(2)
Unscrew filter case and remove case and filter element (Fig. 301).
(3)
Thoroughly clean filter bowl. Replace paper element.
C. Install Pressure Filter Element
(1)
Insert O-ring between backup rings in groove in modular housing (Fig. 301).
(2)
Insert O-ring and backup ring in groove at top of element.
(3)
Partially prefill filter bowl with hydraulic fluid. Place element in filter bowl and lightly lubricate filter bowl threads and O-rings with assembly lube or hydraulic fluid.
CAUTION: DURING INSTALLATION, IT IS IMPERATIVE THAT EXTREME CARE BE TAKEN TO PREVENT IMPURITIES FROM ENTERING THE SYSTEM. ALL CONNECTIONS MUST BE MADE TIGHT TO PREVENT FLUID AND AIR LEAKAGE.
(4)
Screw filter bowl into modular housing and apply a torque to the filter bowl of 200 to 275 pound-inches and secure with lockwire.
(5)
Pressurize hydraulic system B (Ref 29-12-0 MP).
(6)
Check filter for leakage.
500
Oct 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-12-41 Page 301
F87550
System B Hydraulic Pressure Filter Servicing 500
29-12-41 Figure 301 Aug 15/67
Page 302
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
SYSTEM B PRESSURE RELIEF VALVE - REMOVAL/INSTALLATION
1. General
A. The system B pressure relief valve is installed in the system B module unit which is mounted on the forward bulkhead of the right wheel well.
B. A container will be necessary to catch fluid when removing the relief valve. Should any fluid spill on the airplane, the affected area must be decontaminated. Refer to Chapter 12, Cleaning and Washing.
2. Equipment and Material
A. Skydrol Assembly Lube - MCS 352 or Fire Resistant Hydraulic Fluid - BMS\3-11
3. Remove System B Pressure Relief Valve
A. Depressurize hydraulic system B. Refer to 29-12-0, Hydraulic System B -\MP.
B. Depressurize hydraulic reservoirs. Refer to 29-09-300, Hydraulic Reservoir Pressurization System - MP.
C. Unscrew pressure relief valve (Fig. 401) and remove from module unit.
D. Install protective plug in open port of module unit.
4. Install System B Pressure Relief Valve
A. Apply assembly lube or hydraulic fluid to all 0-rings and to threads of relief valve to facilitate installation.
B. Install O-ring between backup rings in each relief valve groove (Fig.\401).
C. Remove protective plug and screw relief valve into module housing. Apply 200 to 275 inch-pounds of torque to relief valve and secure with lockwire.
D. Pressurize hydraulic system B. Refer to 29-12-0, Hydraulic System B - MP.
E. Check relief valve for leaks.
500
Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-12-51 Page 401
F87557
System B Pressure Relief Valve Installation 500
29-12-51 Figure 401 Nov 15/67
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
SYSTEM B CHECK VALVES - REMOVAL/INSTALLATION
1. General
A. The system B check valves are installed in the system B module unit which is mounted on the forward bulkhead in the right wheel well.
B. A container will be necessary to catch hydraulic fluid when removing either of the check valves from the module unit. Should any fluid spil1 on the airplane, the affected area must be decontaminated. Refer to Chapter 12, Cleaning and Washing.
2. Equipment and Material
A. Skydrol Assembly Lube - MCS 352 or Fire Resistant Hydraulic Fluid - BMS\3-11
3. Remove System B Check Valve
A. Depressurize hydraulic system B. Refer to Hydraulic System B - MP.
B. Depressurize hydraulic reservoirs. Refer to 29-09-300, Hydraulic Reservoir Pressurization System - MP.
C. Unscrew and remove check valve from module unit.
D. Install protective plug in open port of module unit.
4. Install System B Check Valve
A. Apply assembly lube or hydraulic fluid to all 0-rings and to the threads of check valve to facilitate installation.
B. Install O-ring with backup rings in each groove of check valve (Fig. 401).
C. Remove protective plug and screw check valve into module housing. Apply 200 to 250 inch-pounds of torque to check valve.
D. Pressurize hydraulic system B. Refer to 29-12-0, Hydraulic System B -\MP.
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