A. Skydrol Assembly Lube - MCS 352 or Fire Resistant Hydraulic Fluid - BMS\3-11
3. Replace Pressure Filter Element
A. Remove Pressure Filter Element
(1)
Open standby pump circuit breakers on P6-11 and P6-12 panels.
(2)
Unscrew filter bowl and remove filter element (Fig. 301).
(3)
Discard filter element and clean filter bowl.
B. Install Pressure Filter Element
(1)
Install O-ring and backup ring in groove of top of filter element (Fig. 301).
(2)
Install backup ring, O-ring and backup ring in groove in modular housing.
(3)
Lightly lubricate filter bowl threads and O-rings with assembly lube or hydraulic fluid.
(4)
Partially prefill filter bowl with hydraulic fluid. Place element in filter bowl and screw bowl onto modular housing.
(5)
Apply a torque of 50 to 200 pound-inches to filter bowl and secure with lockwire.
(6)
Pressurize standby system and check filter for leaks.
(a)
Connect electrical power to airplane.
(b)
Close standby pump circuit breakers on P6-11 and P6-12 panels.
WARNING: PERSONNEL STAND CLEAR OF RUDDER AND LEADING EDGE DEVICES.
(c)
On overhead panel, position system A flight control switch to STBY RUD and cycle rudder.
(d)
Place switch in OFF position and remove electrical power.
(7)
Service hydraulic reservoirs. Refer to Chapter 12, Hydraulic Fluid Servicing.
500
Oct 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-21-51 Page 301
F87787
Standby Hydraulic Pressure Filter Servicing 500
29-21-51 Figure 301 Feb 01/75
Page 302
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
STANDBY HYDRAULIC SYSTEM PRESSURE RELIEF VALVE - REMOVAL/INSTALLATION
1. General
A. The standby system relief valve is installed in the standby module housing which is mounted on the center of the aft bulkhead in the wheel well area (Fig. 401).
B. A container will be necessary to catch hydraulic fluid when removing the relief valve from the module unit. Should fluid spill on the airplane, the affected area must be decontaminated. Refer to Chapter 12, Cleaning and Washing.
2. Equipment and Materials
A. Skydrol Assembly Lube - MCS 352 or Fire Resistant Hydraulic Fluid - BMS 3-11
3. Remove Standby System Pressure Relief Valve
A. Depressurize hydraulic reservoir system. Refer to 29-09-300, Hydraulic Reservoir
Pressurization System - MP.
B. Disconnect standby system motor-driven pump electrical connector.
C. Unscrew and remove relief valve from module unit (Fig. 401).
D. Install protective plug in open port of module unit.
4. Install Standby System Pressure Relief Valve
A. Install O-rings with backup rings in each groove of relief valve. Apply assembly lube or hydraulic fluid to O-rings and to threads of relief valve (Fig. 401).
B. Remove protective plug and screw relief valve into module housing. Apply 50 to 200 pound-inches of torque to relief valve and install lockwire.
C. Pressurize hydraulic reservoir system (Ref 29-09-300).
D. Connect electrical connector to standby pump electric motor.
E. Pressurize standby hydraulic system and check for leaks.
NOTE: Standby system is pressurized with the standby pump by switching either of the FLIGHT CONTROL switches to STBY RUD (standby rudder) position or by switching the ALTERNATE FLAP switch to ARM position. Switches are located on the P5 forward overhead panel.
500
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-21-61 Page 401
F87794
Standby System Relief Valve Installation 500
29-21-61 Figure 401 Feb 01/75
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
STANDBY HYDRAULIC SYSTEM LOW PRESSURE SWITCH - REMOVAL/INSTALLATION
1. General
A. A container will be necessary to catch fluid from the modular unit. Take necessary precautions to prevent spillage of fluid. Should any fluid spill on the airplane, decontaminate. Refer to Chapter 12, Cleaning and Washing.
2. Equipment and Materials
A. Skydrol Assembly Lube - MCS 352 or Fire Resistant Hydraulic Fluid - BMS 3-11
3. Remove Pressure Switch
A. Depressurize hydraulic reservoir system. Refer to 29-09-300, Hydraulic Reservoir 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737 AMM 飛機維護手冊 液壓 HYDRAULIC POWER(74)
