(g)  
Adjust the door down switch at the other end of the door.

 S 825-025
 (2)  Adjust the door up switches as follows (Fig. 512):
 NOTE: You can use this procedure for the two door up switches.
____
 (a)  
If it is necessary to get access to the switches, open the two ceiling panels from second row of panels that are inboard of the door.

 (b)  
Install the weather barrier that encloses the lift mechanism.

 CAUTION:_______IN CASE THE DOOR DOES NOT OPEN, STOP IMMEDIATELY. DO NOT OPERATE THE DOOR CONTROL SWITCH. HOLDING THE DOOR CONTROL SWITCH MAY DAMAGE THE ACTUATOR. WAIT AT LEAST 1 MINUTE BEFORE SECOND ATTEMPT. IF THE DOOR STILL DOES NOT OPEN, WAIT AT LEAST 10 MINUTES BEFORE THIRD ATTEMPT.

 (c)  
Open the door and manually turn the lift power unit to get the correct clearance between the rotary actuator arm and the door upstop as shown in View A-A.

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A
747-400
MAINTENANCE MANUAL

A
DOOR UP SWITCH DOOR DOWN (2 LOCATIONS) SWITCH (2 LOCATIONS)
A
DOOR DOWN STOP
DOOR
DOWN ROTARY SWITCH ACTUATOR
DOWNSTOP CLEARANCE
0.20 INCH UPSTOP CLEARANCE ROTARY
0.20 INCH 1 ACTUATOR  1
0.06-0.18 INCH0.09-0.21 INCH 2
2 DOOR UP SWITCH
0.063 TO 0.071 INCH SWITCH CLEARANCE
3
0.032 TO 0.040 INCH SWITCH CLEARANCE
ROTARY 4
0.063 TO 0.071 INCH  ACTUATOR
POINT "B"
SWITCH CLEARANCE  ARM
POINT "F"
0.156 DIA
ROTARY ACTUATOR
ROTARY  RIGGING GAGE LINK
ACTUATOR
ARM

DOOR UP SWITCH ADJUSTMENT DOOR DOWN SWITCH ADJUSTMENT
A-A A-A

1
UPSTOP OR DOWNSTOP CLEARANCE FOR SWITCH OR MECHANISM ADJUSTMENT (LIFT POWER UNIT CRANKED MANUALLY TO OBTAIN 3 SWITCH CLEARANCE APPLICABLE IF 65B83648-1 CLEARANCE) ROTARY ACTUATOR LINK INSTALLED
2  UPSTOP OR DOWNSTOP CLEARANCE AFTER 4 SWITCH CLEARANCE APPLICABLE IF 65B83648-2 ELECTRICAL OPERATION STOPS ROTARY ACTUATOR LINK INSTALLED
Door Up and Door Down Switch Adjustment
Figure 512

H36786
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MAINTENANCE MANUAL

B 
A 
B  LATCH LOCK 
SECTOR 
A 
AUXILIARY DOOR 
CLOSED SWITCH 

DOOR 
CLOSED 
SWITCH  SWITCH 
SWITCH 
MOUNTING 
BRACKET 
1.09 INCHES FREE POSITION OF  INCHES 1.49 1.54 
CONTACTING STRIKING SWITCH PLUNGER (NOT  FREE POSITION OF SWITCH 
SURFACE)  SWITCH ACTUATOR) PLUNGER (NOT CONTACTING 
LATCH FITTING 
SWITCH 
MOUNTING  SWITCH 
BRACKET  ACTUATOR 
DOOR  DOOR SILL  LOWER LATCH 
CAM SHAFT 
A-A  B-B 

Door Closed Switches Adjustment
Figure 513

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H36815
A
747-400
MAINTENANCE MANUAL

MASTER LATCH LOCK SWITCH
A
A
LATCH LOCK SECTOR
LOWER LATCH CAM SHAFT
MASTER LATCH LOCK SWITCH  MASTER LATCH LOCK SWITCH 
SWITCH MOUNTING BRACKET  SWITCH MOUNTING BRACKET 
SWITCH ACTUATOR BRACKET  BRACKET SWITCH ACTUATOR 
0.983 INCH STARTING FREE HEIGHT POSITION  0.752 INCH CORRECT MEASURED HEIGHT 
LATCHES LOCKED POSITION  LATCHES UNLOCKED POSITION 
A-A  A-A 
　
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