E.
Alternate Brake Selector Valve Operation Test (A Hydraulic System).

 (1)  
Remove the pressure from the B system hydraulics.

 S 724-022
 S 844-024
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A 737-300/400/500MAINTENANCE MANUAL
 (2)  S 724-042During the steps that follow, make sure that the BRAKE PRESS indicator gage on the P3-1 panel shows 3000 |100 psi and stays constant during the brake operations.
 (3)  S 724-025Push the brake pedals many times to apply and release the brakes.
 (4)  S 724-026Make sure that the brake stacks move to show that the brakes operate correctly.
 (5)  S 724-027Remove the connector from one of the alternate antiskid valves.
 (6)  S 724-038Make sure that the ANTISKID INOP light on the P2 panel comes on.
 (7)  S 724-028Attach the connector to the alternate antiskid valve.
 (8)  S 794-030After 5 to 10 minutes, do a check for leaks.
 (9)  S 844-031Remove the hydraulic power if it is not necessary (AMM 29-15-00/201).
 S 844-032

 (10)
 Remove the electrical power if it is not necessary (AMM 24-22-00/201).

 S 844-033

 (11)
 Remove the wheel chocks if it is not necessary.

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A
737-300/400/500MAINTENANCE MANUAL
OVERHEAD
FLOW SEE A FLOW
AUTOBRAKE

FUSE FUSE
CONTROL
MODULE

ACCUMULATOR ALT BRAKE
ISOLATION SELECTOR VALVE
VALVE
ANTISKID

ANTISKID
BRAKE METERING
SHUTTLE

SHUTTLE
VALVE ASSY LEFT VALVES
VALVES
(2 PLACES) ALTERNATE RIGHT
ANTISKID LEFTPARKING BRAKEALTERNATE CONTROL ANTISKIDSHUTOFF VALVEANTISKID VALVECONTROLOUTBDCONTROL BRAKE AUTOBRAKE VALVES
VALVE  INBD
FLOW SHUTTLE
FUSES VALVES
BRAKE INBD
RIGHT ANTISKID
FLOW OUTBD
CONTROL VALVES  FUSES
SERVICING GAGE
ACCUMULATOR
WHEEL WELL BRAKE PRESS
AFT BULKHEAD TRANSMITTER BL 0
STA 727
VIEW LOOKING AFT
HYDRAULIC LINE
ALTERNATE SOURCE SELECT VALVE
SWITCH
HYDRAULIC LINES
HYDRAULIC LINE
FWD
A
Alternate Brake Selector Valve Figure 401
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A 737-300/400/500MAINTENANCE MANUAL
 BRAKE SHUTTLE VALVES - REMOVAL/INSTALLATION
___________________________________________
 1.  General
_______
 A.  Brake shuttle valves are located at the right and the left sides of the main gear wheel well. The procedure that follows covers the removal and installation of the brake shuttle valves.
 TASK 32-41-95-004-041
 2.  Remove the Brake Shuttle Valve (Fig. 401)
______________________________
 A.  References
 (1)  
29-15-00/201, Hydraulic Systems

 (2)  
32-00-01/201, Ground Locks

 B.  
Access

 (1)  
Location Zones
 101 Left Control Cabin
 102 Right Control Cabin
 216 Left Main Wheel Well
 217 Right Main Wheel Well
 310 Left Main Landing Gear
 410 Right Main Landing Gear

 C.  
Procedure

 S 844-002
 (1)  
Make sure that the downlocks of the landing gear are installed (Ref 32-00-01/201).

 S 844-003

 (2)  
Make sure that you remove the pressure from the A and B hydraulic systems (Ref 29-15-00/201).
　
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