOOK RESTRAINT ARM
(2 LOCATIONS)
(2 LOCATIONS)
A B
HOOK ACTUATOR (2 LOCATIONS)
B
A HOOK SHAFT HOOK TORQUE
PUSHROD TUBE
(2 LOCATIONS) (2 LOCATIONS)

HOOK
(2 LOCATIONS)

HOOK MECHANISM
Hook Mechanism Adjustment Figure 502 (Sheet 1)
H36234
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A
747-400 MAINTENANCE MANUAL
INBD 
HOOK RESTRAINT 
ARM 
HOOK 
TORQUE 
TUBE 
RESTRAINT 
ARM STOP 
HOOK 
SHAFT  RESTRAINT 
PUSHROD  SOLENOID 
RIG PIN HOLE 
HOOK  (SCD-5) 
SEE  A 
HOOK 
HOOK  SHAFT 
CLOSED 
SWITCH 
HOOK OPEN 
SWITCH  SOLENOID 
PLUNGER  EYEBOLT 
A-A  RESTRAINT ARM  EYEBOLT TO 
　
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