F86383
Hydraulic Reservoir Pressurization Air Pressure Filter Servicing 500
29-09-321 Figure 301 Oct 20/85
Page 302
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
HYDRAULIC RESERVOIR PRESSURIZATION VENT FILTER - UNIT SERVICING
1. Replace Vent Filter Element
A. Disconnect tubing from filter (See Fig. 301).
B. Unscrew filter case from filter head.
C. Remove and discard filter element.
D. Clean filter case, filter head and spring.
E. Install new O-ring in filter head.
F. Reinstall spring and new filter element in filter case and screw case into filter head.
G. Connect tubing to filter.
500
Feb 15/68 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-09-331 Page 301
F86389
Hydraulic Reservoir Pressurization Vent Filter Servicing 500
29-09-331 Figure 301 Aug 15/67
Page 302
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
HYDRAULIC RESERVOIR PRESSURIZATION AIR PRESSURE REGULATOR -REMOVAL/INSTALLATION
1. General
A. A container may be necessary to catch fluid from disconnected lines. 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 Air Pressure Regulator
A. Depressurize hydraulic reservoirs. Refer to 29-09-300, Hydraulic Reservoir Pressurization System - MP.
B. Disconnect lines from regulator and cap lines (Fig. 401).
C. On airplanes with check valve, remove check valve from IN port, if required.
D. Remove vent filter from regulator.
E. Remove regulator mounting bolts and remove regulator.
4. Install Air Pressure Regulator
A. On airplanes without check valve in IN port, install O-rings and unions in IN and RES ports. Lubricate with assembly lube or hydraulic fluid.
B. On airplanes with check valve, install O-ring and union in RES port. Install O-ring and check valve so that flow direction arrow points toward IN (inlet) port. Lubricate with assembly lube or hydraulic fluid.
NOTE: Ensure that check valve is installed with flow direction arrow pointing toward IN port or system will not hold pressure.
C. Position regulator in mounting position and install mounting bolts.
CAUTION: CHECK THAT REGULATOR IS NOT INSTALLED BACKWARD. "IN" PORT SHOULD BE FACING LEFT SIDE OF AIRPLANE AND "RES" PORT SHOULD BE FACING RIGHT SIDE OF AIRPLANE. IF INSTALLED BACKWARD, UNREGULATED AIR PRESSURE WILL DAMAGE RESERVOIR.
D. Install vent filter in VENT port.
E. Connect lines to pressure regulator.
F. Pressurize hydraulic reservoirs and check connections for leaks. Refer to 29-09-300.
567
Feb 20/93 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 29-09-341 Page 401
F86572
Hydraulic Reservoir Pressurization Air Pressure Regulator Installation 504
29-09-341 Figure 401 Oct 20/90
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
HYDRAULIC RESERVOIR PRESSURIZATION RELIEF VALVE - REMOVAL/INSTALLATION
1. General
A. A container may be necessary to catch fluid when removing the relief valve from the manifold. 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 Relief Valve
A. Depressurize hydraulic reservoirs. Refer to 29-09-300, Hydraulic Reservoir Pressurization System - Maintenance Practices.
B. Disconnect vent line from relief valve (Fig. 401).
C. Remove relief valve from manifold.
4. Install Relief Valve (Fig. 401)
A. Install O-rings and unions in relief valve. Lubricate with assembly lube or hydraulic fluid.
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