(a)
Put caps on the disconnected hydraulic lines.
S 034-009
(2)
Remove the unions from the ports of the valve.
(a)
Discard the O-rings.
(b)
Discard the backup rings.
S 024-010
(3)
Remove the isolation valve from the mounting plate.
(a)
Remove the three nuts and the washers from the isolation valve.
TASK 32-41-91-424-002
3. Accumulator Isolation Valve Installation
________________________________________
A. Consumable Materials
(1)
B00083 Solvent - Naphtha, TT-N-95, Type I
(2)
D00007 Fluid - Hydraulic, Fire Resistant, BMS 3-11
(3)
D00054 Lubricant - Hydraulic System Fittings, MCS 352
B.
References
(1)
29-15-00/201, Hydraulic Systems A, B, and Standby
C.
Access
(1)
Location Zone
101 Control Cabin, Left
102 Control Cabin, Right
217 Right Main Wheel Well
D.
Installation (Fig. 401)
S 114-024
(1)
Prepare the mounting surfaces for installation of the isolation valve.
(a)
Clean the mounting surface on the isolation valve with the solvent.
(b)
Clean the surface of the mounting bracket with the solvent.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
STA 727
TRANSMITTER BL 0
VIEW LOOKING AFT
Accumulator Isolation Valve Installation
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
(2) S 424-011Install the isolation valve on the mounting bracket. (a) Install the washers. (b) Install the three nuts.
(3) S 644-025Lubricate the valve unions and the new O-rings.
NOTE:____ You can use the lubricant or the hydraulic fluid to lubricate the unions and the O-rings.
(4) S 434-014Install the valve unions on the isolation valve: (a) Remove the plugs from the isolation valve ports. (b) Install the new O-rings and the backup rings on the valve unions. (c) Install the valve unions in the isolation valve ports.
(5) S 434-015Connect the hydraulic lines to the isolation valve. (a) Remove the caps from the hydraulic lines. (b) Attach the hydraulic lines to the valve unions.
(6) S 864-016Supply hydraulic power from system A and system B (Ref 29-15-00/201).
(7) S 874-027Bleed the brake hydraulic system: (a) Fully operate the brake pedals 6 times.
NOTE:____ Wait a minimum of 5 seconds between each operation of the pedals. You must operate the pedals slowly.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 714-029
(8) Do this task: "Isolation Valve Test" (Ref 32-41-91/401).
TASK 32-41-91-714-028
4. Isolation Valve Test
____________________
A. General
(1)
You must do this task after you install the accumulator isolation valve.
B.
References
(1)
29-15-00/201, Hydraulic Systems A, B, and Standby
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