(3)  
You will release the gas from the hydraulic pressure surge accumulator.

 (4)  
You will disconnect the tube from the pressure gage.

 (5)  
You will remove the screws and remove the pressure gage.

 D.  
These steps are necessary to install the pressure gage:

 (1)  
You will install the pressure gage with four screws.

 (2)  
You will connect the tube to the pressure gage.

 (3)  
You will fill the hydraulic pressure surge accumulator with gas.

 (4)  
You will pressurize the hydraulic system 4.

 (5)  
You will examine the pressure gage for leaks.

 TASK 32-41-24-004-001
 2.  Hydraulic Pressure Surge Accumulator Pressure Gage Removal (Fig. 401)__________________________________________________________
 A.  References
 (1)  
AMM 09-11-00/201, Towing

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AIPC 32-41-10, Fig. 3

 (5)  
AIPC 32-41-32, Fig. 1

 B.  
Access

 (1)  
Location Zone 138 Body Landing Gear Well - Right 571 Rear Spar to Landing Gear Support Beam, Left 671 Rear Spar to Landing Gear Support Beam, Right

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 ALL  ú ú 01 Page 401 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400 MAINTENANCE MANUAL
SEE A
SEEB  SEEA
HYRDRAULIC PRESSURE CHARGINGSURGE ACCUMULATOR
INSTRUCTIONCHART
INBD
FWD
CHARGING VALVE 
PRESSURE GAGE  MANIFOLD ASSEMBLY  SEE  C 
SEE  D 

WING GEAR HYDRAULIC PRESSURE SURGE
ACCUMULATOR INSTALLATION

A

Hydraulic Pressure Surge Accumulator Pressure Gage Installation
Figure 401 (Sheet 1)

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 32-41-24
 ALL  ú ú 01 Page 402 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
HYDRAULIC PRESSURE SURGE ACCUMULATOR
TUBE TOPRESSURE GAGE
PRESSURE GAGE
SEE D
CHARGING VALVE
SEE C
DUST CAP
SWIVEL NUT
CHARGING INSTRUCTION CHART
BODY GEAR HYDRAULIC PRESSURE SURGE
ACCUMULATOR INSTALLATION

B
MANIFOLD
NUT
GAGE MOUNTING BRACKET
CHARGING VALVE
TUBE TO
MANIFOLD

C
SPACER WASHER
PLASTIC WASHER
WASHER
SCREW SHIELD
PRESSURE GAGE PLASTIC WASHER
PRESSURE GAGE

D

Hydraulic Pressure Surge Accumulator Pressure Gage Installation
Figure 401 (Sheet 2)

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 ALL  ú ú 01 Page 403 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 C. Prepare for the Removal
 S 494-002
 (1)  Make sure that the landing gear ground locks are installed
 (AMM 09-11-00/201).

 S 494-003
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR 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.
 (2)  
Install the door locks on the doors for the wing and the body landing gear (AMM 32-00-30/201).

 S 944-004

 (3)  
Make sure that the chocks are installed at all wheels.

 S 864-005

 (4)  
Release the parking brake.

 S 864-006

 (5)
Remove the pressure from the hydraulic system 4 (AMM 29-11-00/201).

 S 684-007
　
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