NOTE: Manually open the cargo door if electrical power is off.
____ Work around a locked hook actuator if it is necessary (Ref 52-34-00/001).
 S 214-019
 (2)
Look for rigging pin holes in the hook support fittings (Fig. 401).

 S 354-020

 (3)  
Drill rigging pin holes in the hook support fittings if it is necessary (Ref 52-34-00/801).

 S 864-003

 (4)  
Open these circuit breakers for the applicable cargo door and attach DO-NOT-CLOSE tags:

 (a)  
P59 Aft Equipment Panel
 1) AFT CARGO DOOR POWER UNITS

 (b)  
P414 Power Distribution Center - Left
 1) 414A21 LOWER CARGO DOOR FWD
 2) 414F15 CARGO DOOR CONTROL FWD
 3) 414F16 CARGO DOOR CONTROL AFT

 S 984-004
 (5)  
Manually turn the hook actuator mechanism to the closed position (Fig. 401).

 (6)  
Install the rig pins in the forward and aft hooks.

 (7)  
Remove the lower door lining.

 S 034-007

 (8)  
Disconnect the electrical cable at connector P1 from the hook actuator.

 S 494-005
 S 014-006
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747-400 MAINTENANCE MANUAL
 S 034-008
 (9)  
Remove the torque tube (4) from the spline on the hook actuator as follows:

 (a)  
Disconnect the two clamps (5) to remove the torque tube coupling (11).

 (b)  
Pull the torque tube (4) away from the actuator splines.

 S 024-009
 (10)
 Remove the four bolts that hold the hook actuator (3) to the support bracket (2)

 S 824-023

 (11)
 Pull the hook actuator in the aft direction.

 NOTE: Make sure the actuator (3) is clear of the torque tube (1)
____ (View A, Fig. 401). When you pull the hook actuator, make sure you do not move the shims.
 TASK 52-34-07-404-010
 3.  Hook Actuator - Installation
____________________________
 A.  Special Tools and Equipment
 (1)  
MIT65B04000 Kit (Rigging Pins) ~................................................................. |Assy No.| Rigging Pin No.|Length (inch) | Dia (inch) | Qty | ................................................................... | -3 | LCD-1 | 3.0 | 0.187 | 2 | 2........…................…...............…...............….......1

 B.  
Standard Tools and Equipment

 (1)  
Wrench - Torque, 30-40 pound-inches

 (2)  
Bonding Meter (Ref 20-22-01/601)

 C.  
Consumable Materials

 (1)  
D00013 Grease - MIL-G-23827

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747-400
MAINTENANCE MANUAL

 D. Parts
 (1)  FORWARD CARGO DOOR;
 Refer to the table that follows:

 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 3 |Actuator | 52-34-07 | 02 | 470 | | | 4 |Tube Assy (Torque Tube) | | | 485 | | | 11 |Coupling | | | 475 | | | 15 |Bolt | | | 415 | | | 16 |Washer | | | 420 | | | 17 |Washer | | | 425 | | | 18 |Nut | | | 430 | 2......…........…...................................…..........…......…........1
 (2)  AFT CARGO DOOR;
 Refer to the table that follows:

 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 3 |Actuator | 52-34-07 | 03 | 500 | | | 4 |Tube Assy (Torque Tube) | | | 470 | | | 11 |Coupling | | | 395 | | | 15 |Bolt | | | 510 | | | 16 |Washer | | | 530 | | | 17 |Washer | | | 535 | | | 18 |Nut | | | 55 | 2......…........…...................................…..........…......…........1
　
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