S 424-025
(1)
Hold the valve assembly on the quadrant support assembly.
S 424-057
(2)
Install the bolts (33) with washers (34) and lock nuts (35).
S 434-026
(3)
Install the lever (8 left, 7 right) on the shaft of the valve assembly:
NOTE: The lever on the right valve assembly and the lever on the
____ left valve assembly are different. Make sure that you install the correct lever.
(a)
If you removed the lever, connect it to the pushrod: 1) Hold the lever on the pushrod. 2) Install the bolt (3), bushing (4), washer (5) and nut (6).
(b)
Install the lockbolt (9), washer (10) and nut (11) on the lever.
S 094-028
(4)
Remove the caps on the valve assembly and the mating hydraulic lines.
S 434-029
(5)
Connect the hydraulic lines to the valve assembly (7 locations).
S 214-030
(6)
Make sure rigging pin B3 (left) or B4 (right) can move freely through these holes at the same time:
(a)
The hole in the quadrant support assembly
(b)
The hole in the control quadrant.
S 824-031
(7)
If you can not move the rig pin freely, make sure the brake metering valve has returned all the way to the off position, and adjust the brake cable system (AMM 32-41-00/501).
H.
Do a Test of the Brake Metering Valve Assembly
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-053
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.
(1)
Pressurize hydraulic system No. 4 (AMM 29-11-00/201).
S 784-063
(2)
Make sure that the pressure indication for hydraulic system No. 4 on the lower EICAS display shows 2900 - 3150 psi.
S 784-064
(3)
Make sure that the HYD BRAKE PRESS gage on the P1-4 panel indicates 2900 - 3150 psig.
S 874-065
(4)
Push the brake pedals fully six times to bleed any air that may have entered the brake system.
S 864-066
(5)
Push the captain's brake pedals fully and hold in this position.
NOTE: The parking brake may be set to avoid leg fatigue.
____
S 794-067
(6)
Make sure there is no leakage from the brake metering valve or fittings.
S 864-068
(7)
Examine each brake's wear indicator to make sure that all the brakes are engaged.
S 864-069
(8)
Release the brake pedals (or parking brake).
S 864-070
(9)
Examine each brake's wear indicator to make sure that all the brakes have released.
S 484-071
(10)
Insert rig pins 3 and 4 to make sure that the valves and cable system have returned to neutral.
(11)
Remove the pressure from hydraulic system No. 4 (AMM 29-11-00/201).
S 864-072
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-074
(12)
Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
S 784-075
(13)
Make sure the pressure indication for hydraulic system No. 1 on the lower EICAS display shows 2900 - 3150 psi.
S 874-077
(14)
Push the brake pedals fully six times to bleed any air that may have entered the brake system.
S 864-078 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 6(61)
