(d)  
Push on one of the left brake pedals slowly until the pressure gage on the left side brake shows more than 1000 psig.

 (e)  
Make sure the AUTOBRAKE selector switch moves to the DISARM position.

 (f)  
Do the Autobrake Application Test procedure in the "Ground Tests - Brake Control System" task (AMM 32-42-00/501).

 NOTE: It is not necessary to install a pressure gage on each
____ side of the airplane, as specified in the given procedure. A pressure gage must be installed on only a left side brake unit to do a test of the left autobrake shuttle valve.
 (g)  Do a check for leaks at the autobrake shuttle valve.
 NOTE: As an option, put the left side of the airplane back to
____ its usual condition before you continue the test on the right autobrake shuttle valve (AMM 32-42-12/201).
 S 712-128
 (2)  
Do these steps to do a test of the right autobrake shuttle valve:

 (a)  
Do these steps to install a pressure gage at a brake unit on the right side of the airplane: 1) Make sure that the parking brake is released. 2) Make sure that the brakes are not operated manually.

 WARNING: DO NOT OPERATE THE BRAKES WHEN YOU CONNECT OR
_______ DISCONNECT THE TWO PARTS OF A HYDRAULIC BRAKE DISCONNECT. IF YOU TRY TO CONNECT OR DISCONNECT A HYDRAULIC BRAKE DISCONNECT WITH THE BRAKE IN OPERATION, A HIGH PRESSURE RELEASE OF HYDRAULIC FLUID CAN OCCUR. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-42-12
 ALL  ú ú 02 Page 215 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 3)  To remove all pressure from the brake unit, disconnect the hose half of the hydraulic brake disconnect from the brake half.
 4)  Remove the lockwire that safeties the adapter of the brake bleeder assembly to the brake unit housing.
 NOTE: Each brake bleeder assembly has a bleeder valve
____ installed in an adapter. The adapter is installed in the brake unit housing.
 5) Remove the bleeder assembly from the brake unit housing.
 CAUTION: BE CAREFUL DURING THE INSTALLATION OF THE PRESSURE
_______ GAGE IN THE PORT ON THE BRAKE UNIT HOUSING. DO NOT INSTALL THE PRESSURE GAGE WITH MORE THAN 110 POUND-INCHES OF TORQUE. IF YOU USE TOO MUCH TORQUE DURING THE INSTALLATION OF A PRESSURE GAGE, YOU CAN CAUSE DAMAGE TO THE BRAKE UNIT HOUSING.
 6) Install a pressure gage in the bleeder assembly port of the brake unit housing. 7) Connect the hose half of the hydraulic brake disconnect to the brake half.
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (b)  
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).

 (c)  
Set the AUTOBRAKES selector switch to one of the five possible positions that arm the system to make a landing (1, 2, 3, 4, or MAX AUTO).

 (d)  
Push on one of the right brake pedals slowly until the pressure gage on the right side brake shows more than 1000 psig.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-42-12
 ALL  ú ú 02 Page 216 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (e)  
Make sure the AUTOBRAKE selector switch moves to the DISARM position.

 (f)  
Do the Autobrake Application Test procedure in the "Ground Tests - Brake Control System" task (AMM 32-42-00/501).

 NOTE: It is not necessary to install a pressure gage on each
____ side of the airplane, as specified in the given procedure. A pressure gage must be installed on only a right side brake unit to do a test of the right autobrake shuttle valve.
 (g)  Do a check for leaks at the autobrake shuttle valve.
 S 862-129
 (3)
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 起落架 LANDING GEAR 7(87)