SEE A
SEE A
Nose Cargo Door Wear Limits
Figure 601 (Sheet 1)

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A

747-400
MAINTENANCE MANUAL

FITTING  HINGE/BUSHING (2 LOCATIONS)
A-A
NO. INDEX  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  WORN PART REPLACE  PART WORN REPAIR  REPAIR INSTR 
DIAMETER  PER-MITTED WEAR DIM.  ANCE CLEAR-MAX DIA 
MIN  MAX 
1  BUSHING  ID  1.1245  1.1250  1.1280  0.0080  X 
BOLT  OD  1.1225  1.1240  1.1200  X 
2  BEARING  ID  1.1245  1.1250  1.1280  0.0080  X 
BOLT  OD  1.1225  1.1240  1.1200  X 
3  BODY HINGE  ID  1.3122  1.3122  1.3200  0.0080  X  1 
BUSHING  OD  1/3138  1.3138  1.3120  X 
4  BEARING  ID  2.5615  2.5620  2.5570  0.0100  X 
DOOR FITTING  OD  2.5612  2.5622  2.5570  X 

NOTE: ALL DIMENSIONS ARE IN INCHES. MAXIMUM OVERSIZE HOLE TO BE 1.3442 WITH 0.0006-0.0026 BUSHING INTERFERENCE.

Nose Cargo Door Wear Limits Figure 601 (Sheet 2)
B26886
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747-400 MAINTENANCE MANUAL
 NOSE CARGO DOOR LINEAR ACTUATOR - REMOVAL/INSTALLATION
______________________________________________________
 1.  General_______
 A. This procedure has two tasks:
 (1)
The removal of the linear actuator on the nose cargo door

 (2)
The installation of the linear actuator on the nose cargo door

 TASK 52-31-02-004-001
 2.  Nose Cargo Door Linear Actuator Removal (Fig. 401)_______________________________________
 A. General
 (1)
Do not operate the door with one linear actuator installed.

 B.
Standard Tools and Equipment

 (1)  
Rigging Pin - ND-2, 0.311 (+0.000/-0.002)-inch diameter, 2 inches long (2 required)

 C.
Access

 (1)  
Location Zones
 801 Nose Cargo Door

 D.
Prepare For Removal

 S 864-003
 (1)  
Make sure the nose cargo door is closed and latched.

 S 864-032

 (2)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:

 (a)  
On the Auxilary External 2 Power Center-Right panel P715: 1) 715XX, NOSE CARGO DOOR

 (b)  
On the Power Distribution Center-Right panel P415: 1) 415F16, NOSE CARGO DOOR CONTROL

 (c)  
On the Nose Cargo Door Power panel H122: 1) 122XX, DOOR LIFT 2) 122XX, PULL UP CAM 3) 122XX, LATCHES 1-4R 4) 122XX, LATCHES 1-4L 5) 122XX, LATCHES 5-8R 6) 122XX, LATCHES 5-8L

 S 014-005
 (3)  
Remove the ceiling and siewall closure panels to get access to the linear actuator.

 S 864-031

 (4)  
Unzip and stow thermal and acoustic seal which is installed all around door parting line.

 (5)  
Diconnect the drive shaft coupling from linear actuator (Detail E).

 S 034-006
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747-400
MAINTENANCE MANUAL

PUSH-PULL CAM 
　
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