S 434-020

 (2)  
Install the new O-rings on the reducers.

 S 414-022

 (3)  
Install the reducers on the valve.

 S 124-023

 (4)  
Where the valve and bracket have an overlap, lightly use an abrasive material on the metal.

 (a)  
Use a solvent and a cloth to clean and dry the surfaces.

 (b)  
Apply approximately a 1/16 inch thick layer of sealant to the two surfaces where they have an overlap.

 S 434-024
 (5)
Install the valve on the mounting bracket with the three bolts.

 S 824-025

 (6)  
Make sure the maximum resistance between the valve body and the attach bracket is 0.0025 ohm.

 S 844-026

 (7)  
Make sure the valve is in the open position (position 1).

 S 434-027

 (8)  
Connect the hydraulic lines to the valve.

 (9)  
Install the electrical connector to the valve connector.

 S 864-029

 (10)
 Pressurize the right and left hydraulic system and reservoirs (AMM 29-11-00/201).

 S 434-028
 

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 S 864-030
 (11)
 Remove the DO-NOT-CLOSE tag and close this circuit breaker on the main power distribution panel, P6:

 (a)  
6F4, LANDING GEAR PARKING BRAKE VLV

 S 714-031
 (12)
 Do a test of the parking brake valve operation.

 (a)  
Fully push and release the brake pedals a minimum of four times.

 (b)  
After 5 to 10 minutes, make sure there are no leaks.

 S 844-041
 CAUTION: DO NOT TWIST THE HANDLE OF THE PARKING BRAKE WHEN YOU SET THE
_______ BRAKE. IF THE HANDLE IS TWISTED, IT CAN CAUSE DAMAGE TO THE HANDLE LINKAGE.
 (13)
 To set the parking brakes, do the steps that follow:

 (a)  
Push the two brake pedals down fully.

 (b)  
Pull the handle for the parking brake.

 (c)  
Release the two brake pedals.

 (d)  
Make sure the PARK BRAKE indicator light on the quadrant control stand panel, P10, is on.

 S 844-042
 (14) Look at the parking brake valve to make sure the valve lever is in the closed position (position 2).
 S 944-033
 CAUTION:_______DO NOT MOVE THE HANDLE FOR THE PARKING BRAKE. IF YOU TWIST THE HANDLE, YOU CAN CAUSE DAMAGE TO THE HANDLE LINKAGE.
 (15) Push the two brake pedals fully down then release them to release the parking brake.
 

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 S 844-034
 (16)
 Make sure the parking brake valve has moved to the open position (position 1).

 S 844-035

 (17)
 Make sure the PARK BRAKE indicator light on the quadrant control stand panel, P10, is off.

 F.
Put the Airplane Back to Its Usual Condition

 S 864-037
 (1)  
Remove the pressure from the right and left hydraulic systems and reservoirs (AMM 29-11-00/201).

 S 844-038

 (2)  
Set the parking brakes.

 S 094-043
 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO REMOVE THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (3)  
Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).

 (4)
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 864-039
 

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 PARKING BRAKE ACCUMULATOR - REMOVAL/INSTALLATION
________________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task removes the accumulator for the parking brake. The second task installs the accumulator for the parking brake.
 TASK 32-44-05-004-001
 2.  Remove the Parking Brake Accumulator (Fig. 401)
____________________________________
 A.  References
 (1)  
AMM 12-15-04/301, Parking Brake Accumulator

 (2)  
　
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