(3)  
AMM 32-00-20/201, Landing Gear Downlocks

 (4)  
AMM 32-44-00/001, Parking Brake System

 C.  Access
 (1)  
Location Zone
 197 Wing to Body - Aft Lower Half (Left)

 (2)  
Access Panel
 197KL Hydraulic Bay Access Door

 D.  Procedure
 S 213-006
 (1)  
Make sure the downlocks on the nose and main landing gear are installed (AMM 32-00-20/201).

 (2)  
Put chocks on the landing gear wheels.

 S 863-008

 (3)  
Remove the pressure from the main left and right hydraulic systems (AMM 29-11-00/201).

 (4)
Release the parking brake, if it is set (AMM 32-44-00/001)

 S 493-007
 S 863-009
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-15-04
 ALL  ú ú 01 Page 301 ú Sep 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

CHARGING VALVE
SEE B
PARKING BRAKE ACCUMULATOR
TO THE CHARGING VALVE
PARKING BRAKE  FWD 
ACCUMULATOR 
CHARGING LINE 
(REF)  SEE  A 

HYDRAULIC LINE (REF)
PRESSURE TRANSMITTER (REF)
PARKING BRAKE ACCUMULATOR
A
Parking Brake Accumulator Servicing Location Figure 301 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-15-04
 ALL  ú ú 01 Page 302 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 757 MAINTENANCE MANUAL
TO THE PARKING
BRAKE ACCUMULATOR

CHARGING VALVE

PLACARD

Parking Brake Accumulator Servicing Location
Figure 301 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-15-04
 ALL  ú ú 01 Page 303 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 (5)  S 013-002Open the hydraulic bay access door, 197KL, to get access to the charging valve for the parking brake accumulator (AMM 06-41-00/201).
 NOTE:____ The parking brake accumulator is installed in the right wheel well but it is not necessary to get access to it for this procedure.
 (6)  S 863-014Operate the left and right brake pedals a minimum of seven times to release the pressure from the parking brake accumulator.
 (7)  S 863-015Wait ten minutes after you have released the pressure from the parking brake accumulator or until the accumulator temperature becomes stable.
 (8)  S 213-003Look and make sure the pressure shown on the pressure gage, found adjacent to the charging valve, is in the range shown on the placard (View B).
 (9)  S 613-004If the pressure shown is not in the range shown on the placard (View C), do the steps that follow to fill the parking brake accumulator. (a) Operate the left and right brake pedals a minimum of seven times to remove the pressure from the parking brake accumulator. (b) Remove the dust cap from the charging valve. (c) Attach the nitrogen source to the charging valve.
 WARNING:_______ DO NOT LOOSEN THE CHARGING VALVE. THE INTERNAL PRESSURE COULD BLOW THE CHARGING VALVE OUT, AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (d) (e)  Loosen the swivel nut one turn.Fill the parking brake accumulator to the pressure shown on the placard (View C), adjacent to the charging valve.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-15-04
 ALL  ú ú 01 Page 304 ú Jun 20/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL
　
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 SERVICING 1(62)