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 B.  The three reservoirs are round tanks of the same design but of different size. Each reservoir holds 6.6 gallons (25 liters, 5.5 imperial gallons) for left and right systems and 3.5 gallons (13 liters, 2.9 imperial gallons) for the center system. The reservoirs are pressurized to 45-50 psi by the pneumatic system to assure a supply of fluid to the pumps.
 C.  Each reservoir has a quantity transmitter and a sight glass for checking fluid level. Pressure relief, depressurization, drain, and sampling valves and a fluid trap are on each reservoir.
 D.  The pressure relief valve is near the top of the reservoir. The pressure relief valve opens under high air or fluid pressure (60 to 65 psi) to protect the reservoir. The drain valve is a manual valve at the bottom of the reservoir. The sampling valve removes fluid samples at the level of the supply line outlets. The fluid trap holds fluid at the pump supply line outlets during negative-G forces.
ELECTRICAL
CONNECTOR

ELECTRICAL CONNECTOR
SUPPLY PORT
CASE DRAIN PORT RIPPLE DAMPER
MOTOR
PRESSURE PORT
VIBRATION ISOLATION BONDING STRAP
MOUNTS (4 PLACES) 29-11-0002
Alternating Current Motor Pump (ACMP) Figure 4
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MAINTENANCE MANUAL

BRACKET
C System Hydraulic Reservoir
Figure 5

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MAINTENANCE MANUAL

 E.  The depressurization valve is a manual valve located near the top of the reservoir. When a slider on the valve is held in the vented position the pneumatic line is shutoff and reservoir air pressure is vented. A valve lock can be installed to hold the valve slider in the vented position during maintenance. This valve lock must be removed before flight to allow the reservoir to be pressurized by the pneumatic system.
 F.  Each reservoir has two supply outlets. One outlet is connected to a standpipe inside the reservoir to retain a reserve fluid supply at the bottom of the reservoir. The second, or reserve, outlet is not connected to a standpipe and draws fluid from the bottom of the reservoir. In the left and right systems, the reservoir standpipe outlet supplies fluid to the EDP and ACMP. In the center system, the standpipe outlet supplies fluid to the two ACMP's. In the right system, the reserve outlet supplies fluid to the isolated ACMP supply shutoff valve for use in the reserve brakes system. In the left system, the reserve outlet supplies fluid to the power transfer unit (PTU) pump. In the center system, the reserve outlet supplies fluid to the ram air turbine (RAT) pump.
　
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