not more than 25 pounds. 2) Make sure the force that is necessary to close the door is not more than 5 pounds.

 (c)  
Adjust the balance mechanism if it is necessary: 1) Remove the cover from the end of the spring tube. 2) Turn the nut that holds the cable to change the force you

 use to open the door. 3) Install the cover on the end of the spring tube.

 (d)  
Connect the snubber to the forward door hinge.

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A
747-400 MAINTENANCE MANUAL
 BULK CARGO DOOR BALANCE MECHANISM - INSPECTION/CHECK
____________________________________________________
 1.  General_______
 A.  This procedure contains a task that is an inspection of the balance mechanism on the bulk cargo door.
 TASK 52-36-02-216-008
 2.  Examine the Bulk Cargo Door Balance Mechanism (Fig. 601)._____________________________________________
 A.  References
 (1)
IPC 52-36-02 Fig 2

 B.  
Access

 (1)  
Location Zone
 146 Bulk Cargo Compartment, RH

 (2)  
Access Panels
 823R Door - Bulk Cargo Compartment

 C.  
Procedure

 S 866-002
 (1)
Open the bulk cargo door to get access to the balance mechanism.

 S 216-003

 (2)
Examine the cables for corrosion and damage.

 S 216-006

 (3)
Examine the attach fittings for corrosion and damage.

 S 216-004

 (4)
Examine the spring tube.

 (a)
Make sure the spring tube is in good mechanical condition.

 (b)
Make sure the spring tube is attached correctly.

 S 216-007
 (5)
Examine the cable drum.

 (a)
Make sure the cable drum is in good mechanical condition.

 (b)
Make sure the cable drum is attached correctly.

 (6)
Close the bulk cargo door.

 S 416-005
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SEE A
CABLE ATTACHMENT CABLE DRUM
BALANCE
CABLES

SPRING
TUBE
FWD
A
Bulk Cargo Door Balance Mechanism Figure 601
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-36-02
 ALL  ú ú 01 Page 602 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 BULK CARGO DOOR UPLATCH HOOK - REMOVAL/INSTALLATION
___________________________________________________
 1.  General_______
 A. This procedure contains two tasks:
 (1)  
The first task is the removal of the uplatch hook from the ceiling panel in the bulk cargo compartment.

 (2)  
The second task is the installation of the uplatch hook on the ceiling panel in the bulk cargo compartment.

 B.
The uplatch hook is used to keep the bulk cargo door in an open position.

 TASK 52-36-03-004-001
 2.  Door Uplatch Hook - Removal___________________________
 A. References
 (1)  
25-55-02/401, Bulk Cargo Compartment Ceiling and Sidewall Lining

 (2)  
IPC 52-36-03 Fig. 2

 B.
Access

 (1)  
Location Zone
 146 Bulk Cargo Compartment, RH

 (2)  
Access Panel
 823R Door - Bulk Cargo Compartment
　
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