(10)
 Install the cap on the fill connection.

 S 863-011

 (11)
 Add pressure to the potable water system, if it is necessary (AMM 38-41-00/201).

 S 093-008
 S 683-009
 S 413-010
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737-300/400/500MAINTENANCE MANUAL
 S 413-012
 (12) Close the access panel for the potable water service panel.
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737-300/400/500MAINTENANCE MANUAL
 HYDRAULIC ACCUMULATOR - SERVICING
_________________________________
 1. General
 A. This procedure fills the hydraulic accumulator.
 TASK 12-15-11-003-001
 2.  Brake Hydraulic Accumulator Servicing_____________________________________
 A. Standard Tools and Equipment
 (1)  
Charging Truck - Nitrogen

 (2)  
Chocks - Main Gear Wheels

 B. References
 (1)  AMM 29-15-00/201, Hydraulic System
 C. Access
 (1)  Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right
 216 Left Main Wheel Well
 310 Left Main Wheel Well
 410 Right Main Wheel Well

 D. Brake Hydraulic Accumulator Servicing
 S 493-002
 (1)  
Install chocks on the wheels of the main landing gear and release the parking brake.

 S 843-003

 (2)  
Push the captain's or the first officer's brake pedals approximately eight times to remove the pressure from the brake system.

 S 613-004
 WARNING:_______DO NOT LOOSEN THE VALVE BODY. THE INNER PRESSURES CAN BLOW THE VALVE OUT, WHICH CAN CAUSE INJURIES TO PERSONS.
 (3)  Fill the hydraulic accumulator with dry nitrogen (refer to the instructions on the aluminum foil marker near the pressure gage in the right main wheel well).
 (a)  Remove the valve cap.
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A 737-300/400/500MAINTENANCE MANUAL 
TRANSMITTER BRAKE PRESSURE 
CHARGING VALVE 
GAGE PRESSURE  ASEE DECAL SERVICING 
RELIEF PRESSURE VALLUE  ACCUMULATOR BRAKE  FWD  INBD 
WITH SYSTEM DEPRESSURIZED HYDRAULIC ACCUMULATOR CHART BELOW - | 50 PSI CHARGING INSTRUCTIONS-1400 TO APPLICABLE PRESSURE PER CHARGE WITH DRY NITROGEN 

PRESSURE-
PSI GAGE

1200 1000
800
600
-50 -25 0 +25 +50 +75
AMBIENT TEMP - ` CENTIGRADE

BACN12M1UF
A
Brake Hydraulic Accumulator Servicing
Figure 301

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A 737-300/400/500MAINTENANCE MANUAL
 (b) (c) (d)  Loosen the outer hex-swivel nut of the valve and fill to the specified pressure.Tighten the outer hex-swivel nut of the valve.Disconnect the pressure source and replace the cap.
 (4)  S 843-005Pressurize the applicable hydraulic system (AMM 29-15-00/201).
 NOTE:____ The pressure gage of the hydraulic system should show approximately 3000 psi.
 (5)  S 843-006After 5 to 10 minutes remove the pressure from the applicable hydraulic system (AMM 29-15-00/201).
　
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