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C.  Chock wheels and release parking brake.
D.  Operate brakes several times to depressurize brake hydraulic system.
E.  Depressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0, Maintenance Practices).
F.  Remove electrical connector (Fig. 401).
G.  Disconnect hydraulic lines and cap off.
H.  Support valve and remove mounting bolts; then remove valve.
3.  Install Antiskid Valve
A.  Position valve, install and lockwire bolts (Fig. 401).
B.  Connect hydraulic lines.
C.  Install electrical connector.
D.  Pressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0).
E.  Pressurize hydraulic accumulators (Ref Chapter 12, Gaseous System Servicing).
F.  Set parking brakes and check fittings for leaks.
G.  Close circuit breakers.
508 
Feb 20/93  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  32-42-31 Page 401 

Antiskid Valve Installation  500 
32-42-31Page 402   Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Nov 15/79 

H.  Check operation of applicable valve.
(1)  
Pressurize hydraulic systems A and B (Ref 29-11-0 and 29-12-0, Maintenance Practices).

(2)  
Provide electrical power to antiskid system.

(3)  
Close all landing gear circuit breakers on P6 panel.

(4)  
Ensure wheel shocks are in place.

(5)  
Release parking brake.

(6)  
Set inboard and outboard antiskid switches on pilot's panel to OFF position. Ensure ANTISKID INOP lights are on.

(7)  
Set both inboard and outboard antiskid switches to ON position. Ensure ANTISKID INOP lights go off.

(8)  
Set parking brake. Ensure ANTISKID INOP lights go off.

NOTE:  The ANTISKID INOP lights may come on momentarily when parking brake valve opens or closes.

(9)  
Release parking brake. Ensure ANTISKID INOP lights remain off.

NOTE:  The ANTISKID INOP lights may come on momentarily when parking brake valve opens or closes.

(10)
Pull inboard antiskid circuit breaker. Ensure inboard ANTISKID INOP light comes on.

(11)
Push inboard antiskid circuit breaker in. Ensure inboard ANTISKID INOP light goes off.

(12)
Pull outboard antiskid circuit breaker. Ensure outboard ANTISKID INOP light comes on.

(13)
Push outboard antiskid circuit breaker in. Ensure outboard ANTISKID INOP light goes off.

(14)
Test Left Outboard Antiskid Control Valve

(a)  
Disconnect electrical connector D926 from left outboard antiskid control valve. Ensure outboard ANTISKID INOP light on pilot's panel and LO light on antiskid control shield come on.

(b)  
Place COMPONENT TEST switch on antiskid control shield to VALVE position. Ensure outboard ANTISKID INOP light and LO light go off. Release COMPONENT TEST switch. Ensure outboard ANTISKID INOP light and LO light come on.

(c)  
Connect electrical connector D926 to valve. Ensure outboard ANTISKID INOP light and LO light go off.

(d)  
Ensure parking brake is released and disconnect electrical connector D928 from shutoff valve. Ensure inboard and outboard ANTISKID INOP lights come on.

(e)  
Set parking brake and place SYSTEM TEST switch on antiskid control shield to RIGHT position. Ensure left inboard and left outboard brakes release and right inboard and right outboard brakes remain applied.

(f)  
Release SYSTEM TEST switch. Ensure all brakes release momentarily and then apply.

(g)  
Release parking brake and connect electrical connector D928 to shutoff valve. Ensure inboard and outboard ANTISKID INOP lights go off.

 

(15)
Test Left Inboard Antiskid Control Valve

(a)  
Disconnect electrical connector D924 from left inboard antiskid control valve. Ensure inboard ANTISKID INOP light on pilot's panel and LI light on antiskid control shield come on.

(b)  
Place COMPONENT TEST switch on antiskid control shield to VALVE position. Ensure inboard ANTISKID INOP light and LI light go off. Release COMPONENT TEST switch. Ensure inboard ANTISKID INOP light and LI light come on.

(c)  
Connect electrical connector D924 to valve. Ensure inboard ANTISKID INOP light and LO light go off.

(d)  
Ensure parking brake is released and disconnect electrical connector D928 from shutoff valve. Ensure inboard and outboard ANTISKID INOP lights come on.

(e)  
Set parking brake and place SYSTEM TEST switch on antiskid control shield to RIGHT position. Ensure left inboard and left outboard brakes release and right inboard and right outboard brakes remain applied.
　
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