TASK 52-36-02-004-001
 2.  Remove the Balance Mechanism (Fig. 401)
____________________________
 A.  Special Tools and Equipment
 (1)  
MIT65B09269 Tool - Cable Restraining

 B.  
Standard Tools and Equipment

 (1)  
Streamer - Red (to advise CAUTION)

 (2)  
Pin - Safety, 0.25-inch diameter, 4.0-inch length

 C.  
References

 (1)  
IPC 52-36-02 Fig. 2

 D.  
Access

 (1)  
Location Zone
 146 Bulk Cargo Compartment, RH

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

 E.  
Procedure

 (1)  
Prepare to remove the balance mechanism.

 S 844-002
 WARNING: DO NOT TRY TO HOLD THE BALANCE MECHANISM CABLE WITH BLOCKS
_______ AND CLAMPS. BLOCKS AND CLAMPS CAN LET THE CABLE MOVE. IF THE CABLE MOVES QUICKLY, IT CAN CAUSE INJURY TO PERSONNEL.
 (a)  
While the door is closed, install the safety pin or the cable restraining tool on the spring tube.

 (2)  
Remove the balance mechanism.

 S 024-003
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-36-02
 ALL  ú ú 01 Page 401 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

SUPPORT
BRACKET

SPRING TUBE
CABLE
CLEVIS CABLE CSEE  DRUM SEE  A  SAFETY PIN HOLE  COVER SPRING TUBE 
SPRING TUBE  CLAMP 
BOLTS 
CABLE DRUM 
SEE  B 

BOLT ATTACH THE CABLE TO THE SPRING TUBE HERE 1
BOLT AND WASHER
SPRING TUBE
ATTACH THE CABLE
HI-LOKS
TO THE DOOR HERE 2
(2 LOCATIONS)
CABLE DRUM
BALANCE
CABLE CABLE SPRING TUBE BOLTS
A
CLEVIS
B
FORWARD HINGE ARM
CABLE CLEVIS C
1
THE HEAD OF THIS BOLT MUST POINT UP.
THE HEAD OF THIS BOLT MUST POINT DOWN.
2
Bulk Cargo Door Balance Mechanism Installation Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-36-02
 ALL  ú ú 01 Page 402 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 WARNING: BE CAREFUL WHEN YOU ARE NEAR THE DOOR AND THE BALANCE
_______ MECHANISM IS DISCONNECTED. IF YOU HIT THE DOOR, THE UPLATCH HOOK CAN RELEASE. IF THE UPLATCH HOOK RELEASES, THE DOOR WILL CLOSE QUICKLY. THIS CAN CAUSE INJURY TO PERSONNEL.
 (a)  
Lift the door to release the tension on the cable.

 (b)  
Remove the cable from the attach fitting on the door (Detail C).

 (c)  
If it is possible, close the door.

 NOTE: Do this if you must keep the door open:
____ -engage the uplatch hook
 -attach a red streamer to the uplatch handle.
 (d)  
Remove the cable that goes between the spring tube and the cable drum from the cable drum (Detail A).

 (e)  
Remove the cable drum.

 1)  Remove the bolt through the cable drum that engages the nutplate on the floor beam.
 WARNING: WHEN YOU REMOVE THE SPRING TUBE DO NOT REMOVE THE SAFETY
_______ PIN OR THE CABLE RESTRAINING TOOL. IF YOU REMOVE THE SAFETY PIN OR THE CABLE RESTRAINING TOOL, THE CABLE CAN RETRACT QUICKLY. THIS CAN CAUSE INJURY TO PERSONNEL.
 (f)  Remove the spring tube (Detail B). 1) Remove the bolt and Hi-Loks at the forward end of the
 spring tube. 2) Loosen the clamp around the middle of the spring tube. 3) Pull the spring tube away from the door.
 TASK 52-36-02-404-004
 3.  Install the Balance Mechanism (Fig. 401)_____________________________
 A.  Special Tools and Equipment
 (1)  
MIT65B09269 Tool - Cable Restraining

 (2)  
MIT65B09877-1 Tool - Spring Cartridge Assembly, Bulk Cargo Door

 B.  
Standard Tools and Equipment

 (1)  
Pin - Safety, 0.25-inch diameter, 4.0 inch length
　
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