(7)  
Disconnect the hydraulic lines and seal them with a cap.

 (8)
Remove the unions from the valve ports and discard the O-rings.

 S 024-007
 S 034-008
 S 024-009
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 32-42-31
 ALL  ú ú 01 Page 401 ú Nov 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 024-010
 (9)  Hold the valve, remove the four mounting bolts and remove the valve.
 TASK 32-42-31-404-011
 3. Antiskid Valve Installation (Fig. 401 or 402)
___________________________
 A. Consumable Materials
 (1)  
D00274 Lubricant - Hydraulic Fluid

 B.
References

 (1)  
24-22-00/201, Manual Control

 (2)  
29-15-00/201, Hydraulic System

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

 C.
Access

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

 D.
Install Antiskid Valve

 S 424-012
 (1)  
Put the valve in its position and install it.

 S 434-013

 (2)
Install the bolts which hold the antiskid valve to the airplane.

 S 644-014

 (3)  
Lightly lubricate the O-rings and the unions with hydraulic fluid.

 S 424-015

 (4)
Install the unions and the new O-rings in the valve ports.

 S 424-073

 (5)  
Install the check valve in the return port of the alternate antiskid valve.

 (6)  
Connect the hydraulic lines.

 (7)  
Install the electrical connector.

 (8)
Pressurize the hydraulic systems A and B (AMM 29-15-00/201).

 S 434-016
 S 424-017
 S 844-018
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 32-42-31
 ALL  ú ú 03 Page 402 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 844-019
 (9)  
If you replaced the alternate antiskid valve, remove the pressure from hydraulic system B to move brake pressure to the alternate system (AMM 29-15-00/201).

 S 874-020

 (10)
 Bleed the hydraulic brake system (AMM 32-41-00/201).

 S 794-021

 (11)
 Set the parking brakes and do a check the fittings for leaks.

 S 844-022

 (12)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
OUTBD ANTISKID

 (b)  
INBD ANTISKID

 (c)  
ANTISKID FAIL WARN & PARKING BK

 E.
Do a Check on the Operation of the Valve

 S 844-023
 (1)  
Pressurize the hydraulic systems A and B (AMM 29-15-00/201).

 S 844-024

 (2)  
Make sure the wheel chocks are in their position.

 S 844-025

 (3)  
Release the parking brake.

 S 844-026

 (4)  
Open the ANTISKID FAIL WARN & PARK BRAKE circuit breaker on the P6 panel and attach a DO-NOT-CLOSE tag.

 S 034-027

 (5)  
Disconnect the connector, D928, from the parking brake valve in the wheel well of the main landing gear.

 S 844-028

 (6)  
Close the ANTISKID FAIL WARN & PARK BRAKE circuit breaker on the P6 panel and remove the DO-NOT-CLOSE tags.

 (7)  
Set the parking brake.

 (8)
Supply electrical power to the antiskid system (AMM 24-22-00/201).

 S 844-029
 S 844-030
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