52-31-02
 ú ú 01 Page 802 ú Oct 15/98
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A
747-400 MAINTENANCE MANUAL
 S 428-016
 (16)
 Attach the universal joint (5) to the aft end fitting with the a new pivot pin (4).

 S 428-017

 (17)
 Install the bolt (3) through the universal joint (5) and the pivot pin (4).

 S 428-018

 (18)
 Assemble the washer (1) and nut (2) on the bolt (3).

 S 428-022

 (19)
 Tighten the nut (2).

 S 418-019

 (20)
 Attach the aft end fitting to the airframe structure (AMM 52-31-02/401).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH NOSE CARGO DOOR ú

 52-31-02
 ú ú 01 Page 803 ú Oct 15/98
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747-400 MAINTENANCE MANUAL
LINEAR ACTUATOR (2 LOCATIONS)
DRIVE FWD
COUPLING
FLEXIBLE DRIVE SHAFT
9. KEY  7. COLLAR 
8. SHEAR LOCKBOLT 
6. AFT END 
FITTING 

RIG PIN HOLE
10. BALLSCREW
SHAFT INSPECTION HOLE
AFT END FITTING REMOVAL A
11. KEY PIN
ACCESS THROUGH END OF FITTING
KEY ACCESS AND INSTALLATION B
Nose Cargo Door Linear Actuator Installation Figure 801
SEEA B
1.
 WASHER

2.
 NUT

3.
 BOLT

5. UNIVERSAL JOINT
4. PIVOT PIN
H35722
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH NOSE CARGO DOOR ú

 52-31-02
 ú ú 01 Page 804 ú Oct 15/98
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A
747-400 MAINTENANCE MANUAL
 NOSE CARGO DOOR DRIVE UNIT - REMOVAL/INSTALLATION
_________________________________________________
 1.  General_______
 A. This procedure has two tasks:
 (1)  
The removal of the drive unit on the nose cargo door

 (2)  
The installation of the drive unit on the nose cargo door

 TASK 52-31-03-004-001
 2.  Nose Cargo Door Drive Unit Removal (Fig. 401)__________________________________
 A. Access
 (1)  
Location Zones
 801 Nose Cargo Door

 B.
Prepare For Removal

 S 864-002
 (1)  
Make sure the nose cargo door is closed.

 S 014-003

 (2)  
Remove lining panels from the nose cargo door to get access to the drive unit.

 S 864-004

 (3)
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

 C.
Drive Unit Removal

 (1)
Disconnect the electrical plugs on the drive unit (Detail A).

 S 034-006

 (2)  
Remove bolts, washers and nuts from two couplings to disconnect the two flexible drive shafts from the drive unit.

 S 034-005
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-31-03
 ALL  ú ú 02 Page 401 ú Feb 10/94
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A

747-400
MAINTENANCE MANUAL

CSEE D LINEAR ACTUATOR END FITTING 
FLEXIBLE DRIVE SHAFT SEE A DRIVE UNIT 
BSEE PUSH-PULL CAM 
ELECTRICAL (POWER) PLUG  (4 LOCATIONS) NUT WASHER BOLT
DRIVE UNIT SUPPORT 
DRIVE UNIT 
ELECTRICAL (CONTROL) PLUG 
　
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