29-31-01
 ALL  ú ú 01 Page 403 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 494-026
 (2)  For hydraulic systems No. 2 and No. 3, do this task: Wing Landing Gear Door Locks Installation (AMM 32-00-30/201).
 S 864-003
 WARNING: YOU MUST RELEASE THE PRESSURE IN THE HYDRAULIC SYSTEM BEFORE
_______ YOU OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY TO PERSONS.
 (3)
Release the pressure in the hydraulic system (AMM 29-11-00/201).

 S 864-004

 (4)  
Open the circuit breaker for the applicable hydraulic system and attach a DO-NOT-CLOSE tag:

 (a)  
P415 Main Power Distribution Panel
 1) 415K37 HYD PRESS IND SYS 1
 2) 415K38 HYD PRESS IND SYS 2
 3) 415K39 HYD PRESS IND SYS 3

 (b)  
P414 Main Power Distribution Panel
 1) 414G23 HYD 4 PRESS IND

 S 034-005
 (5)
Disconnect the electrical connector (7) from the transmitter (2).

 S 034-006

 (6)  
Disconnect the hydraulic tube (1) from the snubber (3).

 S 034-007

 (7)
Install a cap on the open tube (1) to keep out contamination.

 S 034-008

 (8)  
Remove the jam nut (4), the packing (5), and the washer (6) from the transmitter (2).

 (a)  
Discard the packing (5).

 S 034-009
 (9)  
Install a cap on the open port on the transmitter (2) to keep out contamination.

 (10)
 Remove the transmitter (2) from the bracket.

 S 024-010
 TASK 29-31-01-404-011
 3. Pressure Transmitter Installation (Fig. 401)
_________________________________
 A. Consumable Materials
 (1)  D00153 Fluid - Hydraulic, Fire Resistant BMS 3-11
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-31-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 B. Parts
 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 2 | Pressure Transmitter (System 1 | 29-31-01 | 01 | 50 | | | | and System 4) | | | | | | 2 | Pressure Transmitter (System 2 | | | 350 | | | | and System 3) | | | | | | 3 | Snubber (System 1 and System 4) | | | 40 | | | 3 | Snubber (System 2 and System 3) | | | 340 | | | 4 | Jamnut (System 1 and System 4) | | | 30 | | | 4 | Jamnut (System 2 and System 3) | | | 330 | | | 5 | Packing (System 1 and System 4) | | | 45 | | | 5 | Packing (System 2 and System 3) | | | 345 | | | 6 | Washer (System 1 and System 4) | | | 35 | | | 6 | Washer (System 2 and System 3) | | | 335 | 2......…........…...................................…..........….....….........1
 C. References
 (1)  
AMM 20-22-01/601, Electrical Bonding

 (2)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 D.
Access

 (1)  
Location Zone 765 System 1 - Body Landing Gear Wheel Well, RH 735 System 2 - Wing Landing Gear Wheel Well, LH 745 System 3 - Wing Landing Gear Wheel Well, RH 765 System 4 - Body Landing Gear Wheel Well, RH

 E.
Procedure

 S 494-027
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  For hydraulic systems No. 1 and No. 4, do this task: Body Landing Gear Door Lock Installation (AMM 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-31-01
 ALL  ú ú 01 Page 405 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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