(2)  
AMM 24-22-00/201, Manual Control

 (3)  
AMM 29-11-04/501, Hydraulic Supply Shutoff Valve

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747-400
MAINTENANCE MANUAL

 (4)  
AMM 36-00-00/201, Pneumatic System

 D.
Access

 (1)  
Location Zone
 452 System 1 - Strut Torque Box - Right Side
 412 Engine 1 - Gearbox Forward Face 5:00 o'clock
 462 System 2 - Strut Torque Box - Right Side
 422 Engine 2 - Gearbox Forward Face 5:00 o'clock
 472 System 3 - Strut Torque Box - Right Side
 432 Engine 3 - Gearbox Forward Face 5:00 o'clock
 482 System 4 - Strut Torque Box - Right Side
 442 Engine 4 - Gearbox Forward Face 5:00 o'clock

 (2)  
Access Panel
 452C Upper Midspar Pressure Relief Door - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 462C Upper Midspar Pressure Relief Door - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 472C Upper Midspar Pressure Relief Door - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 482C Upper Midspar Pressure Relief Door - Engine 4
 446 Right Thrust Reverser Half - Engine 4

 E.
Procedure

 S 034-018
 (1)  
Remove the caps from the adapter flange ports.

 S 424-019

 (2)  
Install the hydraulic shutoff valve (8):

 (a)  
Lubricate the new packings (10) with hydraulic fluid.

 (b)  
Install the packings (10) in the grooves in the inlet and outlet surfaces of the hydraulic shutoff valve (8).

 (c)  
Lubricate the adapter flanges (14) and the mating surfaces of the hydraulic shutoff valve (8) with hydraulic fluid.

 (d)  
Put the hydraulic shutoff valve (8) between the adapter flanges (13).

 (e)  
Install the bolts (9), the washers (11), and the nuts (12). 1) Tighten the bolts.

 (f)  
Connect the electrical connector (13). 1) Tighten the connector with your fingers plus 1/8 of a turn.

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747-400 MAINTENANCE MANUAL
 2) Install a lockwire on the connector.
 S 434-020
 (3)  
Install the three piece clamp block assembly:

 (a)  
Install the block halves (6 and 7).

 (b)  
Install the spacers (5).

 (c)  
Install the cap angle (3) and the block half (4).

 (d)  
Install the bolts (1) and the washers (2). 1) Tighten the bolts.

 S 864-021
 (4)  
Close the applicable EDP HYD SUPPLY circuit breaker:

 (a)  
P7 Overhead Circuit Breaker Panel 1) 7J4 EDP SUPPLY 1 2) 7J5 EDP SUPPLY 2 3) 7J6 EDP SUPPLY 3 4) 7J7 EDP SUPPLY 4

 (5)  S 614-022Do this task:  "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).
 (6)  S 864-023Do this task: "Pneumatic System Pressurization" (AMM 36-00-00/201). (a) Make sure the reservoir stays pressurized during the leak test.
 (7)  S 714-024Do this task: "Hydraulic Supply Shutoff Valve Operational Test" (AMM 29-11-04/501).
 S 794-025

 CAUTION: IMMEDIATELY CLEAN ALL HYDRAULIC FLUID THAT FALLS ON THE
_______ AIRPLANE PARTS. HYDRAULIC FLUID CAN CAUSE DAMAGE TO THE AIRPLANE STRUCTURE.
 (8)  
Examine the installation of the hydraulic shutoff valve (8) for leakage.

 (a)  
If you find leakage, repair the cause of it.

 S 794-026
 (9)
Examine the connection of the EDP supply hose for leakage.

 (a)
If you find leakage, repair the cause of it.
　
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