*
The center system is isolated and the center system pressure is more than 1200 psi
*
The reserve isolation valve is not open and ACMP C1
pressure is less than 1200 psi
*
The nose gear isolation valve is not open and there is no command to isolate the center system.
The HYD ISLN VALVE status message shows if one or two isolation valves are not in the commanded position.
EFFECTIVITY BEJ ALL 29-10-00
Page 80
D633W101-BEJ Sep 05/2002
MAIN HYDRAULIC SYSTEMS -CENTER HYDRAULIC ISOLATION SYSTEM -FUNCTIONAL DESCRIPTION
EFFECTIVITY BEJ ALL 29-10-00
Page 81
D633W101-BEJ Sep 05/2002
MAIN HYDRAULIC SYSTEMS -TRAINING INFORMATION POINTS -GROUND SERVICING SYSTEM
General
A central fill station in the ground service bay permits you to fill the three hydraulic reservoirs from a single location.
Components
Hydraulic servicing components include:
*
Manual pump handle
*
Manual pump suction hose
*
Pressure fill connection
*
Reservoir fill manual pump
*
Reservoir fill filter
*
Reservoir fill quantity gage
*
Reservoir fill selector valve
*
Instruction placard.
You set the four-position fill selector valve to send hydraulic fluid to one of the three hydraulic systems. The valve is set to OFF after servicing.
The reservoir fill quantity gage shows the reservoir quantity of the selected hydraulic system.
The reservoir fill filter cleans the fluid that goes into the hydraulic systems.
The reservoir fill manual pump permits you to fill the hydraulic systems manually.
EFFECTIVITY
BEJ ALL
The pressure fill connection permits the connection of a ground service cart to fill the hydraulic systems. A cap covers the connection when not in use.
You use the manual pump suction hose during manual fill operation. One end of the hose connects to the manual pump. The other end of the hose goes in the hydraulic fluid container. When not in use, you put the end of the suction hose in a protective cover.
You use the manual pump handle to operate the manual pump. You put the pump handle next to the suction hose when not in use.
Training Information Point
To get the correct results when you do a check of the hydraulic fluid quantities or fill the reservoirs, the airplane should be in this condition:
*
Spoilers retracted
*
Landing gear down
*
Landing gear doors closed
*
Thrust reversers retracted
*
Parking brake accumulator pressure at least 2500 psi.
29-18-00
Page 1 D633W101-BEJ Sep 05/2002
MAIN HYDRAULIC SYSTEMS -TRAINING INFORMATION POINTS -GROUND SERVICING SYSTEM
WARNING: DO NOT GET HYDRAULIC FLUID IN YOUR EYES OR ON YOUR SKIN. THE HYDRAULIC FLUID CAN CAUSE INJURY TO PERSONS. IF YOU GET THE HYDRAULIC FLUID ON YOUR SKIN, FLUSH YOUR SKIN WITH WATER. IF YOU GET THE HYDRAULIC FLUID IN YOUR EYES, FLUSH YOUR EYES WITH WATER AND GET MEDICAL AID. IF YOU GET THE HYDRAULIC FLUID IN YOUR MOUTH, GET MEDICAL AID.
CAUTION: USE CLEAN HYDRAULIC FLUID AND CLEAN EQUIPMENT TO FILL THE HYDRAULIC SYSTEM RESERVOIR. IF YOU DO NOT DO THIS YOU CAN CAUSE CONTAMINATION OF THE HYDRAULIC SYSTEM.
CAUTION: DO NOT OPERATE THE PUMP WHILE THE HANDLE OF THE RESERVIR FILL SELECTOR VALVE IS IN THE OFF POSITION. THIS CAN CAUSE TOO MUCH PRESSURRE IN THE RESERVOIR FILL SYSTEM AND CAN CAUSE DAMAGE TO AIRPLANE EQUIPMENT.
CAUTION: DO NOT FILL THE RESERVOIR TO MORE THAN THE FULL LEVEL. IF YOU PUT TOO MUCH FLUID IN THE RESERVOIR AND THERE IS A CHECK VALVE FAILURE, THE FLUID CAN GO INTO THE DUCTS OF THE PNEUMATIC SYSTEM AND THE AIR CONDITIONING PACKS. IF CONTAMINATION OF THE PNEUMATIC SYSTEM OCCURS MANY TIMES, IT CAN CAUSE DAMAGE TO THE TITANIUM DUCTS. IF YOU PUT TOO MUCH FLUID IN THE RESERVOIR, THE FLUID CAN FLOW OUT OF THE RESERVOIR VENT TUBE, THROUGH THE PRESSURE RELIEF VALVE.
CAUTION: USE A MAXIMUM OF 150 PSI WHEN YOU FILL THE RESERVOIR. TOO MUCH PRESSURE CAN CAUSE DAMAGE TO THE HYDRAULIC RESERVOIR.
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