S 862-002
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A
747-400
MAINTENANCE MANUAL

SEE A
SEE A
SEE B SEE B
GROUND SERVICE DISCONNECT FOR THE RETURN LINE
FWD
A
GROUND SERVICE DISCONNECT FOR THE PRESSURE MODULE
B
FWD
Hydraulic System Ground Service Disconnects Figure 202
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747-400
MAINTENANCE MANUAL

SEE A
BLEED VALVE FOR THE RESERVOIR PRESSURIZATION MODULE
A
FWD
Reservoir Pressurization Module Bleed Valve
Figure 203

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MAINTENANCE MANUAL

EICAS Hydraulic Synoptic Page
Figure 204

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747-400 MAINTENANCE MANUAL
 2) 7G3 HYDRAULICS HYDIM 2
 3) 7H3 HYDRAULICS HYDIM 3
 4) 7J3 HYDRAULICS HYDIM 4

 (b)  
P415 Main Power Distribution Panel
 1) 415K37 HYD PRESS IND SYS 1
 2) 415K38 HYD PRESS IND SYS 2
 3) 415K39 HYD PRESS IND SYS 3

 (c)  
P414 Main Power Distribution Panel
 1) 414G23 HYD 4 PRESS IND

 S 012-004
 (3)  Open the fairing doors on the trailing edge of the strut (AMM 54-62-00/201).
 S 982-005
 WARNING: MAKE SURE ALL THE PERSONS AND THE EQUIPMENT ARE AWAY FROM THE
_______ DOOR OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (4)  
Open the doors for the left body gear:

 (a)  
Move the ground release handle in the wheel well for the left body gear to the DOORS OPEN position.

 (b)  
Let the doors fully open.

 S 492-006
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  Do this task for the body gear and the wing gear: "Landing Gear Door Lock Installation" (AMM 32-00-30/201).
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 S 862-007
 (6)  Release the pressure in the pneumatic system (AMM 36-00-00/201).
 S 862-008
 (7)  Operate the bleed valve on the reservoir pressurization module to
 release the air pressure in the reservoir.
 S 492-463
 (8)  Connect the hydraulic service cart:
 (a)  Connect the return hose on the hydraulic service cart to the
 ground service disconnect on the return module.
 NOTE:____ There is an access door below the ground service
　
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