(2)  
An OF (overfull) indication is displayed next to the digital readout of fluid quantity in the EICAS maintenance mode for readings above

 1.22. The OF indication is generated in the EICAS computer. In addition, a (L, R, C) HYD QTY O/FULL message is displayed on the EICAS maintenance page.

 (3)  
A RF (refill) indication is displayed next to the digital readout of fluid quantity in the EICAS status and maintenance modes for readings below 0.75. The RF indication is generated in the EICAS computer.

 (4)  
A (L, R, C) HYD QTY level C message is displayed on EICAS to indicate a low fluid level in the system reservoir.

 (5)  
For information on the EICAS, refer to AMM 31-41-00.

 B.  Quantity Warning Lights
 (1)  A low quantity warning light for each hydraulic system is on the hydraulic control panel. The warning light illuminates to indicate low fluid level in the system reservoir. This light will also illuminate if reservoir air pressure is low (AMM 29-35-00).
 C.  Remote Quantity Indicator
 (1)  A quantity gage is at the central ground servicing station. This gage shows the fluid level in the reservoir being serviced. For information on this quantity gage, refer to AMM 29-18-00.
 D.  Sight Glasses
 (1)  One sight glass is on each reservoir to visually check the full fluid level.
 E.  Quantity Transmitter
 (1)  The quantity transmitter is a variable capacitor inside each reservoir. The capacitance of the transmitter varies with the change of depth of fluid within the reservoir.
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757
MAINTENANCE MANUAL

HYDRAULIC SYSTEM

PILOT'S OVERHEAD PANEL P5
SYSTEM LOW QUANTITY LIGHT (3 PLACES)
HYDRAULIC SYSTEM CONTROL PANEL

A

Low Quantity Lights
Figure 1

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757
MAINTENANCE MANUAL

Quantity Monitor Unit and Transmitter Locations
Figure 2 (Sheet 1)

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757 MAINTENANCE MANUAL
HYDRAULIC RESERVOIRS SEE C
FUSELAGE SKIN (REF)
TYPICAL HYDRAULIC RESERVOIR
FWD QUANTITYTRANSMITTER
TYPICAL HYDRAULIC RESERVOIR
C
Quantity Monitor Unit and Transmitter Locations
Figure 2 (Sheet 2)

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