(2)
Flaps and slats
(3)
Landing gear
(4)
ON AIRPLANES WITH HYDRAULIC MOTOR-DRIVEN GENERATOR;
hydraulic motor-driven generator
4. Ground Servicing System
_______________________
A. A central ground servicing station is located in the aft left wing/body fairing. Hydraulic fluid is added to the reservoirs of all three systems from this station. A fill valve selects which reservoir is to receive fluid. A remote quantity indicator shows fluid level in the reservoir selected by the fill valve. Fluid can be added under pressure from a ground service cart or with the manual fill pump installed at the servicing station.
5. Indicating Systems
__________________
A. The indicating system consists of warning lights on the hydraulic control panel and messages on the engine indicating and crew alerting system (EICAS). The indicating systems monitor fluid pressure, temperature, and quantity and reservoir air pressure.
B. For information on the fluid pressure, temperature, quantity and reservoir air pressure indicating systems refer to 29-31-00, 29-32-00, 29-33-00, and 29-35-00, respectively.
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29-00-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
HYDRAULIC POWER - INSPECTION/CHECK
__________________________________
1. General_______
A. This procedure has one task. This task does a check of the hydraulic fluid.
B. The operational environment of the airplane hydraulic system can affect the service life of the hydraulic fluid. You make a decision to take a sample of the hydraulic fluid for analysis if you find that it is necessary from your service experience. Make sure that the fluid analysis results agree with the fluid specification limits shown on Table
601. If the fluid properties are greater than the limits in Table 601, replace some quantity of fluid with new fluid until the fluid properties agree with the limits shown. You make a decision on the quantity of fluid to be replaced.
TASK 29-00-00-206-001
2. Hydraulic Fluid Check_____________________
A. General
(1) You must do the steps in this procedure to clean the bottles which will hold the fluid samples. If you do not do this, it is possible the fluid samples will not be correct. You must get two fluid samples from each hydraulic reservoir. Get the samples in either a polyethylene bottle or a glass bottle which has a capacity of one pint. Get the other sample in a glass bottle. Each bottle has a capacity of 1 pint.
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