S 795-091
(24)
Apply MIL-L-25567C Type I liquid leak detector to all fittings and valves on the reservoir to the exterior of the reservior depressurization and to the lines located between the reservoir pressurization module and the reservoir depressurization valves (2 locations).
S 795-102
(25)
Bubbles of the liquid leak detector will indicate leaking components.
S 035-103
(26)
Replace leaking parts.
S 015-107
(27)
Depressurize reservoirs for hydraulic systems A and B.
S 025-108
(28)
Remove (2) BACC14AD04D caps and replace them with clean vents.
S 715-109
(29)
AIRPLANES WITH RESEVOIR BALANCE LINES; Do these steps to check the check valve in the tee valve assembly.
(a)
Adjust the pressure regulator for the nigtron source until reservoir pressure is 50 psi.
(b)
Close the shut off valve for the nigtron source.
(c)
If the gauge pressure decreases more than 5 psi in 5 minuits, replace the check valve in the tee valve assembly.
S 715-110
(30) AIRPLANES WITHOUT RESEVOIR BALANCE LINES; Do these steps to check the check valve between the reservoir pressurization module and the reservoir depressurization valve.
(a) Adjust the pressure regulator for the nigtron source until reservoir pressure is 50 psi.
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A
737-300/400/500MAINTENANCE MANUAL
(b)
Close the shut off valve for the nigtron source.
(c)
If the gauge pressure decreases more than 5 psi in 5 minuits, replace the check valve between the reservoir pressurization module and the reservoir depression valve.
S 435-088
(31) Reconnect both air presssure supply lines, removed in step (4), back to the reservoir pressurization module inlet ports.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
HYDRAULIC RESERVOIR PRESSURIZATION MODULE - MAINTENANCE PRACTICES
_________________________________________________________________
1. General_______
A. This procedure gives you the instructions to remove and install the hydraulic reservoir pressurization module (referred to as the pressurization module). It also gives you the instructions to remove and install the filter that is in the module.
TASK 29-09-11-842-001
2. Prepare for the Maintenance of the Pressurization Module________________________________________________________
A. References
(1)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
(2)
AMM 36-05-00/201, Pneumatic System
(3)
AMM 52-49-31/201, Tire Burst Protector Screen Door
B. Access
(1) Location Zones
214 Right Air Conditioning Equipment Bay
217 Right Main Wheel Well
C. Procedure
S 862-002
WARNING:_______REMOVE THE PRESSURE FROM THE PNEUMATIC MANIFOLD. IF YOU DO NOT REMOVE THE PRESSURE, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR WHEN YOU DISCONNECT THE PRESSURIZATION MODULE.
(1)
Put the ENG 1, ENG 2, and APU BLEED switches on the P5 panel in the OFF position (AMM 36-05-00/201).
S 842-003
(2)
Attach a DO-NOT-USE tag to the connector for the ground pneumatic air.
(3)
Open the tire burst protector screen door (AMM 52-49-31/201).
S 862-006
(4)
Release the pressure from the system A and B hydraulic reservoirs (AMM 29-09-00/201).
S 012-005
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