S 212-030

 (7)  
Make sure the HYD BRAKE PESS gage, on the P1 panel, shows
 3000 |200 psi.

 S 862-031

 (8)  
Bleed the brake hydraulic line from the antiskid valve to the brake to remove air (AMM 32-41-00/201).

 S 862-033

 (9)  
Push on the brake pedals slowly and fully five times.

 (a)  
Look at the brake supplied through the shuttle valve that was installed.

 (b)  
Look for brake piston movement to make sure the brake operates correctly.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 862-032
 (10)
 Remove the pressure from hydraulic system No. 4 (AMM/29-11-00/201).

 S 862-034

 (11)
 Push on the brake pedals slowly and fully five times.

 (a)  
Look at the brake supplied through the shuttle valve that was installed.

 (b)  
Look for brake piston movement to make sure the brake operates correctly.

 S 862-035
 (12) Remove the pressure from hydraulic system No. 1 (AMM 29-11-00/201).
 S 862-036
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (13)
 Pressurize hydraulic system No. 4 (AMM 29-11-00/201).

 S 862-037

 (14)
 Set the parking brake.

 S 212-038

 (15)
 After five minutes, look for leaks at the shuttle valve.

 S 862-039

 (16)
 Remove the pressure from hydraulic system No. 4 (AMM 29-11-00/201).

 F.
Install the Filter (Fig. 201)

 S 642-013
 (1)  
Lubricate new O-rings with clean hydraulic fluid.

 (2)  
Install O-rings and retainers on the filter valve.

 S 432-040
 S 412-041
 CAUTION: BE CAREFUL TO KEEP CONTAMINATION OUT OF THE SHUTTLE VALVE
_______ ASSEMBLY. IT CAN CAUSE A MALFUNCTION OF THE SHUTTLE VALVE.
 (3)  
Install the filter into the shuttle valve assembly.

 (4)  
Tighten and install lockwire.

 S 492-042
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú 01 Page 206 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 862-043
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (5)  
Pressurize hydraulic system No. 1 and 4 (AMM 29-11-00/201).

 S 212-044

 (6)  
Make sure the HYD BRAKE PESS gage, on the P1 panel, shows
 3000 |200 psi.

 S 862-045

 (7)  
Bleed the brake hydraulic line from the antiskid valve to the brake to remove air (AMM 32-41-00/201).

 S 732-051

 (8)  
Push on the brake pedals slowly and fully five times.

 (a)  
Look at the brake supplied through the shuttle valve filter that was installed.

 (b)  
Look for brake piston movement to make sure the brake operates correctly.

 S 862-046
 (9)  
Set the parking brake.

 S 212-047

 (10)
 After five minutes, look for leaks at the shuttle valve filter.

 S 862-048

 (11)
 Remove the pressure from hydraulic system No. 4 (AMM 29-11-00/201).

 G.
Put the Airplane Back to Its Usual Condition

 S 092-016
　
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