S 494-019
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)
Install the ground locks in all landing gear (AMM 32-00-01/201).

 (2)  
Put chocks at all of the landing gear wheels.

 (3)  
Release the parking brake.

 (4)  
Remove power from the hydraulic systems A and B (AMM 29-15-00/201).

 S 494-003
 S 864-004
 S 864-005
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A
737-300/400/500MAINTENANCE MANUAL
 S 874-006
 (5)  
Bleed the pressure from the brake accumulator:

 (a)  
Operate the brake pedals until the gage at the brake accumulator shows no change in the pressure.

 NOTE: You will have to operate the brake pedals approximately
____ 12 times to fully release the pressure from the accumulator.
 E. Removal (Fig. 401)
 S 034-008
 (1)  
Disconnect the hydraulic lines from the metering valve.

 (a)  
Put caps on the valve ports.

 (b)  
Put caps on the hydraulic lines.

 S 034-010
 (2)  Remove the brake feel augmentor from the primary metering valve (AMM 32-41-97/401).
 NOTE: It is not necessary to do this step for the removal of the
____
 alternate metering valve.

 S 024-009
 (3)  
Remove the metering valve:

 (a)  
Remove the three bolts which hold the metering valve to the ceiling of the wheel well.

 TASK 32-41-31-424-011
 3. Brake Metering Valve Installation
_________________________________
 A. General
 (1)  You can do this task to install one of the primary metering valves for the left or the right side.
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737-300/400/500MAINTENANCE MANUAL
SEE A
TURNBUCKLES
BRAKE CONTROL CABLES
TURNBUCKLES
ALTERNATE BRAKE METERING VALVE ASSEMBLY
UNIONS
UP MOUNTING BOLTS
BOLT
(3 LOCATIONS)

RIGHT INSTALLATION SHOWN LEFT INSTALLATION SIMILAR
A
Brake Metering Valve InstallationFigure 401
NORMAL BRAKE METERING VALVE ASSEMBLY
BRAKE FEEL AUGMENTOR ASSEMBLY (REF 32-41-97 FOR REMOVAL/ INSTALLATION)
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 B.
C.
D.
E.
A 737-300/400/500MAINTENANCE MANUAL
 (2)  
You can also use this task to install one of the alternate metering

 valves.Consumable Materials

 (1)  
C00038 - Compound, Corrosion Preventive, MIL-C-11796, Class I,

 Class II, & Class IIIReferences

 (1)  
12-12-00/301, Hydraulic Reservoir

 (2)  
29-15-00/201, Hydraulic Systems A, B, and Standby

 (3)  
32-41-00/201, Hydraulic Brake System

 (4)  
32-41-00/501, Hydraulic Brake System

 (5)
32-41-97/401, Brake Feel AugmentorAccess

 (1)  
Location Zone 101 Control Cabin, Left 102 Control Cabin, Right 216 Left Main Wheel Well 217 Right Main Wheel Well

Installation (Fig. 401).
 S 624-013
 (1)  Apply a thin layer of corrosion preventive compound to the threads of the mounting holes for the brake metering valve.
 NOTE: There are three mounting holes on the ceiling of the wheel
　
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