757 AMM 飞机维护手册 液压 CHAPTER 29 - HYDRAULIC POWER 2(191)

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 S 014-002
 (1)  If you will remove the pressure switch (1) on the reservoir in the center hydraulic system, do this step:
 (a)  Open the access panel, 197KL, for the central hydraulic service center (AMM 06-41-00/201).
 S 494-003
 (2)  If you will remove the pressure switch (1) on the reservoir in the left or right hydraulic system, do these steps:
 (a)  Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (b)  Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
 S 864-004
 (3)  Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
 (a)  EICAS (6 locations)

1. PRESSURE SWITCH
2. O-RING
RESERVOIR SEE

HYDRAULIC RESERVOIR (EXAMPLE)

A
Hydraulic Reservoir Pressure Switch Installation Figure 401
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 S 864-005
 (4)  
Remove the pressure from the hydraulic reservoir from which you will remove the pressure switch (1) (AMM 29-11-00/201).

 S 034-006

 (5)
Remove the electrical connector from the pressure switch (1).

 S 024-007

 (6)  
Remove the pressure switch (1) from the reservoir.

 S 034-008

 (7)  
Remove the O-ring (2) from the pressure switch (1).

 S 034-009

 (8)  
Install a cap in the opening of the reservoir.

 TASK 29-35-01-404-010
 3.  Install the Pressure Switch (Fig. 401)___________________________
 A. Consumable Materials
 (1)  D00054 Hydraulic System Lubricant - MCS 352
 B. Parts
 ~....................................................... | MM | | IPC | ............. ....................... | FIG |ITEM | NOMENCLATURE | SUBJECT |FIG |ITEM | ......................................................... | 401 | 1 | Pressure Switch | 29-11-20 | 04 | 79 | | | | | | 05 | 77 | | | | | 29-11-22 | 05 | 65 | | | 2 | Packing (O-ring) | 29-11-20 | 04 | 82 | | | | | | 05 | 75 | | | | | 29-11-22 | 05 | 66 | 2.....….....….....................…..........…....….....1
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