D. Procedure
S 862-002
(1) Make sure the reservoir depressurization (vent) valve for each system reservoir is in the closed (non-vented) position.
NOTE: The two hydraulic reservoirs are pressurized at the same
____ time when the two depressurization valves are closed.
S 492-023
CAUTION:_______DO NOT USE MORE THAN 70 PSI PRESSURE. IF YOU USE TOO MUCH PRESSURE, DAMAGE TO THE EQUIPMENT CAN OCCUR.
(2) Connect the air source to the valve for manual air pressurization.
NOTE: The valve is on the reservoir pressurization module.
____
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A 737-300/400/500MAINTENANCE MANUAL
DEPRESSURIZATION
DEPRESSURIZATION VALVE FOR THE
VALVE FOR THE SYSTEM B RESERVOIR
SYSTEM A RESERVOIR RESERVOIR
SEE B VALVE
SEE BPRESSURIZATION SUPPORT
MODULE
TUBING ASSEMBLY SEE A
(2 LOCATIONS) TO THE SYSTEM B RESERVOIR
SEE D TO THE SYSTEM A RESERVOIR
FORWARD WHEELWELL BULKHEAD
CHECK VALVE
VALVE FOR PNEUMATIC (2 LOCATIONS)
MANUAL AIR SUPPLY LINE
PRESSURIZATION
RESERVOIR
SEE C
PRESSURIZATION MODULE
INBD FWD
RESERVOIR PRESSURIZATION MODULE
A
PUSH TO RELEASE THE PRESSURE
DEPRESSURIZATION (VENT) VALVE
(2 LOCATIONS)
B
Reservoir Pressurization Module
Figure 201 (Sheet 1)
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A
737-300/400/500
MAINTENANCE MANUAL
VALVE
CAP
VALVE FOR MANUAL AIR PRESSURIZATION C
FORWARD WHEELWELL
CHECK
BULKHEAD
VALVE
1
VALVE ASSEMBLY
TUBING ASSEMBLY
(2 LOCATIONS)
SWIVEL ELBOW
TEE VALVE
TEE RESERVOIR PRESSURIZATION FWD MODULE
VENT CAP
INBD
TUBING ASSEMBLY
1 THE CHECK VALVE IS INSTALLED IN THE TEE VALVE ASSEMBLY
D
Reservoir Pressurization Module Figure 201 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
S 862-009
(3)
Turn the nut on the valve body to pressurize the reservoir.
S 862-010
(4)
Adjust the pressure of the air supply to pressurize the reservoir to 46 |1 psi.
S 862-011
(5)
Close the valve for manual air pressurization.
S 212-021
(6)
Make sure the pressure in the reservoir stays stable.
NOTE: The air pressure lines between the pressurization module
____ and the reservoirs contain vent orifices. These orifices bleed the air pressure out of the lines after the air source is removed. The check valves in the depressurization valves hold air pressure in each reservoir.
S 092-024
(7) Disconnect the air source from the valve for manual air pressurization.
TASK 29-09-00-862-013
3. Release The Pressure From The Hydraulic Reservoirs
__________________________________________________
A. Special Tools and Equipment
(1) Lock for the Reservoir Depressurization Valve - B29002-5
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