A

ON AIRPLANES WITH CABLE CLIP WITH A SHEAVE ON AIRPLANES WITH CABLE CLIP WITH A SERRATED PLATE OR PLATE
Counterbalance Cable Alignment
Figure 402 (Sheet 2)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
B66753
A 737-300/400/500MAINTENANCE MANUAL
CARGO DOOR  CABLE  2  (2 LOCATIONS) TERMINAL FITTING 3  (t, INCHES) TOTAL CABLE ASSEMBLY LENGTH
TYPE OF CABLE ATTACHMENT  POSITION  LENGTH (l, INCHES)  DIAMETER (INCHES) STOCK  SWAGED LENGTH (f, INCHES)  BOEING STANDARD 
PLATE (NOT ADJUSTABLE)  FORWARD  36.0  0.125  0.50  BACT14A4  37.0 
PLATE (NOT ADJUSTABLE)  AFT  35.0  0.125  0.50  BACT14A4  36.0 
SERRATED PLATE  FORWARD  36.0  0.125  0.50  BACT14A4  37.0 
SERRATED PLATE  AFT  34.0  0.125  0.50  BACT14A4  35.0 
SHEAVE  FORWARD  39.88  0.125  0.50  BACT14A4  40.88 
SHEAVE  AFT  37.75  0.125  0.50  BACT14A4  38.75 

CABLE ASSEMBLY DIMENSIONS 1

TERMINAL
CABLE
FITTING
(2 LOCATIONS) CABLE ASSEMBLY WITH A SHEAVE (EXAMPLE)

THIS INFORMATION IS FOR REFERENCE ONLY. REFER TO THE IPC 52-31 FOR SPECIFIC PART NUMBERS. CARBON STEEL PER BMS 7-265, TYPE I, COMP A (TZ) RECOMMENDED
CARBON STEEL PER BMS 7-265, TYPE I, COMP A (OPTIONAL)
3 CORROSION RESISTANT STEEL PER MIL-T-781.
Counterbalance Cable Figure 403
B65792
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 ú  B03  Page 409
 ú  Nov 15/96 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 CARGO COMPARTMENT DOOR BALANCE MECHANISM - REPAIRS
__________________________________________________
 1.  General_______
 A.  This procedure conatains a task to use to remove a counterbalance mechanism after the cable is broken.
 B.  During this task you will use a wrench to turn the cam shaft on the counterbalance. This compresses the springs in the counterbalance. Then, you will put a nut and washer on the guide pin to hold the springs in the compressed position while you release the wrench. Repeat this process until the springs are compressed enough to allow access to the fasteners that hold the counterbalance to the door.
 C.  If the counterbalance cable is broken, it is likely that the bearing in the idler has been damaged. Replace this bearing before you re-install the counterbalance.
 TASK 52-31-12-308-004-B00
 2.  Remove the Counterbalance Assembly (if the cable is broken)___________________________________________________________
 A.  Standard Tools and Equipment
 (1)  
Nut - BACN10YRCD (3/8, Self-Locking)

 (2)  
Washer - AN960C616

 (3)  
.500 x 20 jam nut (for example NAS1423-8)

 B.  
References

 (1)
AMM 52-31-12/401, Cargo Compartment Door Balance Mechanism

 C.  
Access

 (1)  
Location Zones
 209 Forward Cargo Door
 219 Aft Cargo Door

 D.  
Remove the Balance Mechanism

 S 018-001-B00
 (1)  
Prepare to remove the balance mechanism:

 (a)  
Remove the lining retainer studs.

 (b)  
Remove the insulation from the door inner skin.

 S 028-002-B00
 (2)  
Remove the counterbalance mechanism.

 (a)  
On counterbalances with a sleeve over the guide pin, put a screwdriver in the end of the counterbalance mechanism to remove the screw and washer from the end of the guide pin.

 (b)  
Make sure there are at least three threads visible on the cam axle shaft. 1) Tighten the nut on the cam axle shaft or replace it with a

 jam nut if it is necessary to make three threads visible.