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A
747-400 MAINTENANCE MANUAL
B. Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 14 | Filter Cap |27-61-05 | 05 | 5 | | | 15 | Filter | | | 20 | | | 16 | Backup Ring | | | 10 | | | 17 | Packing (O-ring) | | | 15 | | | 18 | Backup Ring | | | 25 | | | 19 | Packing (O-ring) | | | 30 | 2......…........…...................................…..........….....….........1
C. References
(1)
AMM 12-12-01/301, Hydraulic Systems
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 29-11-00/201, Main Hydraulic Supply System
D.
Access
(1)
Location Zone
585 Spoiler No. 1
584 Spoiler No. 2
583 Spoiler No. 3
582 Spoiler No. 4
682 Spoiler No. 9
683 Spoiler No. 10
684 Spoiler No. 11
685 Spoiler No. 12
E.
Procedure
S 432-144
(1)
Install the filter:
(a)
Install the new O-rings (17 and 19) and backup rings (16 and 18) on the filter (15) and the filter cap (14). 1) Apply the hydraulic fluid to the O-rings, the backup rings
and the threads of the fittings.
(b)
Install the filter and the cap. 1) Tighten the cap to 60-70 pound-inches (6.78-7.90 Nm).
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747-400 MAINTENANCE MANUAL
2) Install the lockwire on the cap.
S 862-079
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P180, DC Power Distribution Panel
1) 180E6, LATERAL CONT VLV SYS 2
2) 180H23, LATERAL CONT VLV SYS 3
S 862-080
(3)
Put the FLT CONTROL HYD POWER - WING switches for systems No. 2 and No. 3 on the pilots' overhead panel, P5, to the NORM position.
S 862-081
(4)
Do this task: "Hydraulic System Pressurization" (AMM 29-11-00/201).
S 872-082
(5)
Extend and retract the spoiler to bleed the hydraulic system.
S 792-083
(6)
Examine the filter cap for leaks.
F.
Put the Airplane Back to Its Usual Condition
S 862-084
(1)
Put the flap control lever in the UP detent to retract the trailing edge flaps.
S 862-085
(2)
Do this task: "Hydraulic System Depressurization"
(AMM 29-11-00/201).
S 612-086
(3)
Do this task: "Hydraulic Reservoir Servicing" (AMM 12-12-01/301).
S 862-087
(4)
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).
S 862-088
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P7, Overhead Circuit Breaker Panel
1) 7G6, SPEED BRAKE AUTO CONT
(6)
Close the access doors.
S 412-089
TASK 27-61-05-002-090
6. Thermal Relief Valve Removal (Fig. 201)____________________________
A. Special Tools and Equipment
(1)
G27032, No. 1 thru 4, and 9 thru 12, Spoiler Actuator Locking Tool
B.
Standard Tools and Equipment
(1)
Bolt - 5/16-18, at least 3 inches long
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