757 MAINTENANCE MANUAL
 HYDRAULIC FLUID QUANTITY TRANSMITTER - REMOVAL/INSTALLATION
___________________________________________________________
 1.  General
_______
 A.  This procedure contains steps to remove and install the fluid quantity transmitter in the hydraulic reservoirs.
 B.  There is a fluid quantity transmitter in the reservoir of each hydraulic system.
 TASK 29-33-01-024-001
 2.  Remove the Fluid Quantity Transmitter
_____________________________________
 A.  References
 (1)  
AMM 06-41-00/201, Fuselage Access Door and Panels

 (2)  
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems

 (3)  
AMM 32-00-15/201, Landing Gear Door Locks

 B.  Access
 (1)  
Location Zones 197 Wing to Body - Aft Lower Half (Left) 211/212 Control Cabin 732/742 MLG Body Door

 (2)  
Access Panel
 197KL Hydraulic Service Bay

 C.  Prepare for the Removal
 S 494-002
 WARNING: USE THE PROCEDURE IN AMM 32-00-15 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
To remove the fluid quantity transmitter from the left or right reservoir, open the doors for the landing gear and install the door locks (AMM 32-00-15/201).

 S 014-003

 (2)  
To remove the fluid quantity transmitter from the center reservoir, open the access door for the hydraulic service bay, 197KL (AMM 06-41-00/201).

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A

757
MAINTENANCE MANUAL

HYDRAULIC
RESERVOIRS
SEE A
FUSELAGE SKIN (REF)
A
SIGHT GLASS
1. QUANTITY TRANSMITTER
DRAIN VALVE FWD
A
HYDRAULIC RESERVOIR
(CENTER RESERVOIR IS SHOWN, LEFT AND RIGHT
RESERVOIRS ARE APPROXIMATELY THE SAME)

A
1.
 TRANSMITTER

2.
 O-RING

RESERVOIR
3.
 BOLTS

4.
 WASHERS

ELECTRICAL(4 LOCATIONS) CONNECTOR
A-A
Fluid Quantity Transmitter Installation Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 864-004
 (3)  Remove the pressure from the hydraulic system and reservoir that contains the fluid quantity transmitter that will be removed (AMM 29-11-00/201).
 S 864-033
 WARNING: DO NOT CLOSE THE DRAIN VALVE UNTIL YOU REPLACE THE TRANSMITTER.
_______ IF YOU CLOSE THE DRAIN VALVE, THE FLUID CAN COLLECT IN THE RESERVOIR AND FLOW ON YOU WHEN YOU REMOVE THE TRANSMITTER.
 (4)  
Open the drain valve and drain the reservoir.

 S 864-006

 (5)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:
　
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